Time to reconnect with New Zealand. I’m taking my summer break from blogging. Over the next few days, I’ll be on a boat (the one in the picture) tootling around the Abel Tasman, and therefore out of touch with the world. Bryan will be your host until I get back to my desk at the end of next week. Be gentle with him, please…
Category: environment and ecology
La-la Land again: Jim Hopkins gets it wrong
It must be sceptic idiot week at the Herald. Not content with allowing Garth George to make stuff up, today they unleash that mighty wit (or should that be twit?) Jim Hopkins, who has been reading the Daily Mail‘s daft coverage of a BBC interview with Phil Jones, the man at the centre of the beat-up over stolen emails:
Professor Jones discussed many things with the BBC, including the trouble he has “keeping track” of information, but the professorial concession the Daily Mail pounced upon – and our media ignored – was this: He said that for the past 15 years there has been “no statistically significant” warming. “No statistically significant warming”. None. It’s not happening. Since 1995, we ain’t got hotter. And that’s not the sceptics speaking. That’s from a man who garnered $22 million to prove we were getting warmer. Much warmer, worryingly warmer, “Lucy Lawless was right” warmer. But now he says we’re not. And haven’t been for 15 years.
I suppose we can’t expect a newspaper columnist and professional funny man to understand statistical concepts. Jones did not say that there had been no warming for 15 years. He said that the warming trend over the last 15 years just fails to meet one test for statistical significance. Here’s Jones in full:
Do you agree that from 1995 to the present there has been no statistically-significant global warming?
Yes, but only just. I also calculated the trend for the period 1995 to 2009. This trend (0.12C per decade) is positive, but not significant at the 95% significance level. The positive trend is quite close to the significance level. Achieving statistical significance in scientific terms is much more likely for longer periods, and much less likely for shorter periods. [My emphasis].
The Daily Mail misunderstood and/or misrepresented what Jones told the BBC — and that’s been extensively covered on the web. Hopkins is happy to repeat that misinformation without checking his facts. Perhaps he doesn’t understand how to use Google? More coverage of Mailgate at Deltoid, In It For The Gold, Real Climate, and for a full explanation of what statistical significance means in this context, Tamino has an excellent article here. Meanwhile, Jim should stick to his knitting instead of repeating tabloid lies from Britain.
A visitor from La-la Land: Garth George gets it wrong (again)
I suppose it was inevitable that the feeding frenzy about various “gates” in the British press would attract the attention of the wise old man of Rotorua, Garth George. In today’s Herald he emerges from his sulphurous lair to add his muted sqeak to the hubbub. It’s not much different to his last few columns on the subject, though the borrowing of material is perhaps a little less obvious. He cites his source (a horrendously bad piece by Jonathan Leake in the Sunday Times) and does a proper re-write rather than just quote the whole thing verbatim. But he adds some flourishes of his own:
Their concern – as it is with the data provided by our own National Institute of Water and Atmospheric Research (Niwa) – is about the thousands of weather stations around the world which have been used to collect temperature data over the past 150 years.
These stations, they believe, have been seriously compromised by factors such as urbanisation, changes in land use and, in many cases, being moved from site to site. This, of course, is the charge that has long been levelled at Niwa by a significant section of New Zealand’s scientific community.
Rubbish, Garth. What “significant section” would that be? The NZ CSC and Richard Treadgold’s anonymous team of “scientists”? Perhaps you counted that noted environmental scientist Rodney Hide. De Freitas and De Lange? Fringe figures of no great academic standing. You just made it up, didn’t you? Interviewed your typewriter and polled your patio pot plants, to lend false weight to a ridiculous smear campaign.
The rest of Garth’s piece repeats the main points of Leake’s article (handily debunked at Deltoid: keep an eye out for Tim’s Leakegate posts), but as he opened with some failed predictions from 1957, he closes with a prediction of his own:
So, just as Dr Kaplan’s predictions came to nought, so I believe will the scaremongering global warming predictions of today’s climate doomsayers. Perhaps 53 years from now someone will find an ancient copy of the Herald and laugh at the climate change paranoia which afflicted the world in 2010.
Of two things we can be sure: he will not be around to hear the laughter, and it will be Garth George they will be laughing at — if they’re not shedding tears of rage.
Pearced to the heart: Fred gets it wrong
I have been a reader of the Guardian newspaper for 55 years and was more than a little astonished when they ran a series of articles by prominent environmental journalist Fred Pearce on the stolen University of East Anglia emails. For that matter I was surprised that Fred Pearce wrote them. He is no climate change denialist, and makes it perfectly clear that the emails in no way alter the case that humans are warming the planet. But he seems to have taken them at the face value the hackers presumably hoped for, and drawn some unjustified and unfair conclusions. The Guardianobviously thought he was on to something significant. A “major investigation” they proclaimed, getting at the “real story”. Revelations and exposures abound.
Let’s take a closer look at one of the revelations. It’s an article claiming that the emails reveal “strenuous efforts by the mainstream climate scientists to do what outside observers would regard as censoring their critics”. It was the one chosen for inclusion in the latest Guardian Weekly. As a reader of that paper I’d been quietly hoping we’d be spared the sight of any of the articles, but there it was, on the science page, with the lurid headline “Research red in tooth and claw.”
