Monday, October 07, 2013

John Cook's Climate Change Mythbusters 17

This is part of a series reposting material from John Cook's Skeptical Science website. Although he is a physicist rather than a specialist in climate science, he is a convinced "global warmist" and tries to rebut frequently-raised objections to the theory. However, it is always possible to question the data (e.g. this valuable note about measuring temperature) and the line of argument. Please help advance the debate - with facts and logic.

What do the 'Climategate' hacked CRU emails tell us?

What the science says...

Select a level...Intermediate Advanced
A number of independent investigations from different countries, universities and government bodies have investigated the stolen emails and found no evidence of wrong doing. Focusing on a few suggestive emails, taken out of context, merely serves to distract from the wealth of empirical evidence for man-made global warming.

Climate Myth...

Climategate CRU emails suggest conspiracy:
“[T]he 1079 emails and 72 documents seem indeed evidence of a scandal involving most of the most prominent scientists pushing the man-made warming theory - a scandal that is one of the greatest in modern science. […] emails suggesting conspiracy, collusion in exaggerating warming data, possibly illegal destruction of embarrassing information, organised resistance to disclosure, manipulation of data, private admissions of flaws in their public claims and much more.” (Andrew Bolt, Herald Sun)
In November 2009, the servers at the University of East Anglia in Britain were illegally hacked and emails were stolen. When a selection of emails between climate scientists were published on the internet, a few suggestive quotes were seized upon by many claiming global warming was all just a conspiracy. A number of independent enquiries have investigated the conduct of the scientists involved in the emails. All have cleared the scientists of any wrong doing:
  1. In February 2010, the Pennsylvania State University released an Inquiry Report that investigated any 'Climategate' emails involving Dr Michael Mann, a Professor of Penn State's Department of Meteorology. They found that "there exists no credible evidence that Dr. Mann had or has ever engaged in, or participated in, directly or indirectly, any actions with an intent to suppress or to falsify data". On "Mike's Nature trick", they concluded "The so-called “trick”1 was nothing more than a statistical method used to bring two or more different kinds of data sets together in a legitimate fashion by a technique that has been reviewed by a broad array of peers in the field."
  2. In March 2010, the UK government's House of Commons Science and Technology Committee published a report finding that the criticisms of the Climate Research Unit (CRU) were misplaced and that CRU’s "Professor Jones’s actions were in line with common practice in the climate science community".
  3. In April 2010, the University of East Anglia set up an international Scientific Assessment Panel, in consultation with the Royal Society and chaired by Professor Ron Oxburgh. The Report of the International Panel assessed the integrity of the research published by the CRU and found "no evidence of any deliberate scientific malpractice in any of the work of the Climatic Research Unit".
  4. In June 2010, the Pennsylvania State University published their Final Investigation Report, determining "there is no substance to the allegation against Dr. Michael E. Mann".
  5. In July 2010, the University of East Anglia published the Independent Climate Change Email Review report. They examined the emails to assess whether manipulation or suppression of data occurred and concluded that "The scientists’ rigor and honesty are not in doubt".
  6. In July 2010, the US Environmental Protection Agency investigated the emails and "found this was simply a candid discussion of scientists working through issues that arise in compiling and presenting large complex data sets."
  7. In September 2010, the UK Government responded to the House of Commons Science and Technology Committee report, chaired by Sir Muir Russell. On the issue of releasing data, they found "In the instance of the CRU, the scientists were not legally allowed to give out the data". On the issue of attempting to corrupt the peer-review process, they found "The evidence that we have seen does not suggest that Professor Jones was trying to subvert the peer review process. Academics should not be criticised for making informal comments on academic papers".
  8. In February 2011, the Department of Commerce Inspector General conducted an independent review of the emails and found "no evidence in the CRU emails that NOAA inappropriately manipulated data".
  9. In August 2011, the National Science Foundation concluded "Finding no research misconduct or other matter raised by the various regulations and laws discussed above, this case is closed".
Just as there are many independent lines of evidence that humans are causing global warming, similarly a number of independent investigations have found no evidence of falsification or conspiracy by climate scientists.

"Mike's Nature trick" and "hide the decline"

The most quoted email is from Phil Jones discussing paleo-data used to reconstruct past temperatures (emphasis mine):
"I've just completed Mike's Nature trick of adding in the real temps to each series for the last 20 years (ie from 1981 onwards) and from 1961 for Keith's to hide the decline."
"Mike's Nature trick" refers to a technique (aka "trick of the trade") used in a paper published in Nature by lead author Michael Mann (Mann 1998). The "trick" is the technique of plotting recent instrumental data along with the reconstructed data. This places recent global warming trends in the context of temperature changes over longer time scales.
 
The most common misconception regarding this email is the assumption that "decline" refers to declining temperatures. It actually refers to a decline in the reliability of tree rings to reflect temperatures after 1960. This is known as the "divergence problem" where tree ring proxies diverge from modern instrumental temperature records after 1960. The divergence problem is discussed in the peer reviewed literature as early as 1995, suggesting a change in the sensitivity of tree growth to temperature in recent decades (Briffa 1998). It is also examined more recently in Wilmking 2008 which explores techniques in eliminating the divergence problem. So when you look at Phil Jone's email in the context of the science discussed, it is not the schemings of a climate conspiracy but technical discussions of data handling techniques available in the peer reviewed literature. More on the hockey stick divergence problem...

Trenberth's "travesty we can't account for the lack of warming"

The second most cited email is from climate scientist and IPCC lead author Kevin Trenberth. The highlighted quote is this: "The fact is that we can't account for the lack of warming at the moment and it is a travesty that we can't." This has been most commonly interpreted (among skeptics) as climate scientists secretly admitting amongst themselves that global warming really has stopped. Trenberth is actually discussing a paper he'd recently published that discusses the planet's energy budget - how much net energy is flowing into our climate and where it's going (Trenberth 2009).
 
In Trenberth's paper, he discusses how we know the planet is continually heating due to increasing carbon dioxide. Nevertheless, surface temperature sometimes shows short term cooling periods. This is due to internal variability and Trenberth was lamenting that our observation systems can't comprehensively track all the energy flow through the climate system. More on Trenberth's travesty...

The full body of evidence for man-made global warming

An important point to realise is that the emails involve a handful of scientists discussing a few pieces of climate data. Even without this data, there is still an overwhelming and consistent body of evidence, painstakingly compiled by independent scientific teams from institutions across the world.
What do they find? The planet is steadily accumulating heat. When you add up all the heat building in the oceans, land and atmosphere plus the energy required to melt glaciers and ice sheets, the planet has been accumulating heat at a rate of 190,260 Gigawatts over the past 40 years (Murphy 2009). Considering a typical nuclear power plant has an output of 1 Gigawatt, imagine over 190,000 power plants pouring their energy output directly into heating our land and oceans, melting ice and warming the air.
 
