孙健,李栋梁,邵鹏程,高娜. 2019. 中国冬季气温月际变化特征及其对大气环流异常的响应[J]. 气象学报, (0):-, doi:10.11676/qxxb2019.050
中国冬季气温月际变化特征及其对大气环流异常的响应
Inter-monthly variation of winter air temperature in China and its relations with atmospheric circulation anomalies
投稿时间:2018-03-28  修订日期:2019-03-25
DOI:10.11676/qxxb2019.050
中文关键词:  季节的经验正交函数分解(S-EOF)  冬季气温  月际变化  大气环流异常
英文关键词:S-EOF,Winter temperature,Inter-monthly variation,Anomalous atmospheric circulation
基金项目:国家重点基础研究发展计划,国家973项目
作者单位E-mail
孙健 南京信息工程大学 大气科学学院/气象灾害教育部重点实验室/气象灾害预报预警与评估协同创新中心/气候与环境变化国际合作联合实验室中国气象局旱区特色农业气象灾害监测预警与风险管理重点实验室/宁夏气象局 169150824@qq.com 
李栋梁 南京信息工程大学 大气科学学院/气象灾害教育部重点实验室/气象灾害预报预警与评估协同创新中心/气候与环境变化国际合作联合实验室 lidl@nuist.edu.cn 
邵鹏程  583813086@qq.com 
高娜  284243719@qq.com 
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中文摘要:
      [资料和方法]基于1951~2014年中国160站月气温和NCEP/NCAR再分析资料,利用季节的经验正交函数分解(S-EOF)等方法,[目的]研究了中国冬季气温月际变化的时空演变特征及其对大气环流异常的响应。[结果]结果表明,中国冬季气温在月尺度上常常出现前后冬相反甚至冷暖交替的现象。[结论]中国冬季气温月际变化存在3个主模态:全冬一致型、前后反相型和冷暖交替型。当西伯利亚高压冬季一致偏强(偏弱)时,冬季一致冷(暖);当海陆热力差异由强变弱、西伯利亚高压强度由强变弱,东亚西风急流比较稳定,强度偏强,位置由南向北移动时,冬季前冷后暖;当大气环流发生突变,尤其是海平面气压场和500hPa位势高度场上大气活动中心的频繁调整,西伯利亚高压强度在月时间尺度上强弱交替时,冬季气温呈冷-暖-冷交替变化。
英文摘要:
      By using the monthly temperature data of 160 stations in China from,1951-2014,the NCEP/NCAR reanalysis data at the same time and the method of Season-reliant EOF (S-EOF),the temporal-spatial variation characteristics of winter temperature and its atmospheric circulation anomalies are studied.The results show that On the monthly scale, winter temperatures in China often appear opposite or even alternating between cold and warm.There are 3 typical patterns of winter air temperature variation in China, such as the type of consistent change in the whole winter, the prophase and anaphase reversed type, and the warm-cold alternation type. When the Siberia high is strong or weak in winter, consistent with changes in temperature; When the land-sea thermal differences from strong to weak, Siberia high intensity from strong to weak, the East Asian westerly jet is relatively stable, the intensity is strong and the position of moving from south to north,the winter temperature turns from cold to warm; When the seasonal variation of air circulation, especially is the frequent adjustment of the sea level pressure and geopotential height at 500hPa of atmospheric active centers, Siberia high intensity at the monthly scale or alternate, the temperature in winter is cold-warm-cold alternation.
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