backtop


Print 75 comment(s) - last by MadMaster.. on Jan 29 at 10:32 AM

Global warming may not be the culprit after all when it comes to Artic changes

Climate data can be difficult to analyze. Take for instance global temperature changes. Whereas the Northern Hemisphere has been warming, the Southern half of the planet is cooling. While Antarctic Ice is at near-record levels, the Northern Pole is warming at an unprecedented pace-- much faster than global warming models predict.

A new study published in the journal Nature identified a possible cause for this discrepancy. It identifies a natural, cyclical flow of atmospheric energy around the Arctic Circle. A team of researchers, led by Rune Graversen of Stockholm University, conclude this energy flow may be responsible for the majority of recent Arctic warming.

The study specifically rules out global warming or albedo changes from snow and ice loss as the cause, due to the "vertical structure" of the warming ... the observed warming has been much too weak near the ground, and too high in the stratosphere and upper troposphere.

This study follows hot on the heels of research by NASA, which identified "unusual winds" for rapid Arctic ice retreat. The wind patterns, set up by atmospheric conditions from the Arctic Oscillation, began rapidly pushing ice into the Transpolar Drift Stream, a current which quickly sped the ice into warmer waters.

A second NASA team, using data from the the GRACE (Gravity Recovery and Climate Experiment) satellite, recently concluded that changes in the Arctic Oscillation were "mostly decadal in nature", rather than driven by global warming.



Comments     Threshold


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

RE: Wrong again Masher
By Alexstarfire on 1/5/2008 6:37:06 PM , Rating: 2
That's what I believe is happening much more than global warming. All they've proved is that they have selective, or local, warming. I read an article not to long ago that was talking about the sea level. They showed that certain methods that were used to show that it raised weren't very accurate. Like the height of the tide and such. They also said that a tree off of Australia that is usually used to look at the sea level was removed, but then placed back in it's original spot. They said the most accurate way was to use a satellite. I don't remember exactly what they measured, but they used a satellite. They said that they could detect a change in sea level height of as small as 1mm, and that they haven't detected any change. I don't really wanna find the article, but I'm sure you could find it if you looked for it. It wasn't that long ago, maybe a month or so.


"You can bet that Sony built a long-term business plan about being successful in Japan and that business plan is crumbling." -- Peter Moore, 24 hours before his Microsoft resignation














botimage
Copyright 2014 DailyTech LLC. - RSS Feed | Advertise | About Us | Ethics | FAQ | Terms, Conditions & Privacy Information | Kristopher Kubicki