GPS折射率资料在梅雨锋暴雨数值模拟中的应用

赵德显; 郁红弟; 沈桐立

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DOI:10.7519/j.issn.1000-0526.2011.12.006

气象:2011,37(12):1511-1518

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GPS折射率资料在梅雨锋暴雨数值模拟中的应用

赵德显^1,2, 郁红弟³, 沈桐立²

(1.民航云南空管分局，昆明 650200;2.南京信息工程大学气象灾害省部共建教育部重点实验室，南京 210044;3.中国人民解放军61741部队,北京 100094)

The Application of GPS Refractive Index Data to Numerical Simulation of Meiyu Front

Zhao Dexian^1,2, Yu Hongdi³, Shen Tongli²

(1.Yunnan Air Traffic Management SubBureau, CAAC, Kunming 650200;2.Key Laboratory of Meteorological Disaster of Ministvy of Education, Nanjing University of Information Science and Technology, Nanjing 210044;3.61741 Troops of PLA, Beijing 100094)

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本文已被：浏览 1121次下载 1495次
投稿时间：2010-11-16 修订日期：2011-05-13

中文摘要: 运用WRF三维变分同化系统同化GPS掩星折射率资料，并应用到2007年7月4—6日梅雨锋暴雨个例中进行数值模拟试验，以此考察GPS掩星折射率资料在梅雨锋暴雨数值模拟中的应用。同化结果表明:GPS掩星折射率资料对初始资料的调整主要是中低层湿度场,对于温度场和高度场的调整都是从底层到高层逐渐增大；加入GPS掩星折射率资料对降水预报有所改进，这与中低层湿度场的初始调整有关系；从对模拟结果进行诊断和结构分析中可以发现负散度增量和正涡度增量与降水中心和区域有很好的对应，同化资料之后对于各降水中心地区增强了产生降水的动力条件。

中文关键词: GPS掩星折射率资料，三维变分同化，梅雨锋暴雨，散度，涡度

Abstract:In this paper, GPS occultation refractive index data are assimilated by three dimensional variation assimilation system of WRF model which is used to explore the improvement of its initial value through the numerical simulation of 4-6 July 2007 Meiyu. GPS occultation data adjustments to the initial data are mainly at low level moisture field; For the temperature and height fields, adjustments are gradually increasing from bottom to top. The horizontal and vertical incremental analysis is able to explore the effects of assimilation on improving the forecast， as well as learn more about the spatial structure of the system as a way to explore the dynamic mechanism of its occurrence and development. Assimilated results show that adding GPS occultation data to precipitation forecasting is the most obvious because of the initial low level moisture field adjustment. The negative divergence and positive vorticity increments are well corresponding to precipitation zones. And it enhances the dynamic conditions of precipitation.

keywords: GPS occultation refractive index data, three dimensional variation assimilation, heavy rain of Meiyu front, divergence, vorticity

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基金项目:国家自然科学基金 40975037和40775033共同资助

作者	单位
赵德显	民航云南空管分局，昆明 650200 南京信息工程大学气象灾害省部共建教育部重点实验室，南京 210044
郁红弟	中国人民解放军61741部队,北京 100094
沈桐立	南京信息工程大学气象灾害省部共建教育部重点实验室，南京 210044

Author Name	Affiliation
Zhao Dexian	Yunnan Air Traffic Management Sub Bureau, CAAC, Kunming 650200 Key Laboratory of Meteorological Disaster of Ministvy of Education, Nanjing University of Information Science and Technology, Nanjing 210044
Yu Hongdi	61741 Troops of PLA, Beijing 100094
Shen Tongli	Key Laboratory of Meteorological Disaster of Ministvy of Education, Nanjing University of Information Science and Technology, Nanjing 210044

引用文本：
赵德显,郁红弟,沈桐立,2011.GPS折射率资料在梅雨锋暴雨数值模拟中的应用[J].气象,37(12):1511-1518.
Zhao Dexian,Yu Hongdi,Shen Tongli,2011.The Application of GPS Refractive Index Data to Numerical Simulation of Meiyu Front[J].Meteor Mon,37(12):1511-1518.