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30 years of sea ice data. The red line indicates deviation from the seasonally-adjusted mean.  (Source: Arctic Research Center, University of Illinois)
Rapid Rebound Brings Ice Back to Levels from the 1980s.

An abnormally cool Arctic is seeing dramatic changes to ice levels.  In sharp contrast to the rapid melting seen last year, the amount of global sea ice has rebounded sharply and is now growing rapidly. The total amount of ice, which set a record low value last year, grew in October at the fastest pace since record-keeping began in 1979.

The actual amount of ice area varies seasonally from about 16 to 23 million square kilometers. However, the mean anomaly-- defined as the difference between the current area and the seasonally-adjusted average-- changes much slower, and generally varies by only 2-3 million square kilometers.

That anomaly had been negative, indicating ice loss, for most of the current decade and reached a historic low in 2007. The current value is again zero, indicating an amount of ice exactly equal to the global average from 1979-2000.

Bill Chapman, a researcher with the Arctic Climate Center at the University of Illinois, says the rapid increase is "no big deal". He says that, while the Arctic has certainly been colder in recent months, the long-term decrease is still ongoing. Chapman, who predicts that sea ice will soon stop growing, sees nothing in the recent data to contradict predictions of global warming.

Others aren't quite so sure. Dr. Patrick Michaels, Professor of Environmental Science at the University of Virginia, says he sees some "very odd" things occurring in recent years. Michaels, who is also a Senior Fellow with the Cato Institute, tells DailyTech that, while the behavior of the Arctic seems to agree with climate models predictions, the Southern Hemisphere can't be explained by current theory. "The models predict a warming ocean around Antarctica, so why would we see more sea ice?" Michaels adds that large areas of the Southern Pacific are showing cooling trends, an occurrence not anticipated by any current climate model.

On average, ice covers roughly 7% of the ocean surface of the planet. Sea ice is floating and therefore doesn't affect sea level like the ice anchored on bedrock in Antarctica or Greenland. However, research has indicated that the Antarctic continent -- which is on a long-term cooling trend -- has also been gaining ice in recent years.

The primary instrument for measuring sea ice today is the AMSR-E microwave radiometer, an instrument package aboard NASA's AQUA satellite. AQUA was launched in 2002, as part of NASA's Earth Observing System (EOS).



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RE: Why bother?
By lucasb on 11/30/2008 1:58:53 PM , Rating: 2
quote:
Also thanks for revealing your own bias and ideology. (As if they already weren't clear enough.)

Let me introduce the facts and stop your baseless conjetures.
I'm described as a radical centrist by my friends (one of them has a degree in political science) and as a moderate liberal by my parents, whom are conservative. My grandparents are either conservative or independent and one great-grandfather was an anarchist who flee away from the fascist Italy and came to Argentina (he was a master with the lathe)
quote:
BTW modern democrats have much more in common with marxism than any other ideology but you are too dumb to see it.

What a load of nonsense, but that's something expected here in DailyTech.
- I'm not a Democrat. First and foremost, I don't (and won't) live in the US. Second, I wouldn't join a party with weak and ambiguous ideas, such as "spreading the wealth".
- You must be blind, ignorant or deeply biased to compare a center-left party (i.e., a party holding moderate liberal values such as egalitarianism) to an ideology like Marxism. But after 30 years of neoconservatism (yup, that includes the "moderate" but insipid administration of Clinton) people with zero knowledge of politics and utterly brainwashed use words like socialist to describe someone who would be simply labeled as a typical democrat 40 years ago. Even Carter, a conservative Democrat, is sometimes accused of being "too liberal".
- Supposing that someday I become an US citizen I would gladly join the Republican party when neoconservatives, the religious right and the false libertarians (those who only are a proxy to corporate interests and radical ideologies such as white supremacy) no longer exist.
quote:
What part of "spreading the wealth" from a few rich to a large amount of poor people is not marxism? Did you even bother to look up what it means?

Thanks for showing your ignorance of political philosophy. Yes, I bothered to look up what's Marxism. I have a nice copy of "Das Capital" and other 40 books closely or loosely related to left-wing ideas. "Das Capital" is one of my favourites books.
If you hadn't made such a lousy connection between "spreading the wealth", marxism and the Democrat party, I would be happy to initiate a political discussion about values, cognitive biases, economics, historical frameworks, etc. Since I'm almost sure that such discussion will be an exercise in futility, I will take the easy way which consists of linking Wikipedia's article on Marxism as a nice, almost dumbed-down introduction to the topic. It's a fine read for someone who obviously hasn't touched a voluminous work like Das Capital. Good luck:
http://en.wikipedia.org/wiki/Marxist


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