基于CryoSat-2数据的2010-2017年北极海冰厚度和体积的季节与年际变化特征

柯长青; 王蔓蔓

doi:10.3969/j.issn.0253-4193.2018.11.001

基于CryoSat-2数据的2010-2017年北极海冰厚度和体积的季节与年际变化特征

doi: 10.3969/j.issn.0253-4193.2018.11.001

南京大学地理与海洋科学学院, 江苏南京 210023

基金项目: 国家重点研发计划（2018YFC1407203）；国家自然科学基金（41830105）

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出版历程
- 收稿日期: 2018-01-19
- 修回日期: 2018-03-15

Seasonal and interannual variation of thinkness and volume of the Arctic sea ice based on CryoSat-2 during 2010-2017

School of Geographic & Oceanographic Sciences, Nanjing University, Nanjing 210023, China

摘要

摘要: 北极海冰变化影响着全球物质平衡、能量交换和气候变化。本文基于CryoSat-2测高数据和OSI SAF海冰密集度及海冰类型产品，分析了2010-2017年北极海冰面积、厚度和体积的季节和年际变化特征，结合NCEP再分析资料探讨了融冰期北极气温异常和夏季风异常对海冰变化的影响。结果表明，结冰期海冰面积的增加量波动较大，海冰厚度的增加量呈明显下降趋势。融冰期海冰厚度的减小量波动较大，2013年以后融冰期海冰面积的减小量逐年增加。海冰体积的变化趋势和面积变化更相似，融冰期的减小速率大于结冰期的增加速率。融冰期北极海表面大气温度异常与海冰融化量正相关。夏季风影响海冰的辐合和辐散，在弗拉姆海峡海冰的输运过程中起关键作用，促进了北冰洋表层水向大洋深层的传输。
- CryoSat-2 /
- 海冰面积 /
- 厚度 /
- 体积 /
- 结冰期 /
- 融冰期 /
- 北极
Abstract: The changes of the Arctic sea ice affect the global material balance, energy exchange and climate change. Here we analyzed the seasonal and interannual variation of sea ice area, thickness and volume in the Arctic during 2010-2017 based on CryoSat-2 measurements and OSI SAF sea ice concentration and sea ice type products. We discussed the effects of sea surface air temperature anomalies and summer wind field anomalies on Arctic sea ice combined with the NCEP/NCAR reanalysis data. The results show that the increase of sea ice area has large fluctuations during freezing period, while the increase of thickness shows declined tendency. The decrease of sea ice thickness fluctuates during melting period, while the decrease of sea ice area accelerates year by year after 2013. The change trend of sea ice volume is more similar to that of sea ice area, and the reduced rate of melting season is larger than the increased rate of freezing season. The atmospheric temperature anomaly of the Arctic sea surface during the melting season is positively correlated with the amount of sea ice melting. The summer wind field affects the convergence and divergence of sea ice and plays an important role in the transport of sea ice in the Fram Strait. It promotes the transport of warm surface water in the Arctic Ocean to the deep ocean.
- CryoSat-2 /
- sea ice area /
- thickness /
- volume /
- freezing period /
- melting period /
- Arctic

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