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学科主题: Meteorology & Atmospheric Sciences
题名: Intraseasonal variability of latent-heat flux in the South China Sea
作者: Zeng, LL ; Wang, DX
通讯作者: dxwang@scsio.ac.cn
刊名: THEORETICAL AND APPLIED CLIMATOLOGY
发表日期: 2009
卷: 97, 期:40545, 页:53-64
收录类别: sci
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
项目归属: LED
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.
原文出处: 查看原文
WOS记录号: WOS:000266827700006
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内容类型: 期刊论文
URI标识: http://ir.scsio.ac.cn/handle/344004/6111
Appears in Collections:热带海洋环境动力实验室(LTO)_期刊论文

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Recommended Citation:
Zeng, LL; Wang, DX.Intraseasonal variability of latent-heat flux in the South China Sea,THEORETICAL AND APPLIED CLIMATOLOGY,2009,97(40545):53-64
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