摘要
利用北极1°×1°海冰面积指数、海平面气压、500hPa高度场和中国160站气温等资料,运用统计分析方法讨论了戴维斯海峡海冰的长期变化趋势、年代际变化及其与大气环流的关系。结果发现,冬季戴维斯海峡海冰面积呈明显增多趋势,且具有较显著的年代际变化,其长期变化趋势、年代际变化与500hPa高度场的WA型、EU型遥相关、西伯利亚高压及中国北部气温等存在密切的关系。冬季戴维斯海峡海冰在1981年发生突变,突变前后相应高度场、海平面气压场和流场等大气环流场均有显著差异。
Based on the Arctic 1°×1° sea-ice area index,500hPa heights,sea surface pressure(SLP) and the China 160 Stations temperature data,the relationship between the interdecadal variation of sea-ice in Davis Strait and the atmospheric circulation is discussed by statistical analysis methods.It is founded that,in the past years,the sea-ice area in the Davis Strait increased and showed a remarkably interdecadal variation,which is close associated with the WA and EU teleconnection patterns,as well as with trends of Siberia High,and winter temperature in Northern China.There are remarkable differences in 500 hPa heights,SLP,stream fields before and after 1981,when the sea-ice area in Davis Strait abruptly changed.
出处
《南京气象学院学报》
CSCD
北大核心
2004年第4期511-518,共8页
Journal of Nanjing Institute of Meteorology
基金
国家自然科学基金资助项目(40331010)
关键词
海冰
趋势变化
年代际变化
突变
大气环流
sea-ice
climate trend
interdecadal variation
abrupt change
atmospheric circulation
