| 热带西太平洋暖池的热状态及其上空的对流活动对东亚夏季气候异常的影响 |
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| 引用本文： | 黄荣辉,孙凤英.热带西太平洋暖池的热状态及其上空的对流活动对东亚夏季气候异常的影响[J].大气科学,1994,18(2):141-151. |
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| 作者姓名： | 黄荣辉 孙凤英 |
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| 作者单位： | 中国科学院大气物理研究所，北京 100080,中国科学院大气物理研究所，北京 100080 |
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| 摘 要： | 本文利用１９７８－１９８９年热带西太平洋暖池的表层与次表?层海温、高云量与降水等观测资料分析了热带西太平洋暖池的热状态及其上空的对流活动对东亚夏季气候异常的影响。分析结果表明：热带西太平洋暖池的热状态及其上空的对流活动对东亚夏季气候异常起着十分重要的作用。当热带西太平洋暖池增暖时，从菲律宾周围经南海到中印半岛上空的对流活动将增强，西太平洋副热带高压的位置偏北，我国江淮流域夏季降水偏少；反之，则菲律宾周围的对流活动减弱，副热带高压偏南，江淮流域的降水偏多，黄河流域的降水偏少，易发生干旱。观测事实还表明，当热带西太平洋暖池上空的对流增强后，从东南亚、经东亚到北美西海岸上空大气环流的异常呈现出一个遥相关型—东亚太平洋型。
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| 关 键 词： | 暖池 对流活动 遥相关 副热带高压 |
Impacts of the Thermal State and the Convective Activities in the Tropical Western Warm Pool on the Summer Climate Anomalies in East Asia |
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| Huang Ronghui and Sun Fengying.Impacts of the Thermal State and the Convective Activities in the Tropical Western Warm Pool on the Summer Climate Anomalies in East Asia[J].Chinese Journal of Atmospheric Sciences,1994,18(2):141-151. |
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| Authors: | Huang Ronghui and Sun Fengying |
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| Abstract: | In this paper, impacts of the thermal state in the western tropical Pacific warm pool and the convective activities over the warm pool on the summer climate anonialies in East Asia ate analysed by using the observed data of the sea temperatare in surface and subsurface of the westem tropical Pacific warm pool, the high cloud amount and precipitation for 1978-1989. The analysed results show that the thermal state in the tropical western Pacific warm pool and the convective activities over the warm pool play an important role in the summer climate anomalies in East Asia. When the western tropical Pacific warm pool is warming, the convective activities are intensified from the area around the Philippines to the Indo-China Peninsula through the South China Sea, the western Pacific subtropical high may shift nortbward, the summer rainfall may be below normal in the Yangtze River valley and the Huaihe River valley. On the Contrary, the convective activities are weak around the Philippines, the western Pacific subtropical high may shift southward, the summer rainfall may be above normal and it may be below normal in the Yellow River valley, drought summer is frequently caused there.The observational facts also show that after the enhancement of the convective activities over the western tropical Pacific warm pool, there is a teleconnection pattern in the circu1ation anomalies over the regions from Southeast Asia to the western Coast of North America through East Asia, i.e., the so-called East Asia / Pacific Pattern. |
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| Keywords: | warm pool convective activities teleconnection subtropical high |
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