| 2005年7月4—11日淮河流域强降水过程的水汽收支分析 |
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| 引用本文： | 陈晓红,余金龙,邱学兴,张娇.2005年7月4—11日淮河流域强降水过程的水汽收支分析[J].气象,2007,33(4):47-52. |
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| 作者姓名： | 陈晓红 余金龙 邱学兴 张娇 |
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| 作者单位： | 安徽省气象台,合肥,230031 |
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| 基金项目： | 中国气象局科技攻关项目;安徽省气象局科研项目 |
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| 摘 要： | 通过对水汽通量向量的势函数和流函数分解以及水汽方程的诊断计算，分析了2005年7月4-11日淮河流域强降水过程水汽收支情况。结果表明，此次强降水过程主要水汽来源于菲律宾经南海向北转向流入我国中东部地区的较强盛的水汽输送带。这条水汽输送带由两部分组成：起重要作用的是强中心位于太平洋上，沿热带赤道以南地区一致向西到达菲律宾的水汽流，另一部分是沿赤道南侧的东风气流，在非洲东岸索马里附近越赤道向东北方向经孟加拉湾北部到达菲律宾的水汽流；水汽汇合区内，淮河流域附近存在东南与西北水汽汇集辐合，这可能是造成淮河流域持续出现强降水重要原因之一；水汽强辐合区域与强降水发生的区域相对应，降水发生区域的总体水汽收支和平均面降雨量的变化趋势相吻合，随着水汽收入的增加，降水量开始加大；中低层的水汽垂直输送与降水过程的平均面降雨量的变化具有较好的对应关系。
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| 关 键 词： | 强降水过程 势函数 流函数 水汽收支 |
| 收稿时间： | 2006/6/27 0:00:00 |
| 修稿时间： | 2006-06-272006-12-14 |
Vapor Investigation of a Heavy Rainfall Event in the Huaihe River Basin in 2005 |
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| Chen Xiaohong,Yu Jinlong,Qiu Xuexing and Zhang Jiao.Vapor Investigation of a Heavy Rainfall Event in the Huaihe River Basin in 2005[J].Meteorological Monthly,2007,33(4):47-52. |
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| Authors: | Chen Xiaohong Yu Jinlong Qiu Xuexing and Zhang Jiao |
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| Institution: | Anhui Observatory, Hefei 230031 |
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| Abstract: | The stream function and potential function of water vapor transport vector during a heavy rainfall in the Huaihe River valley in the summer of 2005 is studied and the averaged water vapor budget is computed and diagnosed during the event period.The results indicate that the main water vapor source of the event is the strong vapour transportation band coming from Philippines and across South China Sea and arriving to the middle-east China.This strong vapor transportation was composed of two branches.The first one was from Pacific vapor transport center and it moved westward along the south region of equator.The other one was coming from the easterly trade wind in the southern hemisphere which got across the equator at Africa's Somalia peninsula and then arrived to the north of Bangal Gulf,and finally reaching to Philippines.The area of severe vapor transport vector converge corresponds with the area of the heavy rainfall.The total water vapor budget corresponds with the average rainfall,the average rainfall increases with the increasing total water vapor converge.On the other hand,the water vapor vertical transport at low level corresponds well with the average area-rainfall. |
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| Keywords: | heavy rainfall stream function potential water vapor budget |
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