引用本文:陈樟, 吴仁广.3月北半球海冰趋势变化的区域特征及影响因子分析[J].西南大学学报(自然科学版),2019,41(10):101~107
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3月北半球海冰趋势变化的区域特征及影响因子分析
陈樟, 吴仁广1,2,3
1. 成都信息工程大学 大气科学学院, 成都 610225;2. 高原大气与环境四川省重点实验室, 成都 610225;3. 中国科学院 大气物理研究所季风系统研究中心, 北京 100029
摘要:
利用海冰密集度资料和海冰范围指数,分析了3月北半球海冰在1979-1995年和1996-2014年2个时间段内的变化趋势以及趋势差异的区域特征.结果表明:北半球3月总海冰范围以稳定速率减少,速率无明显加速.而各个分海域的海冰变化表现出一定的区域差异.其中,巴伦支海海冰在2个时期内以稳定的速率减少;白令海海冰不减反增;鄂霍次克海海冰缩减速度在后期减小;圣劳伦斯湾的海冰范围在90年代中期以前显著增大,后期缓慢缩减.3月海冰趋势变化的空间特征与同期表面气温和表面风场的趋势变化相一致.
关键词:  海冰变化趋势  区域差异  表面气温变化  表面风场变化
DOI:10.13718/j.cnki.xdzk.2019.10.014
分类号:P467
基金项目:国家自然科学基金项目(41705051);高原大气与环境四川省重点实验室开放课题(PAEKL-2017-Y4);成都信息工程大学科研基金项目(KYTZ201726).
Regional Features and Factors of the Northern Hemisphere Sea Ice Trends in March
CHEN Zhang, WU Ren-guang1,2,3
1. School of Atmospheric Sciences, Chengdu University of Information Technology, Chengdu 610225, China;2. Key Laboratory of Plateau Atmosphere and Environment of Sichuan Province, Chengdu 610225, China;3. Center for Monsoon System Research, Institute of Atmospheric Physics, Chinese Academy of Sciences, Beijing 100029, China
Abstract:
Based on the data of sea ice concentration and using the sea ice extent (SIE) index, the present study investigates the changes in the Northern Hemisphere sea ice trends in March during 1979-1995 and 1996-2014 and their regional features. The results show that although the negative slope of March SIE over the whole Northern Hemisphere did not experience obvious changes with time, pronounced regional differences were present in the sea ice trend and its change in the mid-1990s. The Barents Sea SIE exhibited a significant downward trend in both periods with a relatively steady rate. The SIE in the Bering Sea showed a positive trend and the slope became steeper after the late 1990s. The Sea of Okhotsk was subjected to ice loss during both periods with a notable increase in between. The SIE in the Gulf of St. Lawrence showed an upward trend during the earlier period and was dominated by inter-annual fluctuations during the later period. The trends and their changes in the mid-1990s of the March sea ice were consistent with those in surface air temperature and atmospheric wind.
Key words:  sea ice trend  regional difference  surface air temperature change  surface wind change
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