Intraseasonal variability of latent-heat flux in the South China Sea

CORC > 南海海洋研究所 > 中国科学院南海海洋研究所 > 热带海洋环境国家重点实验室(LTO)

	Intraseasonal variability of latent-heat flux in the South China Sea
	Zeng, LL ; Wang, DX
刊名	THEORETICAL AND APPLIED CLIMATOLOGY
	2009
卷号	97 期号:40545 页码:53-64
ISSN号	0177-798X
通讯作者	dxwang@scsio.ac.cn
中文摘要	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.
学科主题	Meteorology & Atmospheric Sciences
收录类别	SCI
原文出处	SPRINGER WIEN
WOS记录号	WOS:000266827700006
公开日期	2011-07-03
内容类型	期刊论文
源URL	[http://ir.scsio.ac.cn/handle/344004/6111]
专题	南海海洋研究所_热带海洋环境国家重点实验室(LTO)
推荐引用方式 GB/T 7714	Zeng, LL,Wang, DX. 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.(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.