| 不同类型降雨过程中GPS可降水量的特征分析 |
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| 引用本文： | 郭洁,李国平,黄文诗,陈娇娜,郝丽萍,杨东.不同类型降雨过程中GPS可降水量的特征分析[J].水科学进展,2009,20(6):763-768. |
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| 作者姓名： | 郭洁 李国平 黄文诗 陈娇娜 郝丽萍 杨东 |
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| 作者单位： | 1.中国气象局成都高原气象研究所, 四川, 成都, 610072; |
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| 基金项目： | 科技部国际合作资助项目，成都区域气象中心区域重大科研业务项目，成都市气象局业务技术研究项目，中国气象局成都高原气象研究所高原气象开放实验室基金 |
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| 摘 要： | 利用成都地基GPS观测网2007年8月21日～2008年11月30日观测数据,结合地面自动气象站网资料反演GPS大气可降水量(PWV)。选取夏季暴雨,秋季绵雨和冬季雨雪天气过程分析GPSPWV在不同类型降雨天气过程中的演变特征及日变化规律。结果表明,发生在不同季节的暴雨对应PWV的演变有所不同,盛夏暴雨发生在PWV由峰值向波谷变化过程中,夏末的暴雨则出现在由波谷向波峰转变阶段,降雨前GPSPWV的增减速率可很好地预示其后的暴雨强度。在秋季绵雨中PWV的连续大幅递增或递减可作为降雨开始或结束的预报依据。GPSPWV在降雨天气分析及预报中具有重要的指示意义。
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| 关 键 词： | 降雨 地基GPS 可降水量 特征 |
| 收稿时间： | 2008-08-20 |
Characteristics of GPS-retrieved precipitable water vapor in different precipitation types |
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| GUO Jie,LI Guo-ping,HUANG Wen-shi,CHEN Jiao-na,HAO Li-ping,YANG Dong.Characteristics of GPS-retrieved precipitable water vapor in different precipitation types[J].Advances in Water Science,2009,20(6):763-768. |
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| Authors: | GUO Jie LI Guo-ping HUANG Wen-shi CHEN Jiao-na HAO Li-ping YANG Dong |
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| Institution: | 1.Institute of Plateau Meteorology, China Meteorological Administration, Chengdu 610072, China;2.College of Atmospheric Science, Chengdu University of Information Technology, Chengdu 610225, China;3.Chengdu Regional Meteorological Center, China Meteorological Administration, Chengdu 610072, China;4.Meteorological Bureau of Chengdu, Chengdu 610071, China |
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| Abstract: | The precipitable water vapor (P_(WV)) data are retrieved from the ground-based Global Positioning System (GPS) observational network together with the automatic weather stations in Chengdu region during the period of August 21, 2007 to November 30, 2008. The GPS-retrieved P_(WV) data are analyzed for diurnal cycle characteristics as well as for different precipitation types including the summer heavy rainfall, the autumn continuous rain and the winter snow-rainfall. The result shows that storms occurred in different seasons correspond the distinct P_(WV). For example, the summer storms are associated with the change of P_(WV) values from peaks to troughs. The opposite P_(WV) change characteristic to the summer heavy rainfall is found at the end of summers. The result suggests that the change ratio of P_(WV) values before a rainfall event may well indicate the intensity of subsequent heavy rainfalls. Significant variations in P_(WV) ratios during the autumn continuous rain can potentially predicate the beginning or the ending of a rainfall event. The real-time consecutive GPS-retrieved P_(WV) data can thus be used in operational precipitation forecasting. |
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| Keywords: | precipitation ground-based GPS precipitable water vapor (P_(WV)) characteristic |
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