| 两类双参数云微物理方案对夏季强降水事件模拟能力的对比研究 |
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| 引用本文： | 王文君,朱彬,杨素英,陆其峰,刘宁薇,李岩,王梓航.两类双参数云微物理方案对夏季强降水事件模拟能力的对比研究[J].大气科学学报,2018,41(6):721-730. |
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| 作者姓名： | 王文君 朱彬 杨素英 陆其峰 刘宁薇 李岩 王梓航 |
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| 作者单位： | 南京信息工程大学 中国气象局大气物理与大气环境重点开放实验室, 江苏 南京 210044,南京信息工程大学 中国气象局大气物理与大气环境重点开放实验室, 江苏 南京 210044,南京信息工程大学 中国气象局大气物理与大气环境重点开放实验室, 江苏 南京 210044,国家气象卫星中心, 北京 110081,中国气象局 沈阳大气环境研究所, 辽宁 沈阳 110166,南京信息工程大学 中国气象局大气物理与大气环境重点开放实验室, 江苏 南京 210044,南京信息工程大学 中国气象局大气物理与大气环境重点开放实验室, 江苏 南京 210044 |
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| 基金项目： | 国家自然科学基金资助项目（41575133）；公益性行业（气象）科研专项（GYHY201206002-3）；科技部重点专项（2017YFC1501404）；江苏省高等学校大学生创新创业训练计划项目（201810300013Z；201810300072X） |
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| 摘 要： | 运用中尺度WRF模式,分别采用Morrison(MOR)和Milbrandt-Yau(MY)双参数化云微物理方案,对2010年7月20—21日辽宁省的一次强降水过程进行模拟,通过对比分析两个方案所对应的地表累积降水量、降水强度、云中微物理量的模拟结果,评估两个双参数方案对强降水事件的模拟能力及主要微物理过程的差异。结果表明,在对雨带和强降水中心的位置上,MOR方案的模拟能力优于MY方案,但MY方案对强降水中心强度模拟能力则优于MOR方案;两方案对强降水宏观特征的模拟差异在一定程度上体现了它们在微物理具体方案上的差异,相比MY方案而言,MOR方案模拟降水发展期的垂直水汽通量高,使得雪晶的凝华增长、碰连增长增强,从而导致MOR方案的冰晶含量低,雪晶含量高,通过雪晶的凇附作用形成的霰含量也比MY方案高,霰的凇附增长消耗了大量过冷水,使冷云中云滴(过冷水)含量减少; MOR方案模拟得到的600 hPa到地表的雨滴直径均为1 mm,与实际雨滴直径的观测值不符,需要未来进一步开展研究,对原方案进行优化。
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| 关 键 词： | 双参数云微物理方案 强降水 数值模拟 |
| 收稿时间： | 2017/11/12 0:00:00 |
| 修稿时间： | 2017/12/5 0:00:00 |
Comparison and analysis of strong precipitation simulation capability of Morrison and Milbrandt-Yau two-moment cloud micro-physical schemes |
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| WANG Wenjun,ZHU Bin,YANG Suying,LU Qifeng,LIU Ningwei,LI Yan and WANG Zihang.Comparison and analysis of strong precipitation simulation capability of Morrison and Milbrandt-Yau two-moment cloud micro-physical schemes[J].大气科学学报,2018,41(6):721-730. |
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| Authors: | WANG Wenjun ZHU Bin YANG Suying LU Qifeng LIU Ningwei LI Yan and WANG Zihang |
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| Institution: | Key Open Laboratory of Atmospheric Physics and Atmospheric Environment, China Meteorological Bureau, Nanjing University of Information Science and Technology, Nanjing 210044, China,Key Open Laboratory of Atmospheric Physics and Atmospheric Environment, China Meteorological Bureau, Nanjing University of Information Science and Technology, Nanjing 210044, China,Key Open Laboratory of Atmospheric Physics and Atmospheric Environment, China Meteorological Bureau, Nanjing University of Information Science and Technology, Nanjing 210044, China,China Meteorological Administration, National Satellite Meteorological Centre, Beijing 110081, China,China Meteorological Administration, Shenyang Institute of atmospheric environment, Shenyang 210044, China,Key Open Laboratory of Atmospheric Physics and Atmospheric Environment, China Meteorological Bureau, Nanjing University of Information Science and Technology, Nanjing 210044, China and Key Open Laboratory of Atmospheric Physics and Atmospheric Environment, China Meteorological Bureau, Nanjing University of Information Science and Technology, Nanjing 210044, China |
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| Abstract: | By using the mesoscale numerical model of WRF,this study compared and analysed Morrison and Milbrandt-Yau two-moment microphysical schemes by using them to numerically simulate a heavy rainfall in Liaoning Province on July 20-21,2010.The purpose was to compare their simulation capability and difference in microphysical process by analysing surface cumulative precipitation,rainfall intensity and raindrop cloud microphysical quantity.The results showed that in terms of the simulation capability of rain belt location and the number of strong precipitation centers,Morrison performed better than Milbrandt-Yau scheme.However,in terms of the simulation capability of the center of heavy rainfall intensity,Milbrandt-Yau scheme was superior to Morrison.Their diffiences in macro characteristics of strong precipitation reflected,to some extent,the differences in microphysical characteristics they described.Compared with MY scheme,MOR scheme simulated a higher vertical water vapor flux than that of MY scheme,which enhanced the snow sublimation growth and touch growth.It brought the high content of snow and the low content of ice crystals in MOR scheme,which produced a large amount of graupel through rime attachment of ice ctystals.The attachment process consumed much could water and made the cloud droplets(cold water) decrease.The raindrop diameter remained 1mm from 600 hPa to the surface in Morrison scheme,which was obviously inconsistent with the reality.So it needs further improvement. |
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| Keywords: | two-moment cloud microphysics schemes heavy precipitation numerical simulation |
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