Friday, July 27, 2007
Watching the documentary, I felt sick. While the movie was obviously intended to "refute" the basic science behind anthropogenic global warming, and as such was obviously intended to be a "skeptical" attack of the "dogmatic" establishment, it missed the fundamental point of skepticism: skepticism is not simply a position, but is a method. And the method, like any method concerned with interrogation, should be robust and should aim at getting at the truth.
Many of the flaws (yes, there were many flaws) of the documentary stemmed from the fact that it simply did not interrogate the other side well, and it certainly was not aimed at getting at the truth of the matter (as a foray into Jones' interview with Durkin will show). That is, it's method was flawed. In this way, it's skepticism was not good at all. And in this way, the position that Durkin took was not very skeptical (despite that fact that it was trying to raise doubt). Yet, many viewers of this documentary see it as skeptical simply because it raises its fist and goes against mainstream scientific thought. But so do many aspects of religion and junk science, but we wouldn't call them skeptical, would we?
Just because a position seems to be the result of skeptical inquiry doesn't make it skeptical.
Even Tony Jones fell into the skepticism as position trap when he seemed baffled by Dr. David Karoly's (IPCC contributing scientist) assertion that he was "still" a global warming skeptic. The apparent contradiction is solved when you see that, as a scientist, Karoly can adhere to the mainstream view but still approach it with caution. And indeed, he can be skeptical of other global warming theories - like the solar-forcing hypothesis that Durkin, amongst others, have put forth. The apparent contradiction further disintegrates when you consider that Krowley (and many other proponents of the mainstream view) approach the issue with the correct method, which includes getting the facts correct and interpreting competing arguments charitably, something that Durkin - the so called "skeptic" - in many cases didn't even bother to do.
No, a skeptical position is built upon a logically robust and reasonably robust method. Nor are skeptical positions reserved only for those that are outside the mainstream; indeed, skepticiam has usually been associated with the refutation of pet theories or pseudo-scientific views, most of which are usually in the minority.
Wednesday, July 25, 2007
There are, however, some interesting points worth taking seriously. Taylor makes the point that Gore's implied linkage between tornadoes and global warming is faulty. Whether or not these is indeed any research which shows a link between tornado activity and global warming, Gore's point on this matter was intrinsically weak: he showed no evidence for his argument anyway.
Actually, the lack of supporting argument was one of my main problems with the film: it showed a lot of scientific conclusions, but never showed why things work the way they do, or why certain data counts as evidence for this and nor for that, and so on. When I first viewed the film, I remarked that while the message was delivered powerfully, the film's influence as a simple summary of the main issues was never properly clarified. In any summary, the references are left for later, the digging left as an addendum. In my opinion, some people aren't smart enough to realize that a documentary cannot hope to convey all of the information and nuance of its issue of choice; however, the movie's promotion tended to give to viewer the impression that it was the last word, and that it is time to act - not to do more research on your own. While this does not, in principle, invalidate the main conclusions of the film, it does speak to weakness of the film as a presentation and summary. Or, maybe, it speaks to the idea of a science-based documentary filmmaking in general.
Taylor notes that, contrary to what Gore claims (and I can't remember what Gore claimed) about drying regions of Africa, certain regions of the southern Sahara and the Sahel have seen a retreat in the extent of the desert, and that the area has been wetter than previous years, according to research reported on in NewScientist. Setting aside the fact that the article is not up to date (it's from 2002), and setting aside the fact that the article did not attribute African desert retreat to, say, a global cooling, NewScientist recently published a piece claiming just the opposite of what Taylor cites: African semi-arid regions are becoming much drier. It is clear that there is too much nuance in this issue to relegate discussion to generalizations about what the climate is doing or will do, although pure and unfiltered research can give us a glimpse of what trends are clear and what this means in regards to global warming.
This is yet another aspect of Gore's film that probably could have been better explained, and the dynamics between glacial trends and climate trends elucidated. (Then again, consider the difficulty in keeping the film nuanced.) The melting of Kilimanjaro and its attribution to global warming is indeed controversial - the paper that Taylor cites is valid, but there is other research and argument in favour for the global warming-Mt. Kilimanjaro link. I wonder, however, if Taylor sees this as evidence that the globe is not warming, which is most certainly is, assuming the data is correct.