Pearce claims that there have been obvious cracks in the peer-review system for years, mentioning an open letter from 14 stem cell researchers to journal editors to highlight their dissatisfaction with the process, alleging a small scientific clique is using peer review to block papers from other researchers.
From there he jumps to the emails, where he claims “many will see a similar pattern.” Phil Jones, as a top expert in his field, was regularly asked to review papers “and he sometimes wrote critical reviews that may have had the effect of blackballing papers criticising his work.”
Pearce quotes from a 2004 email in which Jones mentions that he had recently rejected two papers from people saying CRU (his climate research unit) has it wrong over Siberia. “If either appears I will be very surprised.” Pearce acknowledges that Jones doesn’t say why he rejected the papers (might it have been that they were poor science?). Pearce also doesn’t know what the papers were, but announces that the Guardian has established that one of them was probably from Lars Kamel, a Swedish astrophysicist who analysed temperature records from parts of southern Siberia and claimed to find much less warming than Jones.
Pearce admits that Kamel’s paper could be criticised as being slight and lacking in detail about its methods of analysis. However, he surmises, Jones would have known that Kamel called mainstream climate research “pseudo-science” and that publication of the article in a serious journal would have attracted the attention of professional climate sceptics. (Presumably suggesting that this would prejudice Jones in his estimation of the paper?) In spite of the paper’s inadequacy Pearce says that because it was a rare example of someone trying to replicate Jones’ analysis “some would have recommended its publication.”
So is Pearce suggesting that if a scientist of Jones’ stature considers papers to be lacking scientific rigour he shouldn’t say so, lest he might be instrumental in persuading an editor not to publish them? Or is he suggesting that Jones deliberately sets out to prevent publication of anything which questions his own position? He hardly makes himself clear, but succeeds, on the basis of much conjecture, in casting a slur on Jones’ integrity.
He later makes a good deal of Jones’ “harsh criticism” of the journal Climate Research for publishing papers he “disagreed with”. It seems to me that Jones and others had every reason for their criticism. Chris de Freitas, the editor responsible for publishing the Soon and Baliunas paper, is our well known crusading climate change denier. He constantly seeks and gains publicity for standard denialist claims (one might not unreasonably say lies) that increases in carbon dioxide don’t dangerously change the climate, that there is no acceleration in sea level rise, that climate scientists exaggerate for the sake of money, and so on. If he accepted the paper against the advice of four reviewers there is every reason to suspect the quality of the journal’s editorship. But no, Pearce manages to imply that Jones and Mann did something improper and damaging to the publication of scientific papers.
It’s one thing for Pearce to discuss the general question of the mechanics of peer review, but quite another to use Jones as an example of the abuse of the system. That’s a rush to judgment which I find hard to believe the Guardian allowed.
I was pleased to discover that the Guardian at least invited climate scientist Gavin Schmidt of NASA to comment on Pearce’s article. If you click on the highlighted yellow sections of the article (linked to above) you can see his annotations. He roundly rejects much of what Pearce has to say. I’m no scientist, but it seemed apparent to me as a general reader that Pearce was pushing the email material way beyond anything it justified. It was good to have that view confirmed by a working scientist.
I’m left wondering why this sort of “investigation” was ever supported by the Guardian. It pre-empts the independent review the University has arranged. It treats stolen and possibly selected emails as evidence, though to do so it has to make all sorts of assumptions about what the authors might have meant. It is manifestly unjust to the scientists concerned and trivialises their work.
Note: Jones has recently been interviewed by Nature and although there are aspects of the Climategate allegations that he is not able to comment on he defends himself against some of the accusations made against his work.
Tipping and other points
During the Copenhagen kerfuffle a lot of interesting stuff hit the web: here’s something that deserves a bit more air – a Proceedings of the National Academy of Science (PNAS) special issue on tipping elements in the earth system, edited by John Schellnhuber, the director of the Potsdam Institute for Climate Impact Research in Germany.
Tipping elements (or points, as Malcolm Gladwell would have them) are changes that once started take on a life of their own, and can’t easily be returned to their original state. In the climate system that might be the rapid loss of an ice sheet in a few decades or hundreds of years, while regrowing it might take many thousands. The PNAS special issue deals with nine: dust production in the Bodélé Depression in Chad, ENSO, Arctic sea ice and ice sheets, the Atlantic Meridional Overturning Circulation, deep ocean hydrates (not shallow sea bed, Siberian methane) — David Archer dubs them a “slow tipping point”, the Amazon rainforest (no “Amazongate” here, just a confirmation that concern is justified), monsoons, oceans, and policy responses to the climate challenge. And the best thing is that all the articles are available online, free (click on the link above). Schellnhuber contributes an introduction, and the Potsdam press release also provides a good overview. For some introductory thoughts, check out Tim Lenton’s discussion here.
Another recent example of a real tipping point is the Pine Island Glacier in West Antarctica. Recent modelling suggests that the glacier’s grounding line retreated beyond a ridge in 1996, and is now free to retreat by several hundred kilometres inland. This could happen in a hundred years and result in the loss of half of the ice in the glacier — enough to raise sea level by 24cm. New Scientist reports:
Observations already show that the model severely underestimates the rate at which PIG’s grounding line is retreating, says Katz. “Ours is a simple model of an ice sheet that neglects some important physics,” says Katz. “The take-home message is that we should be concerned about tipping points in West Antarctica and we should do a lot more work to investigate,” he says.
Amen to that.