Contrasting climate change in the two polar regions

Polar research

John Turner¹  Jim Overland² 

[1] British Antarctic Survey, High Cross, Madingley Road, Cambridge CB3 0ET, UKCorrespondence;Pacific Marine Environment Laboratory, National Oceanic and Atmospheric Administration, 7600 Sand Point Way NE, Seattle, WA 98115, USA

关键词: Annular modes;    Antarctic;    Arctic;    climate change;    ozone hole;   

DOI  :  10.1111/j.1751-8369.2009.00128.x

学科分类：自然科学（综合）

来源: Co-Action Publishing

【 摘 要 】

The two polar regions have experienced remarkably different climatic changes in recent decades. The Arctic has seen a marked reduction in sea-ice extent throughout the year, with a peak during the autumn. A new record minimum extent occurred in 2007, which was 40% below the long-term climatological mean. In contrast, the extent of Antarctic sea ice has increased, with the greatest growth being in the autumn. There has been a large-scale warming across much of the Arctic, with a resultant loss of permafrost and a reduction in snow cover. The bulk of the Antarctic has experienced little change in surface temperature over the last 50 years, although a slight cooling has been evident around the coast of East Antarctica since about 1980, and recent research has pointed to a warming across West Antarctica. The exception is the Antarctic Peninsula, where there has been a winter (summer) season warming on the western (eastern) side. Many of the different changes observed between the two polar regions can be attri...

【 授权许可】

CC BY-NC