Melting Polar Ice Caps Recently, there has been a disinformation campaign about the melting polar ice caps.
Polar bears filmed themselves while hunting seals on sea ice, revealing why they are so at risk from global warming By Tom Yulsman February 2, 8: And the high north where polar bears live has warmed faster than any other region on Earth, resulting in shrinking sea ice and a cascade of other environmental impacts.
In this region, where Arctic sea ice declines have been among the most rapid, the polar bear population has declined by about 40 percent over the past decade. These animals lost weight during the period that they were observed.
Paleoclimate reconstructions of atmospheric carbon dioxide concentrations, Arctic sea ice extent, air temperature, and sea surface temperature. In the Beaufort Sea, as elsewhere in the Arctic, spring break-up of sea ice and its retreat toward the north is occurring earlier and earlier.
Moreover, even where the ice remains, it is becoming increasingly fragmented. This means polar bears have to travel farther during spring — the key period when they do most of their hunting and put on most of their weight — to find the seals they prey upon.
With the arrival of summer, the bears enter a fasting period. But this fall freeze-up is occurring later than it once did, meaning the bears have to wait longer until they can begin to eat again.The polar regions are particularly vulnerable to a warming atmosphere.
Average temperatures in the Arctic are rising twice as fast as they are elsewhere on earth, and the world's ice sheets are.
Global sea level rose by about meters during the several millennia that followed the end of the last ice age (approximately 21, years ago), and stabilized between 3, and 2, years ago. Ice flow plays an important role in everything from deep ocean circulation patterns to global warming.
Let's Talk with Martin Jeffries about Sea Ice and Climate in Antarctica At the poles, it's possible to study sea ice that's 3, years old. This, combined with the warming caused by the loss of Arctic sea ice, means that the overall ice/snow albedo effect in the Arctic could add as much as 50 percent to the direct global heating effect of CO2.
A Brief History of Ice Ages and Warming. Global warming started long before the "Industrial Revolution" and the invention of the internal combustion tranceformingnlp.com warming began 18, years ago as the earth started warming its way out of the Pleistocene Ice Age-- a time when much of North America, Europe, and Asia lay buried beneath great sheets of glacial ice.
May 13, · Global warming caused by the human-driven release of greenhouse gases has helped to destabilize the ice sheet, though other factors may also be involved, the scientists said.