| 西北地区夏季降水异常及其水汽输送和环流特征分析 |
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| 引用本文： | 何金海,刘芸芸,常越.西北地区夏季降水异常及其水汽输送和环流特征分析[J].甘肃气象,2005,23(1):10-16. |
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| 作者姓名： | 何金海 刘芸芸 常越 |
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| 作者单位： | [1]南京信息工程大学大气科学系，江苏南京210044 [2]南京信息工程大学大气科学系，江苏南京210044／／广东省广州市气象局，广东广州510080 |
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| 基金项目： | 宁夏科技攻关重点项目“我区天气异常与突变规律的诊断及监测预警技术”资助 |
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| 摘 要： | 利用NCEP/NCAR 1951～2000年共50a的再分析资料及我国西北地区内31个代表站的降水资料，对西北地区近50a来夏季降水异常的时空特征、环流形势及水汽输送进行了研究。分析发现，西北地区夏季降水异常与东部沿海地区的降水呈反位相分布，说明西北地区和东部沿海地区的降水影响系统不同，影响时期不一致。分析结果表明，影响西北地区夏季多、少雨年的相关区域环流特征和水汽输送特征有显著差异。
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| 关 键 词： | 西北地区 夏季降水异常 环流特征 水汽输送 |
| 文章编号： | 1006-7639(2005)-01-0010-07 |
| 修稿时间： | 2005年1月11日 |
Analysis of Summer Precipitation Anomaly and the Feature of Water Vapor Transport and Circulation in Northwest China |
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| HE Jin-hai ,LIU Yun-yun ,CHANG Yue.Analysis of Summer Precipitation Anomaly and the Feature of Water Vapor Transport and Circulation in Northwest China[J].Gansu Meteorology,2005,23(1):10-16. |
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| Authors: | HE Jin-hai LIU Yun-yun CHANG Yue |
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| Institution: | HE Jin-hai 1,LIU Yun-yun 1,CHANG Yue 1,2 |
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| Abstract: | Summer precipitation anomaly and the feature of water vapor transport and circulation in Northwest China are studied by using the NCEP/NCAR reanalysis data from 1951 to 2000 and rainfall observations of 31 representative stations in Northwest China. It is found that the phases between precipitation anomaly in Northwest China and that in east coast of China are opposite, and the influencing systems and periods to summer rainfall are different between those two aeras. Results show that the circulation and water vapor transport of dry years in the related areas are significantly different from those of wet years. |
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| Keywords: | Northwest China summer precipitation anomaly circulation features water vapor transport |
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