High-frequency atmospheric variability over South China Sea as depicted by TRMM and QuikSCAT |
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Authors: | LI Weibiao WANG Dongxiao LEI Ting LIU Zijie and LUO Cong |
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Institution: | 1.Department of Atmospheric Sciences, Sun Yat-Sen University, Guangzhou, 510275, China2.LED, South China Sea Institute of Oceanology, Chinese Academy of Sciences, Guangzhou 510301, China |
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Abstract: | By using the TRMM and QuikSCAT datathe characteristics of the 2-8 day high frequency atmo-
spheric variability over the South China Sea are studied in this paper. It's found that: (1) the 2-8
day high frequency signals are significant not only during the periods of the South China Sea Sum-
mer Monsoon (SCSSM), but also after the retreat of the SCSSM. It reaches its peak around July
to August; (2) the 2-8 day high frequency signals exhibit strong intermittent features; (3) During
El Nino years, the 2-8 day high frequency signals are active only in the periods of the SCSSM.
During La Nina years, the 2-8 day high frequency signals are obviously not only in periods of the
SCSSM, but also after the retreat of the SCSSM. During the SCSSM periods, the 2-8 day high
frequency signals in El Nino years are much stronger than that in La Nina years; (4) During spring
to early summer, most of 2-8 day signals propagate southward and eastward, during midsummer
to autumn, however, most of 2-8-day signals propagate northward and westward; (5) The 2-8 day
northward and westward propagation signals is probably related to the activities of high-frequency
vortex over the SCS. |
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Keywords: | high-frequency atmospheric variability South China Sea TRMM QuikSCAT |
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