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Volume 18 Issue 6

Nov.  2001

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Article >  ADVANCES IN ATMOSPHERIC SCIENCES  > 2001 >  18(6): 1146-1160

Strong/Weak Summer Monsoon Activity over the South China Sea and Atmospheric Intraseasonal Oscillation

  • 1.

    LASG, Institute of Atmospheric Physics, Chinese Academy of Science, Beijing 100029,LASG, Institute of Atmospheric Physics, Chinese Academy of Science, Beijing 100029,LASG, Institute of Atmospheric Physics, Chinese Academy of Science, Beijing 100029


doi: 10.1007/s00376-001-0029-x

  • The circulation pattern corresponding to the strong / weak summer monsoon in the South China Sea (SCS) region and the associated characteristics of the abnormal rainfall in Eastern China have been studied by using the NECP reanalysis data and precipitation data in China. The results show that the climate variations in China caused by the strong/weak summer monsoon are completely different (even in opposite phase). The analyses of atmospheric intraseasonal oscillation (ISO) activity showed that the atmospheric ISO at 850 hPa near the SCS region is strong (weak) corresponding to the strong (weak) SCS summer monsoon. And the analyses of the circulation pattern of the atmospheric ISO showed that the strong / weak SCS summer monsoon circulation (200 hPa and 850 hPa) result mainly from abnormal atmospheric ISO.This study also reveals that the atmospheric ISO variability in the South China Sea region is usually at opposite phase with one in the Jiang-huai River basin. For example, strong (weak) atmospheric ISO in the SCS region corresponds to the weak (strong) atmospheric ISO in the Jiang-huai River basin. As to the intensity of atmospheric ISO, it is generally exhibits the local exciting characteristics, the longitudinal propagation is weak.
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    [2] Yining Gu, Ruifen Zhan, Xiaomeng Li, 2024: Environmental conditions conducive to the formation of Multiple Tropical Cyclones over the Western North Pacific, ADVANCES IN ATMOSPHERIC SCIENCES.  doi: 10.1007/s00376-024-3237-4
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    [5] Yuli ZHANG, Chuanxi LIU, Yi LIU, Rui YANG, 2019: Intraseasonal Oscillation of Tropospheric Ozone over the Indian Summer Monsoon Region, ADVANCES IN ATMOSPHERIC SCIENCES, 36, 417-430.  doi: 10.1007/s00376-018-8113-7
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    [9] YANG Jing, BAO Qing, WANG Xiaocong, ZHOU Tianjun, 2012: The Tropical Intraseasonal Oscillation in SAMIL Coupled and Uncoupled General Circulation Models, ADVANCES IN ATMOSPHERIC SCIENCES, 29, 529-543.  doi: 10.1007/s00376-011-1087-3
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    [12] HU Wenting, DUAN Anmin, and WU Guoxiong, 2013: Performance of FGOALS-s2 in Simulating Intraseasonal Oscillation over the South Asian Monsoon Region, ADVANCES IN ATMOSPHERIC SCIENCES, 30, 607-620.  doi: 10.1007/s00376-013-2156-6
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    • Manuscript History

    Manuscript received: 10 November 2001
    Manuscript revised: 10 November 2001
    通讯作者: 陈斌, bchen63@163.com
    • 1. 

      沈阳化工大学材料科学与工程学院 沈阳 110142

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    Strong/Weak Summer Monsoon Activity over the South China Sea and Atmospheric Intraseasonal Oscillation

    • 1. LASG, Institute of Atmospheric Physics, Chinese Academy of Science, Beijing 100029,LASG, Institute of Atmospheric Physics, Chinese Academy of Science, Beijing 100029,LASG, Institute of Atmospheric Physics, Chinese Academy of Science, Beijing 100029
    • Manuscript received: 2001-11-10
    • Manuscript revised: 2001-11-10

    Abstract: The circulation pattern corresponding to the strong / weak summer monsoon in the South China Sea (SCS) region and the associated characteristics of the abnormal rainfall in Eastern China have been studied by using the NECP reanalysis data and precipitation data in China. The results show that the climate variations in China caused by the strong/weak summer monsoon are completely different (even in opposite phase). The analyses of atmospheric intraseasonal oscillation (ISO) activity showed that the atmospheric ISO at 850 hPa near the SCS region is strong (weak) corresponding to the strong (weak) SCS summer monsoon. And the analyses of the circulation pattern of the atmospheric ISO showed that the strong / weak SCS summer monsoon circulation (200 hPa and 850 hPa) result mainly from abnormal atmospheric ISO.This study also reveals that the atmospheric ISO variability in the South China Sea region is usually at opposite phase with one in the Jiang-huai River basin. For example, strong (weak) atmospheric ISO in the SCS region corresponds to the weak (strong) atmospheric ISO in the Jiang-huai River basin. As to the intensity of atmospheric ISO, it is generally exhibits the local exciting characteristics, the longitudinal propagation is weak.

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