The variation characteristics of air-sea fluxes over the Xisha area before and after the Onset of the South China Sea monsoon in 2008

SUN Qi-zhen; CHEN Jin-nian; YAN Jun-yue; ZHANG Xiu-zhi; HUANG Lei; WANG Chang-ke; YAO Hua-dong; ZHAO Xue-hua; CHEN Chang-qiu

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Article Navigation > Haiyang Xuebao > 2010 > 32(4): 12-23

SUN Qi-zhen, CHEN Jin-nian, YAN Jun-yue, ZHANG Xiu-zhi, HUANG Lei, WANG Chang-ke, YAO Hua-dong, ZHAO Xue-hua, CHEN Chang-qiu. The variation characteristics of air-sea fluxes over the Xisha area before and after the Onset of the South China Sea monsoon in 2008[J]. Haiyang Xuebao, 2010, 32(4): 12-23.

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The variation characteristics of air-sea fluxes over the Xisha area before and after the Onset of the South China Sea monsoon in 2008

1.
Institute of Oceanology, Chinese Academy of Sciences, Qingdao 266071, China;Key Laboratory of Ocean Circulation and Waves(KLOCAW), Chinese Academy of Sciences, Qingdao 266071, China;Graduate University of the Chinese Academy of Sciences, Beijing 100049, China
2.
Institute of Oceanology, Chinese Academy of Sciences, Qingdao 266071, China;Key Laboratory of Ocean Circulation and Waves(KLOCAW), Chinese Academy of Sciences, Qingdao 266071, China;Institute of Tropical and Oceanic Meteorology, China Meteorological Administration, Guangzhou 510080, China
3.
National Climate Center, Beijing 100081, China
4.
Xisha Observatory, Paracel Islands 573100, China

Received Date: 2009-08-15

Abstract

Abstract

Based on the datasets from NCEP and the South China Sea (SCS) air-sea flux measurement which was carried out from April, 2008, the air-sea fluxes were calculated with COARE3.0 algorithm, and the characteristics of the weather and how the air-sea fluxes varied with the variations of atmosphere and ocean elements before and during the onset of the SCS monsoon were discussed.The results indicated that, the onset of the SCS monsoon in the 2008 appeared firstly in the southern part of SCS at early May, and then owing to influence of a tropical cyclone the onset of monsoon in the northern part of SCS was remitted to 18^th May.Influence of the onset of monsoon and tropical cyclone activity on wind speed and air-sea fluxes was remarkable.By comparison, influence of the tropical cyclone activity on air-sea fluxes was stronger.Before the tropical cyclone, the latent heat flux and sensible heat flux and momentum flux were quite low.During the tropical cyclone and the onset of SCS monsoon, the latent heat flux and momentum flux increased greatly because of the strong wind while the sensible heat flux increased in the days when it rained.The momentum flux maximized during the tropical cyclone and was twice bigger than that before the onset of SCS monsoon.The latent heat flux was sixteen times as much as the sensible heat flux during the entire observation.In different types of weather, the latent heat flux had similar diurnal distribution while the sensible heat flux varied a lot.Besides, the close correlation between the transfer coefficients and wind speed was found.
- the onset of SCS monsoon,
- air-sea fluxes,
- COARE3.0 algorithm

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