Causes of the record-low Antarctic sea-ice in austral summer 2022

被引：0
|
作者：
Chao Zhang [1 ]
Shuanglin Li [2 ,1 ,3 ]
机构：
[1] Department of Atmospheric Science and Science and Technology Innovation Center,School of Environmental Studies,China University of Geosciences
[2] Institute of Atmospheric Physics/Climate Change Research Center,Chinese Academy of Sciences
[3] College of Earth and Planetary Sciences,University of Chinese Academy of Sciences
来源：
AtmosphericandOceanicScienceLetters | 2023年 / 16卷 / 06期
基金：
中国国家自然科学基金;
关键词：
南极海冰; 历史新低; 历史最强臭氧损耗; 南半球环状模; 拉尼娜; 阿蒙森低压;
D O I：
暂无
中图分类号：
P731.15 [海冰]; P941.61 [南极];
学科分类号：
摘要：
2022年夏季(2021年12月至2022年2月)南极海冰面积达到历史新低,西南极减少最显著.2021年8～10月南半球环状模接近历史最强和7～9月海洋性大陆附近海温显著增暖是两个关键因素.由于平流层臭氧破纪录减少使得前者维持历史最强或接近最强,导致阿蒙森低压(ASL)加深并向西南移动,有利于海冰减少.后者持续到夏季,有利于拉尼娜的发展,通过激发罗斯贝波列加深ASL.在热力上,臭氧减少导致向下净短波辐射增加,引起西南极增暖.此外,净短波辐射-海温-云形成正反馈,与埃克曼输送一起,放大表面增暖,从而促进海冰融化.
引用
收藏
页码：24 / 29
页数：6
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