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South China Sea summer monsoon onset in relation to the off-equatorial ITCZ |
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| Authors: | Zhou Wen Johnny Chung-Leung Chan Li Chongyin |
| Institution: | State Key Laboratory of Numerical Modeling for Atmospheric Sciences and Geophysical Fluid Dynamics (LASG),Institute of Atmospheric Physics, Chinese Academy of Sciences, Beijing 100029;Laboratory for Atmospheric Research, Department of Physics and Materials Science, City University of Hong Kong, Hong Kong,Laboratory for Atmospheric Research, Department of Physics and Materials Science, City University of Hong Kong, Hong Kong,State Key Laboratory of Numerical Modeling for Atmospheric Sciences and Geophysical Fluid Dynamics (LASG),Institute of Atmospheric Physics, Chinese Academy of Sciences, Beijing 100029;Institute of Meteorology, PLA University of Science and Technology, Nanjing 211101 |
| Abstract: | Observations of the South China Sea summer monsoon (SCSSM) demonstrate the different features between the early and late onsets of the monsoon. The determining factor related to the onset and the resultant monsoon rainfall might be the off-equatorial ITCZ besides the land-sea thermal contrast. The northward-propagating cumulus convection over the northern Indian Ocean could enhance the monsoon trough so that the effect of the horizontal advection of moisture and heat is substantially increased, thus westerlies can eventually penetrate and prevail over the South China Sea (SCS) region. |
| Keywords: | SCSSM onset off-equatorial ITCZ land-sea thermal contrast |
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