南极海冰运动速度的变化特征及其影响因子分析-海洋预报

南极海冰运动速度的变化特征及其影响因子分析

单位：1. 中国海洋大学, 山东青岛 266100;
2. 国家海洋环境预报中心, 北京 100081

分类号：P731.15

出版年·卷·期（页码）：2020·37·第五期（12-23）

摘要：

利用NSIDC提供的每日和月平均极区海冰运动矢量数据，统计分析了南极地区1979—2016年海冰运动速度的年、月尺度的时空变化特征以及近几十年南极海冰范围增加与海冰运动速度之间的关系，并讨论了影响南极海冰运动速度的主要因子。结果表明：1979—2016年南大洋全区和各扇区海冰运动速度均呈现增加趋势，春、冬季海冰运动速度增加趋势大于夏、秋季，季节差异明显；海冰运动速度与海冰范围有显著的正相关关系；海冰运动与海表面气压场密切相关，主要受低压风场的影响，威德尔海、罗斯海海冰的快速流出和顺时针旋转的特征与低压区的位置有密切关联，自由漂流区的海冰整体表现为自西向东运动。

Using the daily and monthly average polar sea ice motion data provided by NSIDC, we investigated the characteristics of Antarctic sea ice motion from 1979 to 2016. The relationship between sea ice motion and sea ice extent and the main factors affecting sea ice motion in Antarctica are also discussed. It shows that sea ice motion in the Southern Ocean has an increasing trend, and the trend is more pronounced in winter and summer with an obvious seasonal difference. The sea ice motion has positive relationship with sea ice extent. The sea ice movement is closely related to the sea surface pressure field and is mainly affected by the low-pressure wind field. The rapid outflow and clockwise rotation of the sea ice in the Weddell Sea and Ross Sea are closely related to the location of the low-pressure zone, and the overall movement of sea ice in the free drift zone is from west to east.

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