Wednesday, July 11, 2007
In his article, James M. Taylor quotes a paper from the esteemed Journal of Climate, which is intended to be shown as evidence that Gore is incorrect in his claims regarding Himalayan glaciers. However, foraging through the actual paper, the purported quote is not a quote at all - none of its words and phrases, nor the entire text itself, can be found amongst its content.
You can view the actual paper here, and then compare notes with Taylor's article. On a related note, the language used within the 'quote' was itself suggestive that it was made up. There is simply no way that a paper describing the dynamics and processes involved in Himalayan glacier retreat and advance - a paper that did not take any substantive view on alarmism or hysteria - would use language with the words "alarmists" or 'confounded alarmists'. The business of the paper is to present real and serious scientific work, and not to foray into the political or the psychological attributes of certain locuters. In other words, the language of the quote was fishy, and it needed to be put under the skeptical glasses.
Friday, July 6, 2007
A Cooling Ice Sheet in Antarctica? Which part?
It is not entirely clear where Taylor wants to go with this one. It seems as if he is claiming that Gore was wrong to be talking about melting in the Antarctic at all. He disputes Gore on three fronts: that Antarctica is melting, that it has warmed, and that it will melt much in the future. But, in fact, Gore kept most of his discussion to the West Antarctic ice sheet, and not Antarctica as a whole (which has indeed cooled somewhat). The Western ice sheet is indeed melting in certain parts. Any foray into the data will show you that, while most of Antarctica has cooled (or has not warmed), the West ice sheet has experienced warming. Taylor cites the IPCC’s statement that it does not expect Antarctica to melt much in the 21st century, in hopes (I think) of showing that Gore was wrong to say that it would melt quite a bit in the 21st century. The only point to keep in mind, of course, is that Gore did not give any predictions as to how much or when the ice would melt in Antarctica.
Growing glaciers in the Himalayas?
Onto the point about the Himalayas. Taylor simply gets wrong the main conclusions of the Journal of Climate paper he cites, and I fear (although I don’t know) he may have made up the last quote he claims to have taken from it. Whereas Taylor implies that this research shows that glacier growth in the Himalayas refutes claims that they are shrinking. The Journal of Climate paper, instead of showing that all of the Himalayan glaciers are growing - and much less than refuting global warming claims - said this:
“The observed downward trend in summer temperature and runoff is consistent with the observed thickening and expansion of Karakoram glaciers, in contrast to widespread decay and retreat in the eastern Himalayas. This suggests that the western Himalayas are showing a different response to global warming than other parts of the globe.” (Abstract)
If I remember correctly, Gore kept his discussion to the eastern glaciers located closer to China and India; it was around this point in Gore’s discussion that he turned to the potential effects of lowering glacial water runoff in these regions. It probably would have been important for him to include the western glaciers in order to illustrate that climate change is complex. But insofar Taylor is concerned, global warming claims are thrown into question by this research. My question – and indeed every skeptic’s question – should be: how?
I’ll write a little more on this article later, but what I have presented so far is, I hope, enough to show you that careful reading and fact checking are indispensable parts of any critical appraisal of an article – especially an article reporting on a very complicated and nuanced scientific issue such as climate change. However, Gore is not squeaky clean on this issue. Yet, I think that we can diagnose, with increasing confidence, that this article as just another symptom of the “decline of reason” that Gore talks about in Reason.
Look out for Part 2 of this post, which will be put up shortly.
Wednesday, July 4, 2007
This blog was created in response to a growing public fascination with skeptical thought, and especially its growing influence in lay and scientific discussions about climate change. Usually, it is invoked as a response to the mainstream view that global warming is happening and that it is human caused - but it is often misused and abused. Often, the skepticism is misplaced, misapplied, or is thought to be a stance that only a dissenter can take. For instance, when debating with someone over some of the scientific evidence in favour of anthropogenic global warming (AGW, or man-made global warming, in other words), I was accused of being a religious cultist who doesn't engage in any skeptical thought at all, simply because I said that the evidence was strong and that it counted in favour of AGW!
In fact, skeptics can take the prevalent view, and have taken it before (see proponents of that ever prevalent view: Darwin's theory of evolution by natural selection). Skepticism isn't neccessarily the domain of the maverick, and it certainly isn't the domain of the bad reasoner who can't help but engage in fallacious thought. Yet, many in either group believe that skepticism is theirs, and theirs alone, to use at will and without the need for discipline that accompanies it. In other words, they have commandeered it.