| 西太平洋暖池在不同天气系统下的海气交换差异 |
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| 引用本文： | 高登义,周立波.西太平洋暖池在不同天气系统下的海气交换差异[J].大气科学,1997,21(3):257-265. |
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| 作者姓名： | 高登义 周立波 |
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| 作者单位： | 中国科学院大气物理研究所,北京 100029 |
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| 摘 要： | 为了进一步了解海气交换在不同天气系统下的差异，本文利用TOGA-COARE IOP考察期间实测资料和国家气象中心逐日的网格点资料，对西太平洋赤道海域的大尺度热量和水汽收支及其他物理量的特征进行分析后指出:（1）在强对流天气系统下加热率、干燥率、垂直速度、散度等物理量强度达到最大，平稳天气系统下次之；此时大气加热主要是由于凝结降水释放的潜热引起的。（2）在西风爆发过程中加热率和平稳天气过程中的量级相同，但干燥率远小于加热率，且为负值；此时表面感热通量和表面蒸发达到最强（大于凝结降水的加热作用），从而造成了在大气低层出现水汽源。
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| 关 键 词： | 西太平洋暖池 海气交换 视热源 视水汽汇 |
The Air-Sea Exchange Difference of the Warm Pool of the Western Pacific Under the Different Weather Systems |
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| Gao Dengyi and Zhou Libo.The Air-Sea Exchange Difference of the Warm Pool of the Western Pacific Under the Different Weather Systems[J].Chinese Journal of Atmospheric Sciences,1997,21(3):257-265. |
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| Authors: | Gao Dengyi and Zhou Libo |
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| Abstract: | This article attempts to analyze the large-scale heat and moisture budgets in the equatorial western Pacific using observation data during TOGA-COARE and the daily grid data from the National Meteorological Center of China (NMCC). In this study, the detail physical parameters of the air-sea exchange in different weather systems are analyzed. Under strong convection conditions, the heating ratio, drying ratio and other parameters, such as the vertical velocity and divergence, etc., are stronger than those under other conditions. The reason could be the release of the latent heat in the condensation precipitation. Nevertheless, in westerly outbreak system, the heating ratio is as much as that of the stable weather system, the drying ratio is the least (negative) among the weather systems. Both the surface sensible and the evaporation heat flux are the strongest in the westerly outbreak system which causes a vapor source in the lower layer of atmosphere. |
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| Keywords: | warm pool of the western Pacific air-sea exchange apparent heating source apparent moist sink |
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