This build-up of heat is causing ice loss across the globe, from the Arctic to the Antarctic. Both Greenland and Antarctica are losing ice at an accelerated rate (Velicogna 2009, ). Even East Antarctica, previously thought to be too cold and stable, is now losing ice mass (Chen 2009). Glacier shrinkage is accelerating. Arctic sea ice has fallen so sharply, observations exceed even the IPCC worst case scenario. The combination of warming oceans and melting ice has resulted in sea level rise tracking the upper limit of IPCC predictions.
 
Rising temperatures have impacted animal and plant species worldwide. The distribution of tree lines, plants and many species of animals are moving into cooler regions towards the poles. As the onset of spring is happening earlier each year, animal and plant species are responding to the shift in seasons. Scientists observe that frog breeding, bird nesting, flowering and migration patterns are all occurring earlier in the year (Parmeson 2003). There are many other physical signs of widespread warming. The height of the tropopause, a layer in our atmosphere, is rising (Santer 2003). Arctic permafrost, covering about 25% of Northern Hemisphere land, is warming and degrading (Walsh 2009). The tropical belt is widening (Seidel 2007). These results are all consistent with global warming.
 
What’s causing this heat build-up? Humans are emitting huge amounts of carbon dioxide into the atmosphere - 29 billion tonnes in 2009 (CDIAC). Greenhouse theory predicts that more carbon dioxide in the atmosphere will trap heat energy as it escapes out to space. What do we observe? Carbon dioxide absorbs heat at certain wavelengths. Satellites over the past 40 years find less heat escaping to space at these wavelengths (Harries 2001, Griggs 2004, Chen 2007). Where does the heat go? Surface measurements find more heat returning back to the Earth's surface (Philipona 2004). Tellingly, the increase occurs at those same carbon dioxide absorption wavelengths (Evans 2006). This is the human fingerprint in global warming.
 
There are multiple lines of empirical evidence that global warming is happening and human activity is the cause. A few suggestive emails may serve as a useful distraction for those wishing to avoid the physical realities of climate change. But they change nothing about our scientific understanding of humanity’s role in global warming.

Last updated on 18 March 2012 by dana1981. View Archives
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From money to weather to money


Martin Armstrong's latest post advertises Planalytics Inc, a company specialising on business-relevant weather forecasting. According to Armstrong, he was connected with its forerunner, Strategic Weather, and the system employs cyclical models that he claims are far more accurate than traditional forecasting methods.

Armstrong has been interested in cycles for over 40 years, having developed his own "Economic Confidence Model" for investment. It's based on an 8.6-year cycle that when multiplied by the number of days in the solar year (365.25) yields a number approximating to Pi (π), which is the ratio of the circumference of a circle to its diameter. Why this number should be relevant to investment is a mystery to me, but it appears to work for Armstrong.

Anyhow, an approach that started with business is now applied to weather and then back to business - a cycle of its own.

All original material is copyright of its author. Fair use permitted. Contact via comment. Unless indicated otherwise, all internet links accessed at time of writing. Nothing here should be taken as personal advice, financial or otherwise. No liability is accepted for third-party content, whether incorporated in or linked to this blog; or for unintentional error and inaccuracy. The blog author may have, or intend to change, a personal position in any stock or other kind of investment mentioned.

Sunday, October 06, 2013

The bonds of behaviour

It seems to me that one of life’s little problems is conversation, or rather lack of conversation. How many people are there in your particular circle with whom you have meaty conversations. Serious conversations about the existence of God, life on other planets, climate change, political correctness, moral standards or whatever.

Is it related to this dumbing-down we keep hearing about? Maybe not, maybe it’s more fundamental. To my mind it has something to do with the fact, at least I think it’s a fact, that we are not encouraged to be analytical with respect to our own behaviour.

One of the oldest and most enduring social discoveries is the idea that we simply respond to a stimulus in a way that has previously been positive for us and avoid those which have been negative. It goes back at least as far as the pleasure/pain principle of Epicurus, although to my mind the word pleasure has too many physical connotations and peace is often better.

From Wikipedia
For Epicurus, the purpose of philosophy was to attain the happy, tranquil life, characterized by ataraxia—peace and freedom from fear—and aponia—the absence of pain—and by living a self-sufficient life surrounded by friends.

However we describe it, our lives are a record of positive and negative impacts and feedbacks and the way they made us what we are. It’s a simple enough philosophy and very powerful but we don’t make much direct use of it. Yet the rich and powerful have always used it as the primary method of social control. It is used today in mind-boggling detail and presumably always will be.

We don’t seem teach the pleasure/pain principle to children in any systematic way though, even though the idea is simple, suited to role playing and the value of it screamingly obvious. I wonder why?

Perhaps the whole idea is just too revealing?

The rich and powerful still need it as much as ever because they don’t have anything else. So they have to use it covertly, obliquely or at least keep it below the mainstream radar most of the time.

David Cameron’s reference to nudge theory is an obvious example of how the idea is still seen as politically unidirectional – from rulers to ruled. After all, anyone might reasonably ask how Cameron responds to nudges from the electorate. Maybe he responds to winks from his cronies instead.

Sip a cup of coffee and put it down because it is too hot. Stimulus and response – we are bound by it throughout our lives but rarely bring it into the open and admit the mechanical nature of much of what we do – much of what we are. Maybe there is anticipated pain which prevents us from knowing too much about ourselves.

A painful shattering of illusions perhaps?

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Energy Policy: Omnibus Post

For most of the time we are all capable of sailing serenely on in ignorance of how fundamentally our world-views differ from those of others; but once in a while the chasm is illuminated by a bolt from the blue.

One such event happened when Miliband launched his 'energy price freeze' policy.  I and many others in the 'sphere and MSM alike immediately clapped our hands to our heads and proclaimed, that's it ! - he's completely lost it, and shot himself in the vitals on prime-time TV to boot.  We clearly thought the lunacy of it would be obvious to all.

But not a bit of it, because the reaction of other commentators was: a price freeze - so what ?  No big deal, even if it's not something we particularly applaud; and anyhow, the energy companies had it coming. 

In other words, there is no general consensus or shared understanding on some pretty basic energy market concepts.  So here are some responses to the interesting exchanges between 'Timbo', 'BE' and 'BQ' on the comments thread to a recent C@W post.  I'm going to focus on short- / medium-term, (say, out to 15 years hence) because the really long-term stuff is unknowable, thanks to technology shifts we can barely guess at.  (In which latter category I place Timbo's fascinating comments on electricity storage, the Holy Grail of energy policy which would transform the landscape.)

The paramount fundamental is that electricity has staggering high 'utility value', i.e. people (in developed economies) will pay almost any price to get it.  Second only to food, for most people.  (Water comes third because you can generally makes your own arrangements, up to a point.)  By this standard, as Timbo wrote, "...how cheap the grid is.  It's dirt cheap".  And when people will pay almost any price ... things can go horribly wrong.

