气象2017，Vol.43Issue(11)：1393-1401,9.DOI:10.7519/j.issn.1000-0526.2017.11.008
中国夏季气温变化的主模态及环流特征分析
Dominant Modes of Summer Temperature over China and Its Associated Circulation Anomalies
摘要
Abstract
Based on the monthly mean temperature data at 284 China stations and NCEP/NCAR reanalysis dataset,the dominant modes of three months' temperature in summer and their associated circulation anomalies are investigated with empirical orthogonal function (EOF),composite analysis and other statistical methods.The three dominant modes can be calculated from EOF.The first mode (EOF1) depicts a uniform mode (UM) from north to south over China.The second mode (EOF2) depicts a tripole mode (TM) between Inner Mongolia,North China,South China and the middle-lower reaches of the Yangtze River.The third mode (EOF3) depicts a dipole mode between the north part and south part to the Yangtze River.The major circulation characteristics related with the three modes are different.UM is attributed to the equivalent barotropic atmosphere feature.The potential height anomaly shows the same tendency from the lower troposphere to the lower stratosphere over East Asia.TM is attributed to the East Asia-Pacific (EAP) teleconnection pattern and the stratosphere height field anomaly in early spring can be used as a precursor for summer TM.The location and intensity of the West Pacific subtropical high and northeast cold vortex are very important to DM.关键词
夏季/气温/一致型/三极子型/偶极型Key words
summer/temperature/uniform mode (UM)/tripole mode (TM)/dipole mode (DM)分类
天文与地球科学引用本文复制引用
张灵,陈丽娟,周月华,熊开国..中国夏季气温变化的主模态及环流特征分析[J].气象,2017,43(11):1393-1401,9.基金项目
公益性行业(气象)科研专项(GYHY201306021)、国家重点基础研究发展计划(973计划)(2015CB453203)和国家自然科学基金项目(41275073)共同资助 （气象）
