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| 两种反映东亚夏季风异常的指数的比较研究 | |
| 引用本文： | 李峰 孙秀荣 等. 两种反映东亚夏季风异常的指数的比较研究[J]. 气象科学, 2001, 21(2): 178-185 |
| 作者姓名： | 李峰 孙秀荣 等 |
| 作者单位： | 1. 南京气象学院, 2. 上海气象科学研究所,上海 200030 3. 国家气象中心, |
| 摘 要： | 本文利用文献^ [4]提出的一种新的反映东亚夏季风异常的海陆温差指数分析了夏季风异常时我国气温、降水异常以及东亚环流状况，通过分析指出，东亚夏季风偏强，则中国东部夏季气温偏高，江淮干旱，华北多雨；夏季风偏弱则夏季气温偏低，江淮多雨，易涝，华北少雨。通过两种夏季风指数的对比，海陆温差指数能更好地反映东亚夏季环流及天气气候异常。文中还指出，海陆温差指数能更好的反映夏季风异常的原因是它的定义方法更科学，更全面的反映东亚海陆热力差异，既包含了东亚纬向海陆热力差异的影响，又考虑了东亚经向海陆热力差异的因素，并用地表气温和海表温度差来表示海陆热力差，好于以往用海平面气压差来反映海陆热力差。 |
| 关 键 词： | 东亚夏季风 海陆温差指数 夏季风强度指数 原因 地表气温 海表气温 |
| 修稿时间： | 2000-03-25 |
TWO EAST-ASIAN SUMMER MONSOON INDEXES COMPARE AND CONTRAST RESEARCH |
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| Li Feng. TWO EAST-ASIAN SUMMER MONSOON INDEXES COMPARE AND CONTRAST RESEARCH[J]. Journal of the Meteorological Sciences, 2001, 21(2): 178-185 | |
| Authors: | Li Feng |
| Abstract: | Based on a new Land Sea Temperature Difference index (LSTD), East Asian monsoon anomaly was analysed .The results indicate that when summer monsoon is strong,temperature will be high,drought occurs in east China,there are lots of rainfall in north China,the reverses are true during weak summer monsoon.By comparing of two kinds of indexes,land sea temperature difference index is superior to Summer Monsoon Index (SMI) because that method of definition of LSTD is reasonable.It included both zonal land sea temperature difference and meridional land sea temperature difference in East Asian region.It is land temperature and SST that are used to compute land sea temperature difference,not traditional SLP difference for land sea temperature difference. |
| Keywords: | East Asian summer monsoon Land sea temperature difference Summer monsoon index |
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