Notwithstanding various developments in micro- and distributed-generation, and predictions of more to come, the kind of electricity and energy we all want - permanently available, in bulk, almost everywhere we go, and relatively cheap - requires centralised 'organisation' (grids, despatch and balancing systems), if not actually 20th-century style centralised generation.  And this isn't just power for domestic use, schools and hospitals: as BQ said, "you can't run a blast furnace on wood".  The saintly George Moonbat tried very hard to run a self-sufficient smallholding in Wales, and just about managed OK for a couple of years until he had a bad winter - after which he suddenly became a convert to nuclear power.

It used to be thought (and still is, in some dark quarters) that only centralised ownership, or at least centralised control, could deliver the goods: but this was comprehensively disproved in the UK and other regions with the advent of full bilateral (self-despatching) markets at the beginning of this century, which not only confounded the statists dirigistes by working at all, they worked better, and reduced electricity costs as their proponents (incl. yours truly) said they would.  Even the Labour Party still signs up for this, (see Caroline Flint on Brillo's Sunday programme: and the changes that brought it about in in the UK 2001 were put through Parliament by Mandelson) so dissenters are up against it politically.

But there are problems.  Firstly, bilateral market structures, though basically robust, are vulnerable to large-scale interference by the heavy-handed and dull-witted.  This includes many politicians and almost all civil servants.  In particular, there is a limit to how much ill-considered (indeed, sometimes actually infeasible) 'decarbonisation' policy can be loaded onto a market framework without it buckling.   Of course, in this country the rot started under Miliband lui-même when in power - oh the irony - but has been further perpetrated here by t'Coalition (and on an even more manic scale in Germany).  

(As an aside, the chronic state of our Heath-Robinson energy policy makes it very easy for any politician to score a few easy and populist points against it.  That Miliband is the first one to do so on a grand scale, is just hilarious.)

The second point is that those bilateral market structures are relatively new and by no means perfected, even before they started to be messed with.  In particular, (a) liquidity in some parts of the power markets, here and elsewhere, left quite a lot to be desired.  Liquidity, for those who don't have an instinct for it (this includes many politicians and almost all civil servants ...) is absolutely vital for markets to deliver for consumers. Ofgem, which had this forcibly brought to their attention nearly a decade ago, has been farting around ineffectually on the issue ever since.

(b) A related point: the state of competition is unsatisfactory.  There is no reason why the current UK  'supply' set-up - 6 massive players plus a host of lesser ones - shouldn't make for a competitive market.  It is, in fact, more competitive than many people give it credit for.  But there's a damaging, mutually reinforcing effect at work:  unsatisfactory wholesale liquidity makes suppliers migrate towards vertical integration (i.e., becoming generators as well), which further reduces liquidity ... etc etc.  

[To illustrate: Centrica set out in 1996 intending to be a capital-S Specialised Supplier (of gas and power), with no power generation at all and limited gas production of its own (the 'merchant', or 'Enron' model).  But over the years, they found liquidity in the wholesale markets less than satisfactory.  So they have slowly become more and more vertically integrated, to the point where now they have about 75% cover for their supply obligations from their own 'upstream' assets (power plants, gas fields and some large long-term purchases).  This means that, where once they were trading in the wholesale markets for almost all their needs, they are now only trading for 25% (net) of their needs, plus some spec trading etc.]

Two dreadful policy decisions have gravely exacerbated this situation.  The first was to allow large-scale vertical integration by acquisition.  This was of course re-integration, because throughout the whole of the 1990's, Ofgas and Offer (the worthy predecessors of Ofgem) had been preoccupied with breaking up the old verticals (themselves the products of the two big privatisations of the 1980s).  The worst examples of vertical integration by acquisition were (1) Powergen's purchase of Eastern Electricity and other UK assets, followed by E.on's subsequent purchases of both Powergen here and Ruhrgas in Germany; (2) EDF's purchase of British Energy.  These should have been stopped by UK and EC regulators - not because vertical integration is intrinsically wicked, but because the markets weren't sufficiently liquid at the time.  (In fact, truly liquid markets make vertical integration a very dubious commercial proposition - which is the virtuous-circle side of the liquidity picture.  We are stuck with the vicious circle.) 

The second disaster for the liquidity/competition downward spiral is the manner in which decarbonisation is being pursued.  In the UK this means the ridiculous 'Electricity Market Reforms', which - take it from me - undermine liquidity still further, even as ministers and Ofgem continue to pay lip-service to the need for better liquidity.  It's hugely perverse, because several critical aspects of EMR are wholly dependent on there being deeply liquid markets in existence.  They will fail miserably, and piecemeal government interventions of the most grotesque kind will result - the civil servants can hardly contain their excitement at the prospect.  And they will probably keep the lights on, because we can and will pay (see above) - almost any price.

Which brings us back to Miliband's 'price freeze'.  I've banged on too long already to dissect this in detail.  Suffice to repeat: it's bonkers, it's a cheap populist shot, and will have negative consequences far outweighing any limited relief it may deliver to consumers.  Interestingly, in answer to Brillo's questions Caroline Flint (who, it must be said, was quite well briefed) quickly mentioned the really significant new Labour policy, which is to re-introduce something akin to the 'Pool market' (i.e. an end to the bilateral / self-despatch system) which was how things were run here in the 1990's.  It wasn't a disaster, but it was definitely very inefficient.  And - oh, how these things go full circle - it was dreamed up by Oliver sh*t-for-brains Letwin ! (Who still hankers after it, I can tell you, as do civil servants and all the old CEGB dinosaurs.)


This post first appeared on the Capitalists@Work blog



 
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Decimalisation and inflation

When the pound went decimal, we exchanged a useful system for one that worked less well.

The decimalisation of British currency in the early 1970s was not in itself treasonable, but it formed part of the preparation for our joining what we now know as the EU, though then it was sold to us as simply an international trading arrangement. This latter deceit and the unauthorised constitutional change it smuggled in have been called - in my view correctly - treason by Albert Burgess and others, assuming that the people of Britain are, by ancient custom and practice, entitled to a say in how they are governed.

Reckoning in units of base 10 is convenient for scientists who need to interrelate mutiple forces and physical measurements, but in the world of everyday human interaction the old monetary units worked better.

The reason is divisibility.

The modern pound of 100 pence can be divided in 7 ways: by 2,4,5,10,20,25 and 50.

The old pound - 20 shillings of 12 pence each, making 240 pence - can be divided in 18 ways: by 2,3,4,5,6,8,10,12,15,16,20,24,30,40,48,60,80 and 120. Using halfpennies, you could also split the pound by 32, 96 and 160; and with farthings (quarter pennies, still used until 1960) you could further divide £1 by 64 and 192.
 
