Trends in Summer Rainfall over China Associated with the Tibetan Plateau Sensible Heat Source during 1980-2008

被引:228
作者
Duan, Anmin [1 ]
Wang, Meirong [2 ]
Lei, Yonghui [3 ]
Cui, Yangfan [1 ]
机构
[1] Chinese Acad Sci, Inst Atmospher Phys, State Key Lab Numer Modelling Atmospher Sci & Geo, Beijing 100029, Peoples R China
[2] Univ Chinese Acad Sci, Inst Atmospher Phys, State Key Lab Numer Modelling Atmospher Sci & Geo, Beijing, Peoples R China
[3] Chinese Acad Sci, Inst Remote Sensing Applicat, State Key Lab Remote Sensing Sci, Beijing 100029, Peoples R China
基金
中国国家自然科学基金;
关键词
QINGHAI-XIZANG PLATEAU; CLIMATE PATTERNS; MONSOON RAINFALL; SPRING SNOW; EAST CHINA; PART I; PRECIPITATION; CIRCULATION; SCHEME; ASIA;
D O I
10.1175/JCLI-D-11-00669.1
中图分类号
P4 [大气科学(气象学)];
学科分类号
070601 [气象学];
摘要
The impacts of the thermal forcing over the Tibetan Plateau (TP) in spring on changes in summer rainfall in China are investigated using historical records from the period between 1980 and 2008. The spring sensible heat (SH) flux and snow depth over the TP both decreased over this time period, although the trend in SH was more significant than that in snow depth. The similarity between patterns of precipitation trends over China and corresponding patterns of regression coefficients on the leading mode of spring SH change over the TP demonstrates the distinct contribution of changes in TP SH during spring. Enhanced precipitation in southern China was accompanied by increases in heavy rainfall, precipitation intensity, and the frequency of precipitation events, while reduced precipitation in northern China and northeastern China was primarily associated with decreases in the frequency of precipitation events. Further analysis using observational data and numerical simulations reveals that the reductions in SH over the TP have weakened the monsoon circulation and postponed the seasonal reversal of the land-sea thermal contrast in East Asia. In addition, the positive spring SH anomaly may generate a stronger summer atmospheric heat source over the TP due to the positive feedback between diabatic heating and local circulation.
引用
收藏
页码:261 / 275
页数:15
相关论文
共 57 条
[1]
[Anonymous], 1979, Meteorology of the Qinghai-Xizang (Tibet) plateau
[2]
[Anonymous], THESIS CHINESE ACAD
[3]
[Anonymous], SICHUAN MENTAL HLTH
[4]
BLAKE DW, 1983, MON WEATHER REV, V111, P1759, DOI 10.1175/1520-0493(1983)111<1759:HLOTSA>2.0.CO
[5]
2
[6]
Chang CP, 2000, J CLIMATE, V13, P4310, DOI 10.1175/1520-0442(2000)013<4310:IAIVOT>2.0.CO
[7]
2
[8]
Chen LT, 2000, ADV ATMOS SCI, V17, P18
[9]
[戴福山 Dai Fushan], 2004, [气象学报, Acta Meteorologica Sinica], V62, P385
[10]
Inter-decadal variation of the summer precipitation in East China and its association with decreasing Asian summer monsoon. Part I: Observed evidences [J].
Ding, Yihui ;
Wang, Zunya ;
Sun, Ying .
INTERNATIONAL JOURNAL OF CLIMATOLOGY, 2008, 28 (09) :1139-1161