气象2016，Vol.42Issue(10)：1223-1229,7.DOI:10.7519/j.issn.1000-0526.2016.10.006
2015／2016年前冬至隆冬北半球中高纬度暖冷急转及环流特征初析
Possible Causes for the Sudden Drop of Air Temperature in the Northern Hemisphere from Early- to Mid-Winter
摘要
Abstract
During December 2015,the averaged surface air temperature over most regions in the mid-lati-tude of Northern Hemisphere was above normal.Some regions in North America experienced the warmest December in the record.However,the temperature dropped suddenly in January 2016.Extreme cold weather events such as cold surges,winter storms attacked Europe,North America and East Asia.Using the NCEP reanalysis and station observation data,the possible causes for the sudden drop of air tempera-ture during the winter were discussed.The analysis reveals that the Arctic oscillation turned from positive phase in December 2015 to negative phase in January 2016,leading to the warmer Arctic but the colder mid-latitude continent.The development and decay of mid-latitude atmospheric blocking also contributed to the sudden drop of air temperature.Furthermore,in the context of global warming,the sea surface temperature of tropical eastern Pacific is often above normal during the year of El Ni~no,which gives rise to larger temperature gradient between the equator and the pole,causing a more unstable climate system,and further leading to more frequent extreme cold events.关键词
暖冷急转/北极涛动/超强厄尔尼诺Key words
sudden drop of air temperature/Arctic oscillation/super El Ni~no分类
天文与地球科学引用本文复制引用
聂羽,孙冷,王东阡,李多..2015／2016年前冬至隆冬北半球中高纬度暖冷急转及环流特征初析[J].气象,2016,42(10):1223-1229,7.基金项目
国家重点基础研究发展计划（973计划）（2015CB953900）、北极关键区海冰变化及其在气候监测中的应用项目（CCSF201502）和中国气象局气候研究开放实验室开放课题青年基金2015年度资助项目共同资助 （）
