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, 77(5):885-897, 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 relation with atmospheric circulation anomalies
投稿时间:2018-03-28  修订日期:2019-04-12
DOI:10.11676/qxxb2019.050
中文关键词:  季节的经验正交函数分解  冬季气温  月际变化  大气环流异常
英文关键词:S-EOF  Winter air temperature  Inter-monthly variation  Anomalous atmospheric circulation
基金项目:国家重点研发计划项目(2018YFC1505602)。
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, 南京, 210044
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, 银川, 750001 
 
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, 南京, 210044 lidl@nuist.edu.cn 
邵鹏程 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, 南京, 210044
国家气候中心/中国气象局气候研究开放实验室, 北京, 100081 
 
高娜 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, 银川, 750001  
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中文摘要:
      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,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。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500 hPa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:
      The method of Season-reliant EOF (S-EOF) is applied to analyze monthly temperature data collected at 160 stations in China from 1951-2014 and the NCEP/NCAR reanalysis data during the same period. The temporal-spatial variation of winter temperature and its relation with atmospheric circulation anomalies are studied. The results show that on the monthly scale, winter temperature in China often exhibits opposite pattern between prophase and anaphase of the winter, and even alternates between cold and warm. There are three typical patterns of winter air temperature variation in China, i.e., the pattern of consistent change in the whole winter, the reversed pattern between prophase and anaphase, and the warm-cold alternation pattern. When the Siberia high is strong (weak) in winter, temperature is cold (warm) correspondingly; when the land-sea thermal difference changes from strong to weak, the Siberia high intensity changes from strong to weak, too; when the East Asian westerly jet is relatively stable and strong and moves from south to north, the winter air temperature varies from cold to warm; when the seasonal variation of the atmospheric circulation is large, especially when the sea level pressure and active centers at 500 hPa geopotential height change frequently, and the Siberia high alternates between weak and strong on the monthly scale, the temperature in winter undergoes cold-warm-cold alternation.
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