So the old way functioned 3 times better than the new one, technically speaking. In fact, because the new penny was worth 1.2 times the old one, it impacted on low-value items (sweets, for example), so for a few years (1971 - 1984) the new decimal currency included halfpennies. There was even an unrealised plan for a decimal farthing.

The reason why all this may seem trivial to you, is the deadly assassin of money and savings: inflation.

Discounting the effects of wars and poor harvests, overall prices in England were stable for centuries until the sixteenth-century enthusiasm for empire and the importation of New World gold:


http://www.hist.umn.edu/~ruggles/hist5011/phelps-brown%20and%20hopkins.pdf

But the money system stabilised again by the late 17th century. The Bank of England's website has a page that lets you calculate cumulative inflation for any period from 1750 onwards. According to them, a basket of goods and services costing £1 in 1750 would have cost (the equivalent of) £1.80 in 1900 - an average annual inflation rate of 0.3%. That period covers the tremendous increase in productivity introduced by the Industrial Revolution and further late-nineteenth-century scientific and technological developments, so inflation is not needed for business and prosperity.

An 80% increase in prices took 150 years to develop.

Yet the same database shows that a very similar increase (£1 to £1.81) occurred in the space of four years in the 20th century between 1974 and 1978. And since 1900, we have seen an overall increase of 10,408%. That's not a typing mistake: £1 in 1900 was worth the same as £104.08 in 2012.

All caused by a seemingly gentle average inflation rate of 4.2% per year. The Bank of England's "target" for annual inflation is now 2%, which means that is is now official policy for us to suffer an 80% increase in prices over 30 years instead of 150 years - in one generation, instead of five or six.

This is why the old pound will never return. Farthings and halfpennies have gone, and so have the old pennies. Now, Canada has discarded its near-worthless penny and the UK is thinking of doing the same.

By law since the 13th century, a penny (the old one) used to buy you a loaf of bread; in the Middle Ages, five or six of them would buy a day's labour from a thatcher, or a four-pound (1.8 kg) loaf. (The ancient English bread laws were abolished by EU directive this year, and last month Tesco began to take advantage of the changes in weight regulation.)

Why inflation at all? Perhaps the answer is in the Cantillon effect: "the original recipients of new money enjoy higher standards of living at the expense of later recipients."

Who is receiving these fresh supplies of money today? The banks, who borrow from the BoE at incredibly low rates, and lend to the Government and hedge fund managers at rates you will never get. And inflate the currency by introducing vast amounts of credit, rotting the value of your cash savings and boosting some prices (e.g. for houses) hopelessly beyond the reach of many people.

They were hanging and burning people - women as well as men - for debasing and forging money, as late as 1789. Now, through its privateer agents the BoE and banks, the Government is doing it, and intends to continue doing it. Nobody important will stop it, because this systematic sweeping-up of the people's wealth into a few pockets allows an elite to buy the services of former lawmakers and broadcasters - look at JP Morgan and Tony Blair (and the BBC's Stephanie Flanders).

Our system of government has been corrupted and betrayed. I have sympathy for those who protest against it; but little hope that we will get reform before disaster forces it upon us.

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Saturday, October 05, 2013

Energy use and the internet

Image by Sackerson: http://theylaughedatnoah.blogspot.co.uk/

"Worldwide... digital warehouses use about 30 billion watts of electricity, roughly equivalent to the output of 30 nuclear power plants", says the New York Times.

Wikipedia reckons global electricity consumption in 2008 was 20,279,640 billion watts, so internet servers use around 1.3% of the total (presumably more as more of the world gets connected).

But we have to add to that the power usage by machines that access the data. According to Time Magazine, a report in July ("The Cloud begins with Coal" - pdf) by Mark Mills of the Digital Power Group estimates the total IT system to be around 10% of world electricity production.

The Time writer paraphrases him: "It’s the same amount of electricity that was used to light the entire planet in 1985. We already use 50% more energy to move bytes than we do to move planes in global aviation."

The first Sinclair home computer offered 1 kilobyte (1,024 bytes) and the next (the Spectrum, which I bought) boasted 64 kilobytes. New word (for me): "zettabyte" (used in slide 3 in Mills' presentation). 1 zettabyte = 1,000,000,000,000,000,000,000 bytes. Here is Mill's graph showing estimated current (4 - 5 ZB) and forecast data usage: 

(Mills, from slide 5)

Mills points out that coal is the world's most important energy source, and IT is using more and more. Perhaps when the mines are empty, we need no longer worry about the NSA/GCHQ's cybersnooping.

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Albert Burgess: reporting treason


In December 2006 I was given a CD-ROM with over 200 pages of documents retrieved from the Public Records Office by David Barnby, each page headed Secret, Classified, or Restricted. I was told these were of historical interest, so I sat down to read them with my historian’s hat on.

After ten minutes my historian’s hat had been kicked into touch and I was wearing my constable’s hat as I exclaimed to myself, “My God, this is sedition!” I hit the print button and printed off all the pages. I then sat down pencil in hand to make notes. Once I had satisfied myself that crimes of sedition and treason had been disclosed, I took the papers to St Aldate's Police Station in Oxford, a 15-mile drive from my home in Thame.

On arrival I was greeted by a civilian counter clerk. I asked if he could get me a police officer. He said, "Why?" I said, "I want to report a crime." He said, "You don't report crime here, you phone this number," and he chucked an 0845 number at me. I pirouetted around in the police station front office and said "This is a police station, is it"? He said, "Yes." I said, "Then get me a policeman.” He said, "Perhaps if you tell me what it’s about?”

My first thought was to tell him to mind his own business and get me a police officer, but I said, "Yes, well, it’s about the fact that Edward Heath, one-time Prime Minister, set up a conspiracy to subvert the Constitution, the major crime of Sedition at Common Law, and at this level of sedition an act of high treason against the Constitution and people of England. And his conspiracy planned to hand over this Kingdom to a foreign power, the EEC, the major crime of high treason. Are you any the wiser?” He said, "No." I said, "Then get me a policeman!”

He vanished out the back and came back with the tallest police sergeant I have ever seen, who I now know to be Sgt Thomas. Sgt Thomas walked up the counter, placed his hands on it and in a very I've-got-a-lunatic-here tone of voice said, "YES SIR, AND WHAT CAN I DO FOR YOU"?

I said, "Well, Sergeant, the first thing you can do for me is open up one of these interview rooms so we can sit at a table and discuss this in relative comfort." The look in his eyes was one of utter confusion: after all, no-one walks into a police station and tells the duty sergeant what to do, but I had done just that. He stood for a moment, not sure what to do, then he walked away and opened the interview room and my journey had begun.

I explained to him how Edward Heath had set up a conspiracy using a Foreign Office civil servant by the name of Norman Redaway (now deceased) who worked in the information research department (IRD), which used to be known as the Special Operations Executive, which trained (SOE) agents to be dropped into occupied Europe to work with the Resistance. Redaway was a spook. The SOE was disbanded in 1946 and IRD was born.

