气象学报2013，Vol.71Issue(2)：295-304,10.DOI:10.11676/qxxb2013.017
基于拉格朗日方法的江淮梅雨水汽输送特征分析
Analysis of water vapor transport characteristics during the Meiyu over the Yangtze-Huaihe River valley using the Lagrangian method
摘要
Abstract
Using the NCEP reanalysis data and the airflow trajectory model based on the Lagrangian method (HYSPLIT_4.9),the climatological characteristics of water vapor transport associated with the Meiyu and its differences in the abnormal years have been discussed in this paper.The results showed that the water vapor of the Meiyu mainly come from the Bay of Bengal-South China Sea,the Indian Ocean,the Pacific region and the Eurasian continent,accounting for 19％,35％,22％ and 19％ of the total moisture transport,respectively.Among of them,the water vapor over the Indian Ocean,the Bay of Bengal-South China Sea and the Pacific Ocean are from the lower troposphere under the 850 hPa,while the water vapor over the Eurasian continent comes from the middle troposphere.Besides,by comparing with the differences in the abnormal years,we found that water vapors from the Bay of Bengal-South China Sea,the India ocean,and the Pacific region have import influences on the Meiyu anomalies.In wet Meiyu years,water vapor coming from the Bay of Bengal-South China Sea is more by 13％ than that in dry Meiyu years,reaching to 24％,but for the areas of the Pacific and India Oceans in dry years,the contribution rates of water vapor are 40％ and 30％ respectively.关键词
江淮梅雨/水汽输送/拉格朗日轨迹Key words
The Meiyu over the Yangtze-Huaihe River valley/ Water vapor transportation/ Lagrangian trajectory分类
天文与地球科学引用本文复制引用
江志红,任伟,刘征宇,杨浩..基于拉格朗日方法的江淮梅雨水汽输送特征分析[J].气象学报,2013,71(2):295-304,10.基金项目
公益性行业(气象)科研专项(GYHY200906016)、国家重点基础研究发展计划项目(2010CB950401)、国家科技支撑计划(2009BAC51B01)、江苏高校优势学科建设工程资助项目(PAPD). （气象）
