摘要
巴伦支海和喀拉海区域是北极海冰变化最显著的地区之一,由于该区域海冰厚度和海冰流速观测数据的不完整,对于巴伦支海和喀拉海区域海冰体积时空变化特征的认识还不够完善,对引起该区域海冰变化的关键过程及海冰对热力学因素的响应理解也不够清晰。本研究综合利用1991—2019年海冰流速和海冰厚度再分析数据与海冰流速模式数据,定量分析了巴伦支海和喀拉海区域海冰变化的主要贡献来源。结果表明,相较于外部的海冰输运变化,局地海冰变化贡献是该区域海冰总体积变化的关键过程。外部海冰的贡献主要由斯瓦尔巴群岛与北地群岛之间的海冰向外输出增加和内向输入减少共同作用引起。在局地海冰变化中,海冰体积减小主要由喀拉海和巴伦支海北部以及喀拉海南部海冰厚度减小所致。区域内海冰分别和海表温度以及地表气温呈现较为显著的负相关性变化。海冰与海表温度高相关性区域的分布与海表温度增暖较快的区域相一致,春、夏季主要位于巴伦支海,秋、冬季扩大至巴伦支海和喀拉海大部分区域。海冰与地表气温之间的平均相关系数高于与海表温度的相关系数,高相关性区域的分布与海冰厚度减小明显的区域分布相似。
The Barents Sea and Kara Sea are the regions with significant change of Arctic sea ice. Due to the lack of observations of sea ice thickness and sea ice movement velocity, understanding of the spatial and temporal characteristics of sea ice volume variation in the Barents Sea and Kara Sea region is insufficient. The key processes that cause sea ice changes in the region and the response of sea ice to thermodynamic factors are still unclear. Based on reanalysis data and model simulations of sea ice movement velocity and thickness from 1991 to 2019, the contribution of sea ice variation in the Barents Sea and Kara Sea are analyzed. The results show that, compared with external variation of sea ice transport,local contribution of sea ice variation is the key process of the total sea ice volume change in the region. The external contribution of sea ice is mainly caused by the combined effect of increased outward export and decreased inward import of sea ice between the Svalbard Archipelago and the Severnaya Zemlya. For the local variation, the decrease of sea ice volume is mainly caused by the decrease of sea ice thickness in northern Kara Sea, Barents Sea, and southern Kara Sea. Sea ice has significant negative correlations with sea surface temperature and surface air temperature. The areas with high correlation between sea ice and sea surface temperature are located in the areas with rapid warming in sea surface temperature, where are mainly located in the Barents Sea in spring and summer, and expanded to most areas of the Barents Sea and Kara Sea in autumn and winter. The mean correlation coefficient between sea ice and surface air temperature is higher than that with sea surface temperature. The distribution of areas with high correlation is similar to that of areas with larger decrease in sea ice thickness.
作者
谢瑱瑮
张瑜
陈长胜
徐丹亚
张晓
王宇蓉
张艳艳
XIE Tian-li;ZHANG Yu;CHEN Chang-sheng;XU Dan-ya;ZHANG Xiao;WANG Yu-rong;ZHANG Yan-yan(College of Marine Sciences,Shanghai Ocean University,Shanghai 201306,China;Southern Marine Science and Engineering Guangdong Laboratory(Zhuhai),Zhuhai 519082,China;International Center for Marine Studies,Shanghai Ocean University,Shanghai 201306,China;School for Marine Science and Technology,University of Massachusetts Dartmouth,New Bedford Massachusetts 02744,USA)
出处
《海洋科学进展》
CAS
CSCD
北大核心
2023年第1期24-39,共16页
Advances in Marine Science
基金
国家自然科学基金重点项目(42130402)
国家自然科学基金项目(41706210)
国家重点研发计划项目(2019YFA0607000)
上海市自然科学基金项目(22ZR1427400)
南方海洋科学与工程广东省实验室(珠海)创新团队建设项目(311021009)。
关键词
巴伦支海
喀拉海
海冰
体积通量
海表温度
地表气温
Barents Sea
Kara Sea
sea ice
volume transport
sea surface temperature
surface air temperature
