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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: Pace vs. Quantity
By foolsgambit11 on 11/11/2008 4:57:43 PM , Rating: 3
You've confused principle and practice. While certain programs may or may not function correctly, that doesn't invalidate the principle that these are activities the government should be involved in. For instance, you mention school breakfast, lunch, after-school, and pre-school. You talk all around basic K-12 education, but never say we should stop giving it out for free. You don't seem to disagree with the principle that public education is a valid role for government (whether it's run effectively is another matter).

I don't think everybody should be fed, clothed, and sheltered by the government. And I never said that. Neither did any of the quotes from FDR I used. I said a certain amount of social welfare is a legitimate and necessary role of the State. What size the safety net should be is an area for debate. When done correctly, these programs encourage a certain amount of entrepreneurship and inventiveness, with people confident that they won't have to live in a cardboard box and die of rabies if their idea fails. However, when done wrong, these programs can lead to (or reinforce) lethargy and a lack of motivation.

The debate over these programs should be about how, not whether.

It's ridiculous, on this Veterans' Day, that we all cheer for those who sacrifice their time and their lives for a better country and a better world, but many are not willing to pay higher taxes or donate their time to make America a better place for all.


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