近40年北极海冰及近地面风压场长期变化趋势分析

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中图分类号：P467 文献标志码：A 文章编号：2096-3599（2025）06-0118-10

DOI：10.19513/j.cnki.hyqxxb.20221119001

Analysis on long-term variation trend of Arctic sea ice and near-surface wind/pressure field in recent 4O years

LIU Tingxuan'，DONG Huijie（1.Shizuishan Meteorological Service，Ningxia Hui AutonomousRegion，Shizuishan 75300，China；2.Schoolof Atmospheric Sciences，Nanjing Universityof Information Science& Technology，Nanjing 21oo44，China）

AbstractBased on the retrieval data of sea ice concentration from the U.S.National Snow and Ice Data Center and ERA-Interim data from 1979 to 2O20，this paper makes use of the ensemble empirical mode decomposition method to analyze the variations of the sea ice and atmospheric wind/pressure field during this period.The results are shown below.（1） The sea ice coverage area has shown a decreasing trend in the past 4O years，and the decreasing rate is about 1.4×103km2/（10a） .Among them，the decreasing trend of thesea ice concentration in the Barents Seaand Kara Sea is the most significant.At the same time，the sea ice coverage area reaches a minimum in September （summer） and a maximum in March （winter）.（2）The polar sea-level pressure field shows a decreasing trend in the center of the Arctic and an increasing trend outside the Arctic from 1979 to 2O14，and its spatial distribution characteristics are similar to those of the positive phase of the Arctic Oscillation.At the same time，the surface wind blowing from the Atlantic Ocean to the Barents Sea has an increasing trend from 1979 to 2O14.Considering the dragging effect of the surface wind field onthe surface current and sea ice，it is speculated that the warm water from the Atlantic Ocean will increase in the Barents Sea，which may cause the sea ice to melt in the area.

Keywordsthe Arctic；sea ice concentration；1O-m wind field；sea ice motion

0 引言

自工业革命开始，全球气温呈现明显的上升趋势，且不同纬度、不同地区变暖的幅度和速率不一致[1]。（剩余9081字）