| 云并合过程中物理特征演变的模拟研究 |
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| 引用本文： | 吕玉环,李艳伟,金莲姬,何彩芬.云并合过程中物理特征演变的模拟研究[J].大气科学,2012,36(3):471-486. |
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| 作者姓名： | 吕玉环 李艳伟 金莲姬 何彩芬 |
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| 作者单位： | 1.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 |
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| 基金项目： | 国家自然科学基金资助项目40975086、41075029, 中国科学院知识创新工程重要方向项目KZCX2-EW-203, 江苏省青蓝工程云雾降水与气溶胶研究创新团队, 江苏高校优势学科建设工程 |
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| 摘 要： | 云并合过程中物理特征的变化对云降水过程的演变至关重要,对降水的短时预报和研究也有重要意义.因此,本文利用新一代中尺度天气预报模式WRF (Weather Research Forecast)对2005年5月5日发生在贵阳的一次云并合过程进行模拟,结合雷达观测资料以及MICAPS资料,分析了降水对流云的合并过程,及其伴随...
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| 关 键 词： | 对流 并合 数值模拟 物理特征 |
| 收稿时间： | 2010/12/22 0:00:00 |
| 修稿时间： | 2011/11/26 0:00:00 |
Simulation of Physical Characteristics Evolution in Cloud Merger |
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| LV Yuhuan,LI Yanwei,JIN Lianji and HE Caifen.Simulation of Physical Characteristics Evolution in Cloud Merger[J].Chinese Journal of Atmospheric Sciences,2012,36(3):471-486. |
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| Authors: | LV Yuhuan LI Yanwei JIN Lianji and HE Caifen |
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| Institution: | 1.Key Laboratory of Meteorological Disaster, Ministry of Education, Nanjing University of Information Science&Technology, Nanjing 2100442.Ningbo Meteorological Bureau, Ningbo 315012 |
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| Abstract: | Physical characteristics evolution in cloud merger is critical to the evolution of cloud precipitation, which is also important for short-term forecasting and study of precipitation. So, in this paper, using WMF (Weather Research and Forecasting) model, the authors simulated a merging process in Guiyang on 5 May 2005, combined radar observations and MICAPS (Meteorological Information Comprehensive Analysis and Processing System) data, and analyzed the processes of precipitation convection merger and the evolution of associated physical characteristics. The cumulus merger processes are of diversification, experience the process from neighbouring isolated cells merging to cell-cloud cluster merging, and neighbouring cloud clusters merging into widespread precipitation system. In the merging processes of several stages, the change of temperature stratification structure curve all shows that unstable energy releases during the merging, and unstable stratification before merging tends to more stable stratification after merging, especially at middle levels, tends to neutral one, which is advantageous for the dominant development scale becoming longer. The physical characteristics alter significantly, which shows that before and after the first merging and complete merging, the maximum precipitation at the convective center all increases strongly. However, the changing of the maximum upward flow velocity is contrary to the changing of the maximum precipitation. The maximum upward flow velocity generally decreases after the merging. While, the average upward flow velocity all decreases before and after the first merging and complete merging. The average precipitation in the whole cloud region mostly tends to increase. |
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| Keywords: | convection merger numerical simulation physical characteristics |
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