| 有关东亚夏季风北边缘的定义及其特征 |
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| 引用本文： | 汤绪,陈葆德,梁萍,钱维宏. 有关东亚夏季风北边缘的定义及其特征[J]. 气象学报, 2009, 67(1): 83-89 |
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| 作者姓名： | 汤绪 陈葆德 梁萍 钱维宏 |
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| 作者单位： | 上海市气象局,上海,200030;中国气象局上海台风研究所,上海,200030;上海市气候中心,上海,200030;北京大学物理学院大气科学系,北京,100871 |
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| 基金项目： | 国家自然科学基金,中国气象局气候变化专项项目 |
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| 摘 要： | 采用欧洲中心(ECMWF)44年冉分析(ERA40)日总可降水量(TPW)资料,用标准化可降水量指数(NPWI)定义了夏季风北边缘,并进一步研究了亚洲夏季风北边缘的气候特征及其年际、年代际变化特征.结果表明,用标准化町降水量指数定义的夏季风北边缘在哑洲可以确定出印度夏季风系统和东亚夏季风系统;就夏季风北边缘的平均位置而言,其在100°E以西沿青藏高原南侧呈东一西走向,年际变化极小;在100°E以东呈东北-西南走向,从青藏高原东侧北上经西北地区东部、华北地区北部、东北地区西部延伸到东北亚地区,并存在明显的年际、年代际变化.
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| 关 键 词： | 可降水量 东亚夏季风 季风北边缘定义 |
| 收稿时间： | 2007-04-16 |
| 修稿时间： | 2007-09-06 |
Definition and features of the north edge of Asian summer monsoon |
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| TANG Xu,CHEN Baode,LIANG Ping and QIAN Weihong. Definition and features of the north edge of Asian summer monsoon[J]. Acta Meteorologica Sinica, 2009, 67(1): 83-89 |
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| Authors: | TANG Xu CHEN Baode LIANG Ping QIAN Weihong |
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| Affiliation: | TANG Xu CHEN Baode LIANG Ping QIAN Weihong 1.Shanghai Meteorological Bureau,Shanghai 200030,China 2.Shanghai Typhoon Institute,China 3.Shanghai Climate Center,China 4.Department of Atmospheric Sciences,Institute of Physics,Peking University,Beijing 100871,China |
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| Abstract: | By using the daily total precipitable water amount(TPW) from the ECMWF reanalysis(ERA40) in 1958-2001,the north edge of the Asian sub-tropical summer monsoon was defined by a normalized precipitable water index(NPWI),and its climatology and interannual/interdecadal variability were examined.Results show that two monsoon systems(the Indian monsoon system and the East Asian monsoon system) can be identified in terms of the north edge of Asian summer monsoon defined by the NPWl.The mean north edge goes eastwar... |
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| Keywords: | Precipitable water Asian summer monsoon Definition of north edge |
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