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Old 03-11-2007, 08:47 AM   #83
Dr.Zoidberg
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Nice try dude, but didn´t you forget something?

Here the rest of the article:

Quote:
... "Scientific knowledge has demonstrated that Inuit knowledge was right," said Mr Taylor.
While fellow scientists have accepted Mr Taylor's findings, critics point out that his study was commissioned by the Inuit-dominated government of Nunavit.
Critics claim the government has an agenda to encourage polar bear hunting and keep the animals off the endangered species list.
In small Inuit communities, hunters kill bears that wander too close to human settlements and, in this particular region, they are licensed to kill six polar bears a year.
Polar bear experts said that numbers had increased not because of climate change but due to the efforts of conservationists.
The battle to ban the hunting of Harp seal pups has meant the seal population has soared - boosting the bears' food supply.
At the same time, fewer seal hunters are around to hunt bears.
"I don't think there is any question polar bears are in danger from global warming," said Andrew Derocher of the World Conservation Union, and a professor of biological sciences at the University of Alberta in Edmonton. "People who deny that have a clear interest in hunting bears."
Bear numbers on the west coast of Hudson's Bay had shrunk by 22 per cent over the past decade, he said.
"They are declining due to global warming and changes in when the ice freezes and melts in Hudson's Bay," he added. He and other scientists in his group are concerned that the retreating ice in the Arctic may pose a danger to future generations of polar bears because of 'habitat loss'. "The critical problem is the sea ice is changing. "We're looking ahead three generations, 30 to 50 years.
"To say that bear populations are growing in one area now is irrelevant."
However, Prof Derocher conceded that some polar bear-related evidence of the damaging effect of global warming was misplaced.
Contrary to concern over a celebrated photograph of a bear and its cub floating on a tiny iceberg, the animals often travel in that way, he said.
"Bears will often hang out on glacier ice or large pieces of multi-year ice," he said.
The state of Alaska yesterday questioned the scientific justification for proposals to add polar bears to the US endangered species list.
Tina Cunnings, a biologist attached to the Alaskan government, questioned whether they needed sea ice to survive, saying they could adapt to hunt on land and find alternative food sources to seals.
Prof Derocher said the theory was "absolutely fanciful".


Now to the coherences between melting polar-ice and drought:

1. The polar-ice has a thickness of up to 4,5 km. If the ice melts, gigantic quantities of freshwater will get into the seas. On the basis of the different physical properties of freshwater and saltwater (density, heat-capacity), a change of the ocean currents could occur, in consequence of a postpone of the climatic zones and the distribution of precipitation. I.e. strongly populated areas have to fight with droughts all at once, in formerly dry areas, there suddenly is rain…

2. In order to melt ice you need about 80 times more energy than to heat up the same amount of water by 1°C! The so called arctic ocean circulation develops a 1.000 km wide belt of ice every winter. Every year if this ice-belt thaws again, gigantic quantities of heat energy will be degraded. If this ocean current collapses, considerably less energy can be reduced. I.e. the climate will further warming up. Additionally the sea is heating up in the course of this process, which once more could lead to a change of ocean currents.

3. By the unfreezing of the permafrost of the Tundra, gigantic quantities of methane, which is stored in the marshy soils, will be set free. This will reinforce the greenhouse effect on the other hand.

4. Not only the poles, but also the glaciers of the mountains will melt. The consequence is, that one of the most important sources for freshwater gets lost. Rivers could dry up and especially the ground-water level will fall, which leads to a considerable shortage of the freshwater occurrences.
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Last edited by Dr.Zoidberg; 03-11-2007 at 08:52 AM.
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