Sergeant Thomas said, "But Heath is dead!” I said, "I know, but some of his people are still alive." After about 45 minutes talking Sgt Thomas said he couldn't deal with this, he would have to take it upstairs. I agreed and giving him a full print out of the documents retrieved from the Public Records Office, I left.   

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Russian carbon sequestration: bigger picture needed?

Writing for the green website Grist, John Upton quotes Russian research released in August that claims abandoned farmland there has taken up large amounts of CO2 since the collapse of the Soviet Union in the 1990s. Reporting on the same, New Scientist says this equates to 10 per cent of Russia's carbon dioxide emissions from fossil fuels (although the study's abstract says "... ~10% of the annual C sink in all Russian forests", so not having access to the full text I don't know whether the NS has misread).

However it seems to me that there is a limit to how much the wild vegetation will absorb, as it will reach maturity (presumably in the form of reforestation).

Also, even though many Russians have given up farming, they haven't stopped eating. So someone somewhere else is farming for them, and if that's in foreign countries there is an energy and emission implication in getting the food to market. So per capita, I suspect CO2 emissions relating to food have increased.

To some extent there may be some offsetting for demographic change - the Russian population shrank in the post-collapse years - but the population has begun to grow again.

I'd think it's more important to look at Russian industry and the extent to which emission reductions have been achieved because of more efficient plant, as opposed to being caused by the loss of productive capacity to (for example) coal-burning China.

If you're a global warmist, can we have a global picture, please?

All original material is copyright of its author. Fair use permitted. Contact via comment. Unless indicated otherwise, all internet links accessed at time of writing. Nothing here should be taken as personal advice, financial or otherwise. No liability is accepted for third-party content, whether incorporated in or linked to this blog; or for unintentional error and inaccuracy. The blog author may have, or intend to change, a personal position in any stock or other kind of investment mentioned.

Friday, October 04, 2013

The No-Fail Tipster does it again!



Another stunning 16-1 betting coup by Broad Oak's The Punter's Friend left the bookies drowning their sorrows at Ascot this afternoon, as Intibaah romped home in the 3.05.

Right every time, as always!

Too good to be true? Doubt our infallible racing pundit? See the evidence for yourself in this morning's posting (last updated 7 p.m. today).

Read The Punter's Friend every day in your soaraway Broad Oak Magazine!

All original material is copyright of its author. Fair use permitted. Contact via comment. Unless indicated otherwise, all internet links accessed at time of writing. Nothing here should be taken as personal advice, financial or otherwise. No liability is accepted for third-party content, whether incorporated in or linked to this blog; or for unintentional error and inaccuracy. The blog author may have, or intend to change, a personal position in any stock or other kind of investment mentioned.

The Daily Mail's memory hole and David Rose's Arctic ice

UPDATE (19:00): My tip for Intibaah to win the 3.05 at Ascot today was, as usual, completely correct.

Those who have read Orwell's "1984" will remember the 'memory hole' down which Winston Smith would lose historical evidence that was inconvenient to the current official narrative.

Spot the differences in this modern example:

Daily Mail online, 8 September 2013
- and 20 days later...

Daily Mail online, 28 September 2013
Perhaps the rewriting of history was in response to this video (htp: Paddington), from which the first image above was taken (at 24 seconds in):



As it happens, I am a Daily Mail reader (or skimmer), and this paper makes many people gibber (see this site); but as I said to someone who posted the latter link to his Facebook page,

"The Mail is hated by groupthinking Lefties, esp. R4 comedians who expect sycophantic laughs for their own prejudices instead of wit. It's successful because it cast its net wide - look at the funnies page (always the soul of a newspaper) to see how disparate and mutually antipathetic its subsets of readers. I read it to get the gist of the national agenda, not to share its point of view - when it has one, instead of blowing hot and cold, which is what it usually does."

Clearly even David Rose has recognised that he had blown too cool on this occasion - though retrospectively rewriting the original piece instead of issuing a correction illustrates the exuberant self-granted journalistic license that made me for a time suspect that he was really Johann Hari come in from the cold.

And now my infallible, solid-gold tip for the winner of the 3.05 pm at Ascot this afternoon: #1 - Intibaah - odds forecast 16/1. Fill yer boots! (Important note: this post updated at 19:00 on 04.10.2013).

Read The Punter's Friend every day in your soaraway Broad Oak Magazine!

All original material is copyright of its author. Fair use permitted. Contact via comment. Unless indicated otherwise, all internet links accessed at time of writing. Nothing here should be taken as personal advice, financial or otherwise. No liability is accepted for third-party content, whether incorporated in or linked to this blog; or for unintentional error and inaccuracy. The blog author may have, or intend to change, a personal position in any stock or other kind of investment mentioned.

Leather

An old German anecdote:

As he was accompanying a duchess into the dining-hall, a German general remarked on the long leather gloves she wore, as was then the fashion, and asked her why. "They keep my arms and hands soft and supple," she replied.

"That's odd," said the general, "for I wear lederhosen and my arse is as rough as a rasp (so rauh wie ein Reibeisen)."




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Thursday, October 03, 2013

The future of climate change

Environmental science tends to be carried out within a regulatory regime which why it attracts funding. Once established, the regulatory regime is in the driving seat, not the science.

This is a fact of life for environmental scientists. The science is mostly about monitoring regulatory compliance and providing evidence for prosecution where such things as discharge licences, emission licences or environmental laws have been broken.

I must have signed many hundreds of witness statements in my role as an expert witness in cases of water pollution, although I hardly ever had to attend court as scientific evidence was challenged only rarely. The witness statement was almost always sufficient.

What we refer to climate change with its associated treaties and laws is merely another regulatory regime but on a global scale. Climate science has a similar support role to other regulatory regimes, but the science is significantly less mature and dependable.

As well as having an enforcement role, the environmental scientist’s job may be to provide a scientific basis for new regulations. For example the quantification and regulation of dioxins and dioxin like substances in the environment.

It requires spending on advanced analytical technology and the development of reliable methods for the sampling and analysis of soil samples. This means reliable enough to go to court and give evidence about scientific results under oath.

Provision of funding and expertise for new environmental investigations is the positive side of regulatory regimes. Another example has been the identification and quantification of endocrine disruptors in the environment.

In this respect, climate change is a fairly typical if wildly controversial and ambitious regulatory regime. It has facilitated funding and expertise for the investigation of an alleged environmental problem due to human emissions of CO2 into the atmosphere supposedly causing a rise in global temperature.

As I see it, the problem with the regulatory regime for the global climate is a clumsy desire by UNEP to regulate combustion processes before the scientific rationale devised by the IPCC was known to be sound.

For me this has been one of the most startling aspects of climate change – the science is horrible and nowhere near reliable enough for regulatory purposes. I suppose one advantage of a carbon market is that m’learned friends are given no opportunity to pick apart the science in an enforcement process based on prosecution.

