Peculiar temporal structure of the South China Sea summer monsoon

被引：106

作者：

Wang B. ^{[1
,2
]}

Wu R. ^{[1
]}

机构：

[1] Department of Meteorology, University of Hawaii

[2] Department of Meteorology, University of Hawaii, Honolulu, HI 96822

来源：

Advances in Atmospheric Sciences | 1997年 / 14卷 / 2期

基金：

美国国家科学基金会;

关键词：

Bi-modal interannual variation; Monsoon over SCS; Spectrum of precipitation; Subseasonal cycles;

D O I：

10.1007/s00376-997-0018-9

中图分类号：

学科分类号：

摘要：

Beijing located at the junction of four major components of the Asian-Australia monsoon system (the Indian, the western North Pacific, the East Asian subtropical, and the Indonesian-Australian monsoons), the monsoon climate over the South China Sea (SCS) exhibits some unique features. Evidences are presented in this paper to reveal and document the following distinctive features in the temporal structure of the SCS summer monsoon: (1) pronounced monsoon singularities in the lower tropospheric monsoon flows which include the pre-onset and withdrawal easterly surges and the southwesterly monsoon bursts at Julian pentad 34-35 (June 15-24) and pentad 46-47 (August 14-23); (2) four prominent subseasonal cycles (alternative occurrences of climatological active and break monsoons); (3) considerably larger year-to-year variations in convective activity on intraseasonal time scale compared to those over the Bay of Bengal and the Philippine Sea; (4) the redness of the climatological mean spectrum of precipitation / deep convection on synoptic to intraseasonal time scales in the central SCS; (5) a remarkable asymmetry in the seasonal transitions between summer and winter monsoons and an extremely abrupt mid-May transition (the outburst of monsoon rain and the sudden switch in the lower troposphere winds from an easterly to a westerly regime); (6) the bi-modal interannual variation of summer monsoon onset (normal and delayed modes). In addition, the monsoon rainfall displays enormous east-west gradient over the central SCS. Possible causes for these features are discussed. A number of specific science questions concerning some of the peculiar features are raised for the forthcoming SCS monsoon experiment to address.

引用

页码：177 / 194

页数：17

共 23 条

[1] Ding Y.-H., Summer monsoon rainfall in China, J. Meteor. Soc. Japan, 70, pp. 373-396, (1992)
[2] Garcia O., Atlas of Highly Reflective Clouds for the Global Tropics: 1971-1983, (1985)
[3] Gill A.E., Some simple solutions for heat induced tropical circulation, Quart. J. Royal. Meteor. Soc., 106, pp. 447-463, (1980)
[4] Huang R.H., Li W.J., The effect of heat source anomaly over the tropical western Pacific during summer, Chinese J. Atmos. Sci., SPEC. ISSUE, (1988)
[5] Huang Z., Tao S.Y., Diagnostic study of the bursting processes of Asian summer monsoon in 1983, Acta Meteor. Sinica, 50, pp. 210-217, (1992)
[6] Kilonsky B.J., Ramage C.S., A technique for estimating tropical open-ocean rainfall from satellite observations, J. Appl. Meteor., 15, pp. 972-976, (1976)
[7] Krishnamurti T.N., Summer monsoon experiment, a review, Mon. Wea. Rev., 113, pp. 1590-1626, (1985)
[8] Lau K.-M., Peng L., Dynamics of atmospheric teleconnection during northern summer, J. Atmos. Sci., 5, pp. 140-158, (1992)
[9] Lau K.-M., Yang S., Climatology and interannual variability of Southeast Asian summer monsoon, Advances in Atmospheric Sciences, 14, 2, pp. 141-162, (1997)
[10] Matsumoto J., Climate over Asian and Australian Monsoon Regions, (1992)

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