Print 191 comment(s) - last by lucasb.. on Nov 30 at 1:58 PM

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).

Comments     Threshold

This article is over a month old, voting and posting comments is disabled

RE: Pace vs. Quantity
By monoape on 11/10/2008 3:47:25 PM , Rating: 2
Ah, the tired, old 1970s ice age story...

Also, you are aware that the USA is not the only country with a functioning scientific community?

Provide evidence that they are all lying in a massive global conspiracy or that they are all wrong. Just a tiny scrap of *real* evidence that thousands of scientists in dozens of countries are all colluding in the biggest con trick in human history. Evidence that they've all been manufacturing data for decades to fool the rest of the planet - just so they can get funding to do the salaried job they were employed for anyway.

Come on - you must have *something*....

RE: Pace vs. Quantity
By Expunge on 11/12/2008 9:46:56 AM , Rating: 2
Your source is wikipedia??? And a opinon poll at that.. Talk about being lazy to try and prove your point.

You want to argue about global pollution.. okay I will agree that man is screwing up the planet. But that it affects the temperature of the planet I disagree strongly.

We can't make it rain, we can't predict the number of hurricane's that will impact the United States with any degree of accuracy year after year. What makes you think these same scientists can predict what the temperature will be like in 30 years when they can't even predict the temperature next week?

You want to know why these people agree.. because that is where the money is. Plain and simple. If they say no, they get no money and are out of a job.

It's all about the Benjamin's.

"The whole principle [of censorship] is wrong. It's like demanding that grown men live on skim milk because the baby can't have steak." -- Robert Heinlein

Copyright 2016 DailyTech LLC. - RSS Feed | Advertise | About Us | Ethics | FAQ | Terms, Conditions & Privacy Information | Kristopher Kubicki