Featured Research

from universities, journals, and other organizations

Rapid Temperature Increases Above The Antarctic

Date:
March 30, 2006
Source:
British Antarctic Survey
Summary:
A new analysis of weather balloon observations from the last 30 years reveals that the Antarctic has the same 'global warming' signature as that seen across the whole Earth, but is three times larger than that observed globally. The results by scientists from British Antarctic Survey are reported this week in Science.

A radiosonde balloon launch at Halley Research Station in Antarctica.
Credit: Image courtesy of British Antarctic Survey

A new analysis of weather balloon observations from the last 30 years reveals that the Antarctic has the same 'global warming' signature as that seen across the whole Earth, but is three times larger than that observed globally. The results by scientists from British Antarctic Survey are reported this week in Science.

Although the rapid surface warming in the Antarctic Peninsula region has been known for some time, this study has produced the first indications of broad-scale climate change across the whole Antarctic continent.

Lead author Dr. John Turner of the British Antarctic Survey says,

"The warming above the Antarctic could have implications for snowfall across the Antarctic and sea level rise. Current climate model simulations don't reproduce the observed warming, pointing to weaknesses in their ability to represent the Antarctic climate system. Our next step is to try to improve the models. "

The paper -- Significant warming of the Antarctic winter troposphere -- is published in Science on 30 March 2006.

Background

Daily launches of weather balloons have been carried out at many of the Antarctic research stations since the International Geophysical Year of 1957-8. The balloons carry instrument packages called radiosondes that measure temperature, humidity and winds up to heights of 20 km or more. Recently many of the old radiosonde records have been digitised and brought together in a project funded by the Scientific Committee on Antarctic Research.

Analysis of the radiosonde data showed a winter season warming throughout the troposphere, which extends up to about 8 km, and cooling in the stratosphere above. The largest warming of almost three quarters of a degree Centigrade per decade was found close to 5 km above the surface. This is over three times the rate of warming observed for the world as a whole.

The warming has occurred across the whole of the Antarctic and is apparent in the balloon data from Amundsen-Scott Station at the South Pole to the many stations along the coast of East Antarctica.

Although climate change at the surface of the Earth receives wide attention, the atmosphere in recent decades has in fact warmed most some 4-5 km above the surface, with the stratosphere cooling above. There is increasing evidence that levels of greenhouse gases have provided a blanket above the Earth trapping heat at lower levels and giving cooling in the layers above.

Air temperatures in the Antarctic Peninsula region have risen by over 2.5C in the last 50 years, about 5 times faster than the global mean rate.

In recent decades both Polar Regions have shown very contrasting patterns of change at the surface, with the Arctic warming markedly, while there has been little change in the Antarctic outside of the Antarctic Peninsula region. Changes above the surface have not been investigated previously.


Story Source:

The above story is based on materials provided by British Antarctic Survey. Note: Materials may be edited for content and length.


Cite This Page:

British Antarctic Survey. "Rapid Temperature Increases Above The Antarctic." ScienceDaily. ScienceDaily, 30 March 2006. <www.sciencedaily.com/releases/2006/03/060330181319.htm>.
British Antarctic Survey. (2006, March 30). Rapid Temperature Increases Above The Antarctic. ScienceDaily. Retrieved September 21, 2014 from www.sciencedaily.com/releases/2006/03/060330181319.htm
British Antarctic Survey. "Rapid Temperature Increases Above The Antarctic." ScienceDaily. www.sciencedaily.com/releases/2006/03/060330181319.htm (accessed September 21, 2014).

Share This



More Earth & Climate News

Sunday, September 21, 2014

Featured Research

from universities, journals, and other organizations


Featured Videos

from AP, Reuters, AFP, and other news services

Climate Change Rally Held in India Ahead of UN Summit

Climate Change Rally Held in India Ahead of UN Summit

AFP (Sep. 20, 2014) Some 125 world leaders are expected to commit to action on climate change at a UN summit Tuesday called to inject momentum in struggling efforts to tackle global warming. Duration: 00:41 Video provided by AFP
Powered by NewsLook.com
New Music With Recycled Instruments at Colombia Fest

New Music With Recycled Instruments at Colombia Fest

AFP (Sep. 19, 2014) Jars, bottles, caps and even a pizza box, recovered from the trash, were the elements used by four musical groups at the "RSFEST2014 Sonorities Recycling Festival", in Colombian city of Cali. Duration: 00:49 Video provided by AFP
Powered by NewsLook.com
Raw: Wildfires in CA Burn Forest Asunder

Raw: Wildfires in CA Burn Forest Asunder

AP (Sep. 18, 2014) An out-of-control Northern California wildfire has nearly 2,800 people from their homes as it continues to grow, authorities said Thursday. Authorities said a man has been arrested on suspicion of arson for starting the fire on Saturday. (Sept. 18) Video provided by AP
Powered by NewsLook.com
Raw: Elephant Undergoes Surgery in Tbilisi Zoo

Raw: Elephant Undergoes Surgery in Tbilisi Zoo

AP (Sep. 18, 2014) Grand the elephant has successfully undergone surgery to remove a portion of infected tusk at Tbilisi Zoo in Georgia. British veterinary surgeons used an electric drill to extract the infected piece. (Sept. 18) Video provided by AP
Powered by NewsLook.com

Search ScienceDaily

Number of stories in archives: 140,361

Find with keyword(s):
Enter a keyword or phrase to search ScienceDaily for related topics and research stories.

Save/Print:
Share:

Breaking News:
from the past week

In Other News

... from NewsDaily.com

Science News

Health News

Environment News

Technology News



Save/Print:
Share:

Free Subscriptions


Get the latest science news with ScienceDaily's free email newsletters, updated daily and weekly. Or view hourly updated newsfeeds in your RSS reader:

Get Social & Mobile


Keep up to date with the latest news from ScienceDaily via social networks and mobile apps:

Have Feedback?


Tell us what you think of ScienceDaily -- we welcome both positive and negative comments. Have any problems using the site? Questions?
Mobile: iPhone Android Web
Follow: Facebook Twitter Google+
Subscribe: RSS Feeds Email Newsletters
Latest Headlines Health & Medicine Mind & Brain Space & Time Matter & Energy Computers & Math Plants & Animals Earth & Climate Fossils & Ruins