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投稿时间：2014-10-08 修订日期：2015-06-14
投稿时间：2014-10-08 修订日期：2015-06-14
中文摘要: 利用四川省156站气象资料、全球同化系统(GDAS)资料，引入拉格朗日混合单粒子轨道模型(HYSPLIT4)，定量分析了2013年7月7—11日四川盆地西部暴雨的水汽输送情况。结果表明：此次暴雨过程的水汽主要来自950和850 hPa，并且两者的水汽路径和来源有着显著差别。后向追踪1天，950和850 hPa的水汽来源大值区都出现在四川盆地区；追踪3天，950 hPa的水汽来源大值区仍然在四川盆地附近，但是850 hPa上则追踪到孟加拉湾东部；追踪到9天时，950 hPa的水汽主要来源出现在阿拉伯海到我国南海地区，850 hPa上则追踪到索马里半岛东部。总体上950 hPa的水汽输送路径有五条，其中两条是北方路径，另外三条为南方路径。850 hPa的水汽输送路径有两条，一条是北方路径，另一条是南方路径。定量分析指出，950 hPa的水汽源地主要有四个，其中阿拉伯海—孟加拉湾地区的水汽输送贡献率最大（44.1%），中南半岛—南海地区的水汽贡献率次之（33.1%），巴尔喀什湖地区（15.7%）和贝加尔湖地区（7.1%）的水汽贡献率相对较弱。850 hPa上的水汽源地也有四个，其中从阿拉伯海地区，沿南亚夏季风爆发路径而来的暖湿空气最重要（89.4%），其次从西北部巴尔喀什湖—贝加尔湖地区而来的干冷空气相对较弱（6.3%），而来自孟加拉湾（3%）和局地（1.3%）的水汽则非常少。
中文关键词: 拉格朗日轨迹， 水汽路径， 水汽源地
Abstract:By using the data from 156 meteorological stations in Sichuan Province, the GDAS (Global Data Assimilation System) data and the HYSPLIT4 model, the water vapor transportation of the rainstorm occurring in western Sichuan Basin in 7-11 July 2013 are analyzed quantitatively. The results show that the water vapor mainly comes from the level of 950 hPa and 850 hPa, and the paths and the sources are significantly different. Backtracking one day, the big value zones of water vapor sources at 950 hPa and 850 hPa both are found in the Sichuan Basin area. Backtracking three days, that of water vapor source at 950 hPa is seen still in the vicinity of the Sichuan Basin, but at the level of 850 hPa, the source is tracked to the east of the Bay of Bengal. The main water vapor sources at 950 hPa appear in the Arabian Sea and the South China Sea region, but in the east of Somalia Peninsula at 850 hPa by backtracking nine days. In general, there are five moisture transport paths at the level of 950 hPa, including two in the north and another three in south. There are two paths at the level of 850 hPa in the north and south. Four water vapor sources have been found at 950 hPa. Water vapor coming from the region of Arabian Sea to Bay of Bengal has the maximum contribution rate (44.1%), followed by the Indo China Peninsula to South China Sea region (33.1%). The Balkhash Lake (15.7%) and the Baikal region (7.1%) contribute less relatively. There are four water vapor sources at the level of 850 hPa， of which the water vapor from the Arabian Sea region (89.4%) along the path of Indian summer monsoon is the most important. The contribution rate of the dry and cold air from the Balkhash Lake to Baikal Region is 6.3%, and water vapor contribution rates from the Bay of Bengal (3%) and local area (1.3%) are the least.
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基金项目:中国气象局气象关键技术集成与应用项目(CMAGJ2014M48)和四川省气象局青年基金项目（川气课题 2013 青年 2）共同资助
| 作者 | 单位 |
| 王佳津 | 高原与盆地暴雨旱涝灾害四川省重点实验室，成都 610072 四川省气象台，成都 610072 |
| 王春学 | 四川省气候中心，成都 610072 |
| 陈朝平 | 四川省气象台，成都 610072 |
| 任伟 | 山东空管分局气象台，济南 250100 |
引用文本：
王佳津,王春学,陈朝平,任伟,2015.基于HYSPLIT4的一次四川盆地夏季暴雨水汽路径和源地分析[J].气象,41(11):1315-1327.
WANG Jiajin,WANG Chunxue,CHEN Chaoping,REN Wei,2015.Analysis of a Summer Rainstorm Water Vapor Paths and Sources in Sichuan Basin Based on HYSPLIT4 Model[J].Meteor Mon,41(11):1315-1327.
王佳津,王春学,陈朝平,任伟,2015.基于HYSPLIT4的一次四川盆地夏季暴雨水汽路径和源地分析[J].气象,41(11):1315-1327.
WANG Jiajin,WANG Chunxue,CHEN Chaoping,REN Wei,2015.Analysis of a Summer Rainstorm Water Vapor Paths and Sources in Sichuan Basin Based on HYSPLIT4 Model[J].Meteor Mon,41(11):1315-1327.