Intraseasonal variability of latent-heat flux in the South China Sea
Zeng, LL; Wang, DX; dxwang@scsio.ac.cn
2009
发表期刊THEORETICAL AND APPLIED CLIMATOLOGY
ISSN0177-798X
卷号97期号:40545页码:53-64
摘要Intraseasonal variability (ISV) of latent-heat flux in the South China Sea (SCS) is examined using 9 years of weekly data from January 1998 to December 2006. Using harmonic and composite analysis, some fundamental features of the latent-heat flux ISVs are revealed. Intraseasonal latent-heat flux has two spectral peaks around 28-35 and 49-56 days, comparable with the timescales of the atmospheric ISV in the region. Active monsoon is clearly correlated with positive and negative phases of the ISV of latent-heat flux in the SCS. The characteristics of the intraseasonal latent-heat flux variations in summer are remarkably different from those in winter. The amplitudes of significant intraseasonal oscillations are about 35 and 80 Wa (TM) m(-2) during summer and winter monsoons, respectively. In summer, the intraseasonal latent-heat flux perturbations are characterized by slow eastward (about 1A degrees latitude/day) and slower northward (about 0.75A degrees longitude/day) propagations, probably in a response to eastward and northward propagating Madden-Julian oscillations (MJOs) from the equatorial Indian Ocean. In contrast, the perturbations appear to remain in the northern SCS region like a quasi-stationary wave in winter. In summer, the intraseasonal latent-heat flux fluctuations are highly correlated with wind speed. In winter, however, they are primarily associated with winds and near-surface air humidity. In addition, the intraseasonal SST variation is estimated to significantly reduce the amplitude of the intraseasonal latent-heat flux by 20% during winter.
部门归属[Zeng, Lili; Wang, Dongxiao] Chinese Acad Sci, Key Lab Trop Marine Environm Dynam, S China Sea Inst Oceanol, Guangzhou 510301, Guangdong, Peoples R China
学科领域Meteorology & Atmospheric Sciences
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收录类别sci
资助项目LED
WOS记录号WOS:000266827700006
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被引频次:33[WOS]   [WOS记录]     [WOS相关记录]
文献类型期刊论文
条目标识符http://ir.scsio.ac.cn/handle/344004/6111
专题热带海洋环境国家重点实验室(LTO)
通讯作者dxwang@scsio.ac.cn
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Zeng, LL,Wang, DX,dxwang@scsio.ac.cn. Intraseasonal variability of latent-heat flux in the South China Sea[J]. THEORETICAL AND APPLIED CLIMATOLOGY,2009,97(40545):53-64.
APA Zeng, LL,Wang, DX,&dxwang@scsio.ac.cn.(2009).Intraseasonal variability of latent-heat flux in the South China Sea.THEORETICAL AND APPLIED CLIMATOLOGY,97(40545),53-64.
MLA Zeng, LL,et al."Intraseasonal variability of latent-heat flux in the South China Sea".THEORETICAL AND APPLIED CLIMATOLOGY 97.40545(2009):53-64.
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