So what does the future have in store?

To my mind, the most interesting aspect is the future direction of global temperatures. The climate is in charge here, not UNEP or the IPCC. It’s as if Defra had no idea what the Thames might do next.

If a global warming trend sets in, then it will probably be business as usual and the regulatory regime will require climate scientists to carry on as if nothing untoward happened. They won’t spend much time on explaining the warming hiatus either.

If the warming hiatus continues or a global cooling trend sets in, then it may still be business as usual, but how they intend to carry it off I have no idea. There may be contingency plans spoken of in private, but you or I will never hear of them until the press releases pop up.

A much bigger problem is the obvious damage done to national energy policies as they become more and more absurd. Somehow the climate regime may have to compromise on this one.

Don’t bet on it though – regulatory regimes don’t care about a few thousand extra deaths each winter.

All original material is copyright of its author. Fair use permitted. Contact via comment. Unless indicated otherwise, all internet links accessed at time of writing. Nothing here should be taken as personal advice, financial or otherwise. No liability is accepted for third-party content, whether incorporated in or linked to this blog; or for unintentional error and inaccuracy. The blog author may have, or intend to change, a personal position in any stock or other kind of investment mentioned.

John Cook's Climate Change Mythbusters 16

This is part of a series reposting material from John Cook's Skeptical Science website. Although he is a physicist rather than a specialist in climate science, he is a convinced "global warmist" and tries to rebut frequently-raised objections to the theory. However, it is always possible to question the data (e.g. this valuable note about measuring temperature) and the line of argument. Please help advance the debate - with facts and logic.
_______________________________________________________

What evidence is there for the hockey stick?

What The Science Says:
Since the hockey stick paper in 1998, there have been a number of proxy studies analysing a variety of different sources including corals, stalagmites, tree rings, boreholes and ice cores. They all confirm the original hockey stick conclusion: the 20th century is the warmest in the last 1000 years and that warming was most dramatic after 1920.
Climate Myth: Hockey stick is broken
“In 2003 Professor McKitrick teamed with a Canadian engineer, Steve McIntyre, in attempting to replicate the chart and finally debunked it as statistical nonsense. They revealed how the chart was derived from "collation errors, unjustified truncation or extrapolation of source data, obsolete data, incorrect principal component calculations, geographical mislocations and other serious defects" -- substantially affecting the temperature index.” (John McLaughlin)
The "hockey stick" describes a reconstruction of past temperature over the past 1000 to 2000 years using tree-rings, ice cores, coral and other records that act as proxies for temperature (Mann 1999). The reconstruction found that global temperature gradually cooled over the last 1000 years with a sharp upturn in the 20th Century. The principal result from the hockey stick is that global temperatures over the last few decades are the warmest in the last 1000 years.


Figure 1: Northern Hemisphere temperature changes estimated from various proxy records shown in blue (Mann 1999). Instrumental data shown in red. Note the large uncertainty (grey area) as you go further back in time.

A critique of the hockey stick was published in 2004 (McIntyre 2004), claiming the hockey stick shape was the inevitable result of the statistical method used (principal components analysis). They also claimed temperatures over the 15th Century were derived from one bristlecone pine proxy record. They concluded that the hockey stick shape was not statistically significant.

An independent assessment of Mann's hockey stick was conducted by the National Center for Atmospheric Research (Wahl 2007). They reconstructed temperatures employing a variety of statistical techniques (with and without principal components analysis). Their results found slightly different temperatures in the early 15th Century. However, they confirmed the principal results of the original hockey stick - that the warming trend and temperatures over the last few decades are unprecedented over at least the last 600 years.


Figure 2: Original hockey stick graph (blue - MBH1998) compared to Wahl & Ammann reconstruction (red). Instrumental record in black (Wahl 2007).

While many continue to fixate on Mann's early work on proxy records, the science of paleoclimatology has moved on. Since 1999, there have been many independent reconstructions of past temperatures, using a variety of proxy data and a number of different methodologies. All find the same result - that the last few decades are the hottest in the last 500 to 2000 years (depending on how far back the reconstruction goes). What are some of the proxies that are used to determine past temperature?

Changes in surface temperature send thermal waves underground, cooling or warming the subterranean rock. To track these changes, underground temperature measurements were examined from over 350 bore holes in North America, Europe, Southern Africa and Australia (Huang 2000). Borehole reconstructions aren't able to give short term variation, yielding only century-scale trends. What they find is that the 20th century is the warmest of the past five centuries with the strongest warming trend in 500 years.


Figure 3: Global surface temperature change over the last five centuries from boreholes (thick red line). Shading represents uncertainty. Blue line is a five year running average of HadCRUT global surface air temperature (Huang 2000).

Stalagmites (or speleothems) are formed from groundwater within underground caverns. As they're annually banded, the thickness of the layers can be used as climate proxies. A reconstruction of Northern Hemisphere temperature from stalagmites shows that while the uncertainty range (grey area) is significant, the temperature in the latter 20th Century exceeds the maximum estimate over the past 500 years (Smith 2006).


Figure 4: Northern Hemisphere annual temperature reconstruction from speleothem reconstructions shown with 2 standard error (shaded area) (Smith 2006).

Historical records of glacier length can be used as a proxy for temperature. As the number of monitored glaciers diminishes in the past, the uncertainty grows accordingly. Nevertheless, temperatures in recent decades exceed the uncertainty range over the past 400 years (Oerlemans 2005).


Figure 5: Global mean temperature calculated form glaciers. The red vertical lines indicate uncertainty.

Of course, these examples only go back around 500 years - this doesn't even cover the Medieval Warm Period. When you combine all the various proxies, including ice cores, coral, lake sediments, glaciers, boreholes & stalagmites, it's possible to reconstruct Northern Hemisphere temperatures without tree-ring proxies going back 1,300 years (Mann 2008). The result is that temperatures in recent decades exceed the maximum proxy estimate (including uncertainty range) for the past 1,300 years. When you include tree-ring data, the same result holds for the past 1,700 years.


Figure 6: Composite Northern Hemisphere land and land plus ocean temperature reconstructions and estimated 95% confidence intervals. Shown for comparison are published Northern Hemisphere reconstructions (Mann 2008).

Paleoclimatology draws upon a range of proxies and methodologies to calculate past temperatures. This allows independent confirmation of the basic hockey stick result: that the past few decades are the hottest in the past 1,300 years.

All original material is copyright of its author. Fair use permitted. Contact via comment. Unless indicated otherwise, all internet links accessed at time of writing. Nothing here should be taken as personal advice, financial or otherwise. No liability is accepted for third-party content, whether incorporated in or linked to this blog; or for unintentional error and inaccuracy. The blog author may have, or intend to change, a personal position in any stock or other kind of investment mentioned.

