And my question to those who speculate that the northern ice is melting as a result of global increases in temperature, why is the southern hemisphere ice intact? Seems to me that if the whole world was turning into a hothouse we would see similar melts down south as well. It is global warming, right?
Well, for starters, it isn't intact:
BALI, Indonesia, Dec. 11 (Xinhua) -- The population of Antarctica's penguin is in danger of global warming, World Wild Fund for Nature (WWF) said on Tuesday at the ongoing UN climate change conference held in Bali, a resort island of Indonesia.
Global warming is taking a way precious ground on which penguins raise their young. Food has become increasingly scarce because of warming in the conjunction with over fishing, WWF said in a press release quoting its latest research report.
The report, "Antarctic Penguins and Climate Change," said the four species of penguins that breed on the Antarctic continent are under escalating pressure. The Antarctic peninsula is warming five times faster than the average rate of global warming. The vast Southern Ocean has warmed all the way down to a depth of 3,000 meters, it said.
The report said sea ice covered 40 percent less area than it did 26 years ago off the West Antarctic Peninsula. This decrease led to reduced numbers of krill, the main source of food for the chinstrap and penguins.
Warmer temperatures and stronger winds mean the penguins had to raise their chicks on increasingly thinner sea ice. For many years, sea ice has broken off early and many eggs and chick have been blown away before they were ready to survive on their own.
"The Antarctic penguins already have a long march behind them," Anna Reynolds, deputy director of WWF's Global Climate Change Program, said in a statement at the Bali UN climate talks.
"Now it seems these icons of the Antarctic will have to face an extremely tough battle to adapt to the unprecedented rate of climate change," he said.
The number of chinstraps decreased by 30 to 66 percent in some colonies, as less food made it more difficult for the young to survive. It's the same story for Gentoo penguins, who are increasingly dependent on the declining krill stocks as overfishing kills off their usual food source, according to WWF.
The emperor penguin, the largest and the grandest in the world, has seen some of its colonies halved in size over the past half century.
In the northwestern coast of the Antarctic peninsula, where warming has been the most dramatic, populations of Adelie penguins have dropped by 65 percent over the past 25 years, WWF said.
"The food web of Antarctica, and thus the survival of penguins and many other species, is bound up in the future of the sea ice," said James P. Leape, director general of WWF International.
"After such a long march to Bali, ministers must now commit to sharp reductions in carbon emissions for industrialized countries, to protect Antarctica and safeguard the health of the planet," he said.
The two-week U.N. climate change conference is tasked with drawing up a "roadmap" for negotiations on a new climate deal in the next two years before the current phase of the Kyoto Protocol expires in 2012.
As to why Antarctica is warming more slowly, it is a lot colder than the Arctic. Here's why: (From Woods Hole Oceanographic)
"Why is Antarctica colder than the Arctic?
There are two key reasons why Antarctica is colder than the Arctic.
First, since Antarctica is a giant landmass, it receives very little heat from the ocean. In comparison, the Arctic's icy cover is relatively thin and it has an entire ocean underneath it. While the water is anything but warm, it usually stays around 30? F, which is often significantly warmer than the air above the ice. Some of this heat makes its way through the ice to the air, moderating temperatures somewhat. Also, even in winter areas of open water are present in the pack ice, allowing more ocean heat to escape into the air.
The second reason is elevation. As you go up in altitude, the air temperature decreases (by 6.5C for each 1 km). Since the average elevation of Antarctica is 2.3 km, the air is much colder compared to the Arctic Ocean, which is at sea level. "
You may remember back in 2002 when the Larsen ice shelf collapsed. Antarctica is losing sea ice too, just at a different rate and in a different configuration from the Arctic. They are two different places, one is an ocean, the other is a continent.
Here's a link for some climate change FAQ.
http://www.whoi.edu/page.do?pid=12457&tid=282&cid=13366#14
And that is probably all I have to say about it. I've been staying away from this thread because it seems to me most people have made up their minds.
