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2007和2012年北极最小海冰范围空间分布不同的原因分析
引用本文:崔红艳,乔方利,舒启,宋亚娟,姜春飞.2007和2012年北极最小海冰范围空间分布不同的原因分析[J].海洋学报(英文版),2015,34(9):94-101.
作者姓名:崔红艳  乔方利  舒启  宋亚娟  姜春飞
作者单位:中国海洋大学海洋环境学院, 青岛 266100;国家海洋局第一海洋研究所, 青岛 266061;国家海洋局海洋环境科学与数值模拟重点实验室, 青岛 266061,国家海洋局第一海洋研究所, 青岛 266061;国家海洋局海洋环境科学与数值模拟重点实验室, 青岛 266061,国家海洋局第一海洋研究所, 青岛 266061;国家海洋局海洋环境科学与数值模拟重点实验室, 青岛 266061,国家海洋局第一海洋研究所, 青岛 266061;国家海洋局海洋环境科学与数值模拟重点实验室, 青岛 266061,国家海洋局第一海洋研究所, 青岛 266061;国家海洋局海洋环境科学与数值模拟重点实验室, 青岛 266061
摘    要:Satellite records show the minimum Arctic sea ice extents(SIEs) were observed in the Septembers of 2007 and2012, but the spatial distributions of sea ice concentration reduction in these two years were quite different.Atmospheric circulation pattern and the upper-ocean state in summer were investigated to explain the difference.By employing the ice-temperature and ice-specific humidity(SH) positive feedbacks in the Arctic Ocean, this paper shows that in 2007 and 2012 the higher surface air temperature(SAT) and sea level pressure(SLP)accompanied by more surface SH and higher sea surface temperature(SST), as a consequence, the strengthened poleward wind was favorable for melting summer Arctic sea ice in different regions in these two years. SAT was the dominant factor influencing the distribution of Arctic sea ice melting. The correlation coefficient is –0.84 between SAT anomalies in summer and the Arctic SIE anomalies in autumn. The increase SAT in different regions in the summers of 2007 and 2012 corresponded to a quicker melting of sea ice in the Arctic. The SLP and related wind were promoting factors connected with SAT. Strengthening poleward winds brought warm moist air to the Arctic and accelerated the melting of sea ice in different regions in the summers of 2007 and 2012. Associated with the rising air temperature, the higher surface SH and SST also played a positive role in reducing summer Arctic sea ice in different regions in these two years, which form two positive feedbacks mechanism.

关 键 词:北极海冰范围  大气环流  上层海洋反馈
收稿时间:2014/8/25 0:00:00
修稿时间:2015/3/18 0:00:00

Causes for different spatial distributions of minimum Arctic sea-ice extent in 2007 and 2012
CUI Hongyan,QIAO Fangli,SHU Qi,SONG Yajuan and JIANG Chunfei.Causes for different spatial distributions of minimum Arctic sea-ice extent in 2007 and 2012[J].Acta Oceanologica Sinica,2015,34(9):94-101.
Authors:CUI Hongyan  QIAO Fangli  SHU Qi  SONG Yajuan and JIANG Chunfei
Affiliation:1.College of Physical and Environmental Oceanography, Ocean University of China, Qingdao 266100, China;The First Institute of Oceanography, State Oceanic Administration, Qingdao 266061, China;Key Laboratory of Marine Science and Numerical Modeling, State Oceanic Administration, Qingdao 266061, China2.The First Institute of Oceanography, State Oceanic Administration, Qingdao 266061, China;Key Laboratory of Marine Science and Numerical Modeling, State Oceanic Administration, Qingdao 266061, China
Abstract:Satellite records show the minimum Arctic sea ice extents (SIEs) were observed in the Septembers of 2007 and 2012, but the spatial distributions of sea ice concentration reduction in these two years were quite different. Atmospheric circulation pattern and the upper-ocean state in summer were investigated to explain the difference. By employing the ice-temperature and ice-specific humidity (SH) positive feedbacks in the Arctic Ocean, this paper shows that in 2007 and 2012 the higher surface air temperature (SAT) and sea level pressure (SLP) accompanied by more surface SH and higher sea surface temperature (SST), as a consequence, the strengthened poleward wind was favorable for melting summer Arctic sea ice in different regions in these two years. SAT was the dominant factor influencing the distribution of Arctic sea ice melting. The correlation coefficient is -0.84 between SAT anomalies in summer and the Arctic SIE anomalies in autumn. The increase SAT in different regions in the summers of 2007 and 2012 corresponded to a quicker melting of sea ice in the Arctic. The SLP and related wind were promoting factors connected with SAT. Strengthening poleward winds brought warm moist air to the Arctic and accelerated the melting of sea ice in different regions in the summers of 2007 and 2012. Associated with the rising air temperature, the higher surface SH and SST also played a positive role in reducing summer Arctic sea ice in different regions in these two years, which form two positive feedbacks mechanism.
Keywords:Arctic sea ice extent  atmospheric circulation  upper-ocean feedback
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