Wednesday, October 02, 2013

The flash revolution of 2 October 2013

6pm: Following broadcast news reports of Mr Cameron's speech declaring Britain "a land of opportunity", 26 million employees immediately resign to become self-employed and plan to pay no tax for the next two years as they make the usual losses while creating their multinational businesses.

6.15 pm: Speaking from a television studio temporarily manned by police and Army personnel, the Prime Minster issues a correction, saying "We didn't mean you. Any of you. Now get back to work."

All original material is copyright of its author. Fair use permitted. Contact via comment. Unless indicated otherwise, all internet links accessed at time of writing. Nothing here should be taken as personal advice, financial or otherwise. No liability is accepted for third-party content, whether incorporated in or linked to this blog; or for unintentional error and inaccuracy. The blog author may have, or intend to change, a personal position in any stock or other kind of investment mentioned.

John Cook's Climate Change Mythbusters 15

This is part of a series reposting material from John Cook's Skeptical Science website. Although he is a physicist rather than a specialist in climate science, he is a convinced "global warmist" and tries to rebut frequently-raised objections to the theory. However, it is always possible to question the data (e.g. this valuable note about measuring temperature) and the line of argument. Please help advance the debate - with facts and logic.
_______________________________________________________

Ocean acidification: global warming's evil twin

What The Science Says:
Ocean acidification threatens entire marine food chains.
Climate Myth: Ocean acidification isn't serious
'Our harmless emissions of trifling quantities of carbon dioxide cannot possibly acidify the oceans. Paper after paper after learned paper in the peer-reviewed literature makes that quite plain. Idso cites some 150 scientific sources, nearly all of them providing hard evidence, by measurement and experiment, that there is no basis for imagining that we can acidify the oceans to any extent large enough to be measured even by the most sensitive instruments.' (Christopher Monckton)
Not all of the CO2 emitted by human industrial activities remains in the atmosphere. Between 25% and 50% of these emissions over the industrial period have been absorbed by the world’s oceans, preventing atmospheric CO2 buildup from being much, much worse.

But this atmospheric benefit comes at a considerable price.

As ocean waters absorb CO2 they become more acidic. This does not mean the oceans will become acid. Ocean life can be sensitive to slight changes in pH levels, and any drop in pH is an increase in acidity, even in an alkaline environment.

The acidity of global surface waters has increased by 30% in just the last 200 years. This rate of acidification is projected through the end of the century to accelerate even further with potentially catastrophic impacts to marine ecosystems.

Endorsed by seventy academies of science from around the world, a June 2009 statement from the InterAcademy Panel on International Issues (IAP) stated the following.
"The current rate of change is much more rapid than during any event over the last 65 million years. These changes in ocean chemistry are irreversible for many thousands of years, and the biological consequences could last much longer."

- The InterAcademy Panel, June 1, 2009

As surface waters become more acidic, it becomes more difficult for marine life like corals and shellfish to form the hard shells necessary for their survival, and coral reefs provide a home for more than 25% of all oceanic species. Tiny creatures called pteropods located at the base of many oceanic food chains can also be seriously impacted. The degradation of these species at the foundation of marine ecosystems could lead to the collapse of these environments with devastating implications to millions of people in the human populations that rely on them.

The IAP also stated that, if atmospheric CO2 were to reach 550 parts per million (ppm) along its current rapid ascent from its pre-industrial level of 280 ppm, coral reefs around the globe could be dissolving.

Oceanic species threatened by acidification




All original material is copyright of its author. Fair use permitted. Contact via comment. Unless indicated otherwise, all internet links accessed at time of writing. Nothing here should be taken as personal advice, financial or otherwise. No liability is accepted for third-party content, whether incorporated in or linked to this blog; or for unintentional error and inaccuracy. The blog author may have, or intend to change, a personal position in any stock or other kind of investment mentioned.

Can we escape?

Michael Snyder has written a good piece on waste ("About 40 Percent Of All Food In The United States Is Thrown In The Garbage", 1 October). But as one of his sources makes clear, something like that percentage starts as garbage:

The food I sell is not healthy, by any stretch. I sell potato chips, candy bars, bread, canned food, ice cream, soda, packaged meat, cigarettes and alcohol. I noticed quickly that a common ingredient of most of the foods is sugar and grains. Sugar and grains are easy to grow and produce cheaply and are used as fillers in processed food to cut cost and mask the taste of other questionable ingredients. Grains work in conjunction with sugars to inflame the body and compromise the immune system. Grains and sugars also have no nutritional value besides calories, so on top of inflaming the body; they do not provide the sustenance the body needs to survive. As the functions of the body require these nutrients the diet lacks, the body sucks these minerals from the bones, teeth and brain. Bone loss, and tooth decay and decreased brain function are the unfortunate symptoms of malnutrition. The poorest of the customers I serve are also the sickest. I have witnessed toothless mouths in the young and old. Mental retardation is also a common trait among many of them. I have even witnessed one unfortunate woman whose skin was a pale green color. These people are dying a slow starvation and they don’t even know it.

I think all this is connected to what Marxists call "reification", the process whereby a need or function becomes institutionalised and then the agenda is driven by that institution's instinct to survive and thrive. In this case, the manufacturer's need to widen profit margins by using cheap ingredients, and the supermarket's need to have products with a long shelf life, so skewing them towards sugar, salt and other preservatives.

Food, health, education, crime prevention, entertainment, government - almost all of it comes in somebody else's box.

The case for freedom is sometimes overstated. We give up a lot of freedom for an easy, comfortable life. But when the institutions become toxic, we begin to think like Huck Finn:

I reckon I got to light out for the territory ahead of the rest, because Aunt Sally she's going to adopt me and sivilize me, and I can't stand it. I been there before.

Even the wrapper is useful. Pic source.

All original material is copyright of its author. Fair use permitted. Contact via comment. Unless indicated otherwise, all internet links accessed at time of writing. Nothing here should be taken as personal advice, financial or otherwise. No liability is accepted for third-party content, whether incorporated in or linked to this blog; or for unintentional error and inaccuracy. The blog author may have, or intend to change, a personal position in any stock or other kind of investment mentioned.

Tuesday, October 01, 2013

Sunday in London

£2 to park all day at Solihull station, 102 minutes to Marylebone, then half an hour to South Kensington Tube station, where there's a feast of museums, and, like a trip through Gringotts' vaults, you go straight from the ticket barrier into the tiled tunnel that connects them.

