I am not a physicist or a chemist. I am a much-published psychologist with an interest in the sociology of knowledge. So I see my role in reporting on scientific questions outside my own field as being simply to draw attention to the full range of available information on the question concerned. Most scientists are probably aware that there is a "confirmatory bias" towards accepted theories in what is published in the academic journals so particular attention to non-confirmatory findings is simply good science.
But although I rarely comment personally in fields in which I am not expert, I am always, of course, delighted to point to failures in logic and it seems to me that the "Greenie" interpretation of the recent arctic event is very suspect from that point of view.
Why would a large bit of the Arctic ice shelf break off and fall into the sea? If global warming is happening, it should surely just shrink and melt away, with no reason to lose contact with the land. On the other hand, if the ice-shelf is EXPANDING then it should eventually get so big that it expands beyond the boundaries of the land -- causing the bit that is no longer supported by the land to fall into the sea.
So the recent event points overwhelmingly to an EXPANDING ice mass in that area of the Arctic, not a shrinking one -- which is what the Greenies would have you believe. Pesky eh?
I will leave it to others to comment on the other misrepresentations in the article below
A vast ice shelf in the Canadian Arctic has broken up, a further sign of the astonishing rate at which polar ice is now melting because of global warming. The Ayles ice shelf, more than 40 square miles in extent - over five times the size of central London - has broken clear from the coast of Ellesmere Island, about 500 miles south of the North Pole in the Canadian Arctic, it emerged yesterday. The broken shelf has formed an ice island, in what a leading scientist described as a "dramatic and disturbing event", citing climate change as the cause.
The news caps a dramatic year of discovery about just how quickly the polar ice is disappearing. It comes as America's leading climate scientist, James Hansen, warns in today's Independent that the Earth is being turned into "a different planet" because of the continuing increase in man-made emissions of greenhouse gases.
The break-up of the Ayles shelf occurred 16 months ago, in an area so remote it was not at first detected. "This is a dramatic and disturbing event," said Professor Warwick Vincent of Laval University in Quebec City. "It shows that we are losing remarkable features of the Canadian North that have been in place for many thousands of years."Ice shelves float on the sea, but are connected to land (as opposed to ice sheets, which are wholly land-based). In the past five years, several ice shelves along the fringes of the Antarctic peninsula have started to become unstable or break up. The most spectacular was the 2002 collapse of the Larsen B ice shelf, the size of Luxembourg.
Until now, there had not been a similar event among the six major shelves remaining in Canada's Arctic, which are packed with ancient ice that is more than 3,000 years old. Professor Vincent, who studies Arctic ecosystems, travelled to the newly formed ice island and was amazed at what he saw. "It's like a cruise missile has come down and hit the ice shelf," he said. "Unusually warm temperatures definitely played a major role. It is consistent with climate change." The collapse was picked up by the Canadian Ice Service, which notified Luke Copland, head of the new global ice laboratory at the University of Ottawa. Using US and Canadian satellite images, as well as seismic data - the event registered on earthquake monitors more than 150 miles away - Professor Copland discovered that the ice shelf collapsed in the early afternoon of 13 August 2005. Scientists were surprised at the speed of the event, Professor Copland said - it took less than an hour.
There have already been several disturbing indications this year that the Arctic ice is melting at a much faster rate than expected. In September, two Nasa reports showed a great surge in the disappearance of the winter sea ice over the past two years, with an area the size of Turkey disappearing in 12 months.
Note that the article below points to a COOLING arctic, which again suggests that the ice-shelf breakoff is due to an EXPANDING ice-mass, not a shrinking or melting one. I hope to have more to say about sea-ice versus land-based ice tomorrow
Because global warming is a religious belief rather than a scientific one, however, Greenies do from time to time accept that the ice-mass in places like Greenland and the Antarctic is expanding. They say that global warming produces more evaporation off the ocean and hence more snowfall and hence ice buildup. NO evidence can count against their belief. The global warming belief thus fails the test of falsifiability, which is basic not only to scientific statements but to empirical statements generally. The global warming belief is thus a theological, not a scientific one -- on a par with the Christian ability to explain the existence of evil despite their God being omnipotent and benevolent
Greenland has cooled down since the 1930s
Post lifted from Lubos Motl
Greenland is one of the regions that play a crucial role in the global warming theory. The existing climate models predict an amplified warming for Greenland and other high-latitude areas. Moreover, these regions that are far away from the equator should also get more warming because of the vegetation feedback mechanism. Also, we frequently read that the Greenland's glaciers are reatreating: we're doomed. On the other hand, the name of Greenland suggests that it could have been green in the past. Who is right: hysterical journalists on one side or historians and linguists on the other side?
There exists a better method to decide similar questions than both hysterical journalism as well as history: the method is called science. The following 2006 paper in Journal of Geophysical Research
by B. Vinther, K. Andersen, P. Jones, K. Briffa, and J. Cappelen has looked at the available data and reconstructed the temperatures for winters from 1829 to 2005 and summers from 1855 to 2005.
The results? The warmest winter at some places was the winter of 1917. The authors do not indicate whether the reason was Lenin and his Great October Socialist Revolution. ;-)
The warmest year in all of Greenland was 1941 while the 1930s and 1940s were the warmest decades (see page 8 of 13 in the PDF file above). The coldest year was 1863 while the 1810s were the coldest decade, largely because of two large volcanic eruptions that took place in this period.
Well, the global warming theory and the existing climate models seem to be in trouble because of these observations (and others). Is there an explanation that would be consistent with the climate change paradigm? You bet.
The anthropogenic explanation of the nicely cool decade of the 1810s relies on some of the successful actions of the Luddites who were destroying the textile machines between 1811 and 1816. Once these heroes and predecessors of the contemporary warriors against the climate change were beaten up by the evil capitalists, a catastrophic period of warming started. The only glimpse of hope was the coldest year of 1863 when slavery was abolished and the former slaves didn't have to breath so much and emit so much carbon dioxide. Finally, this cataclysmic period of warming ended around 1941 when the Nazi soldiers were freezing near Moscow which much reduced the expansion and the CO2 emissions of the Third Reich. ;-)
This story sounds great but I will stick with the volcanos, solar activity, and other natural phenomena that seem to explain the observed graphs more naturally.
More comments at WorldClimateReport. A critical perspective on the article by Vinther et al. is offered by Steve McIntyre who argues that they again extract low-frequency signals out of high-frequency patterns which is no good. The paper by Vinther et al. is also discussed by RealClimate from an alarmist perspective.
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