The Victoria & Albert's  tea room is a sensual, secular temple - more stained glass, ceramic workman's mottos and erotic goddess-like sculpture than you can take in at one go. Someday we'll do lunch there - the hot food looks top quality - but this time coffee and a scone were enough. Then up to Level 6, passing some absorbing interactive displays in the wood furniture section and a richly ornamented virginal, to arrive at the ceramics rooms. Some things were familiar - De Morgan tiles, Wedgwood, the 1957 design Homemaker plates (we have a well-used couple), some deceptively modern - a tiny, vigorous vase in the shape of a ram's head that looked postwar but was classical Greek (400 - 300 BC), and the one that astonished me this time was a huge blue alien - an ancient Egyptian "was-sceptre" seven feet high and 3,500 years old:

V&A link
You can't read a library, so we broke off and went to the Natural History Museum. Sunday being sprog day, the place was packed with children seeking dinosaurs, and they were rewarded from the off:
 
Pic source
The architecture alone is worth a visit, built as though it takes a delight in itself and the staircases could move about as in Hogwarts. Sit by the loos and look through an archway into the main hall, catching the slant of a stair and a brick-pilastered gallery hinting at more space beyond, in the way great buildings have that make them seem bigger than the open air.

The mammal collection was full of things that were safely stuffed, as I suppose we are these days. Standing by hippos and polar bears, I thought if it's them or me there's no question. And the blue whale made the neighbouring elephant look undersized and vulnerable: just a good mouthful.

Undraped, the walls echo so that on a busy day you can't really follow the talking displays, and for a venue so attractive to the young there doesn't seem to be enough to engage them actively - unlike at Bristol Zoo, which has put a great deal of thought and imagination into making things for children to poke their heads or fold their bodies in, clamber on, push, turn, squirt (there's a telltale puddle by the lion's-backside board, but kids don't anticipate) and so on. Still, they'll have enjoyed their dinos. We shoved a fiver into the perspex donation box and left.

And on up the Brompton Road, past the gloriously-interiored Oratory to turn right into Beauchamp Place for the Maroush Bakehouse, one of a chain of Lebanese restaurants.

Baker Street, the Edgware Road, Knightsbridge, the Temple area - Lebanese is popping up everywhere. Delicate spicing, deliciously fresh salads, mint tea, Mediterranean-style coffee and shisha pipes in many places, the odd piece of hot charcoal falling off the tinfoil and scorching the tablecloth as the girls suck and giggle. Organic-shaped pots, jugs and lamps, arabesque music, modern Dubai-style consumerist TV, all good for an hour's worth of playing the Oriental.

This Maroush didn't play up to the hokum smokum, but the food was excellent. We went for the set meal for two and could have fed at least another person, while an Australian couple in sports gear ("size matters" said the stripe on his sweatpants) talked business strategy on the next table and their neighbours examined kid pictures on granny's boasting-iPhone. Anyway, stuffed again, but in a good way this time. They do breakfast too, and the bakery section does takeaway; we like.

And so to walk it off, passing Harrod's (open till 6 on Sunday and the Food Hall is another place of worship, packed with Arabs and Japanese) and Knightsbridge Tube Station (which may well have been built specifically to exit smack by the store). We cut left a couple of times to enter Hyde Park and head north across its expanse, crossing an earthen ride and skirting the Serpentine (where Shelley's wife drowned herself) to pause at Speaker's Corner. There, a black man in a police sergeant's jacket and jackboots was using an England flag as a pointer as he listed races that he alleged "they don't like"; his patter palled with repetition, so we walked on past various Christian evangelists and the horse's head sculpture that I thought was a reference to the 1982 bombings, but not necessarily so, through Marble Arch and across the road island - where banner-holding Egyptians were protesting to the traffic against the military government - to Marylebone, and home.

 
Pic source
All original material is copyright of its author. Fair use permitted. Contact via comment. Unless indicated otherwise, all internet links accessed at time of writing. Nothing here should be taken as personal advice, financial or otherwise. No liability is accepted for third-party content, whether incorporated in or linked to this blog; or for unintentional error and inaccuracy. The blog author may have, or intend to change, a personal position in any stock or other kind of investment mentioned.

John Cook's Climate Change Mythbusters 14

This is part of a series reposting material from John Cook's Skeptical Science website. Although he is a physicist rather than a specialist in climate science, he is a convinced "global warmist" and tries to rebut frequently-raised objections to the theory. However, it is always possible to question the data (e.g. this valuable note about measuring temperature) and the line of argument. Please help advance the debate - with facts and logic.
_______________________________________________________

Are we heading into a new Ice Age?

What The Science Says:
Worry about global warming impacts in the next 100 years, not an ice age in over 10,000 years.
Climate Myth: We're heading into an ice age
"One day you'll wake up - or you won't wake up, rather - buried beneath nine stories of snow. It's all part of a dependable, predictable cycle, a natural cycle that returns like clockwork every 11,500 years. And since the last ice age ended almost exactly 11,500 years ago…" (Ice Age Now)
According to ice cores from Antarctica, the past 400,000 years have been dominated by glacials, also known as ice ages, that last about 100,000. These glacials have been punctuated by interglacials, short warm periods which typically last 11,500 years. Figure 1 below shows how temperatures in Antarctica changed over this period. Because our current interglacial (the Holocene) has already lasted approximately 12,000 years, it has led some to claim that a new ice age is imminent. Is this a valid claim?



Figure 1: Temperature change at Vostok, Antarctica (Petit 2000). The timing of warmer interglacials is highlighted in green; our current interglacial, the Holocene, is the one on the far right of the graph.

To answer this question, it is necessary to understand what has caused the shifts between ice ages and interglacials during this period. The cycle appears to be a response to changes in the Earth’s orbit and tilt, which affect the amount of summer sunlight reaching the northern hemisphere. When this amount declines, the rate of summer melt declines and the ice sheets begin to grow. In turn, this increases the amount of sunlight reflected back into space, increasing (or amplifying) the cooling trend. Eventually a new ice age emerges and lasts for about 100,000 years.

So what are today’s conditions like? Changes in both the orbit and tilt of the Earth do indeed indicate that the Earth should be cooling. However, two reasons explain why an ice age is unlikely:
  1. These two factors, orbit and tilt, are weak and are not acting within the same timescale – they are out of phase by about 10,000 years. This means that their combined effect would probably be too weak to trigger an ice age. You have to go back 430,000 years to find an interglacial with similar conditions, and this interglacial lasted about 30,000 years.
  2. The warming effect from CO2 and other greenhouse gases is greater than the cooling effect expected from natural factors. Without human interference, the Earth’s orbit and tilt, a slight decline in solar output since the 1950s and volcanic activity would have led to global cooling. Yet global temperatures are definitely on the rise.
It can therefore be concluded that with CO2 concentrations set to continue to rise, a return to ice age conditions seems very unlikely. Instead, temperatures are increasing and this increase may come at a considerable cost with few or no benefits.

All original material is copyright of its author. Fair use permitted. Contact via comment. Unless indicated otherwise, all internet links accessed at time of writing. Nothing here should be taken as personal advice, financial or otherwise. No liability is accepted for third-party content, whether incorporated in or linked to this blog; or for unintentional error and inaccuracy. The blog author may have, or intend to change, a personal position in any stock or other kind of investment mentioned.