| 祁连山夏季地形云结构和云微物理过程的模拟研究(I):模式云物理方案和地形云结构 |
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| 引用本文： | 刘卫国,刘奇俊.祁连山夏季地形云结构和云微物理过程的模拟研究(I):模式云物理方案和地形云结构[J].高原气象,2007(1). |
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| 作者姓名： | 刘卫国 刘奇俊 |
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| 作者单位： | 中国气象局中国气象科学研究院中国气象局云雾物理重点开放实验室 北京100081(刘卫国)，中国气象局国家气象中心 北京100081(刘奇俊) |
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| 基金项目： | “十五”国家科技攻关项目“人工增雨技术研究及示范(2001BA610A-06)”，社会公益研究专项(2004DIB3J116)共同资助 |
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| 摘 要： | 对三维非静力中尺度模式ARPS的云降水微物理方案进行了改进,利用改进后的ARPS模式模拟了祁连山地区夏季的两个地形云个例,通过对各自模拟结果的对比分析并结合实况资料研究了夏季祁连山地区地形云的发展状况、动力场特征、降水特征以及云微物理结构特征。研究结果表明,地形云的发展受地形影响很大,地形的抬升促进了云和降水的发展,地形的作用也改变了地面降水特征,使云的宏、微观物理结构发生较大变化。
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| 关 键 词： | ARPS 云微物理 祁连山 地形云 |
The Numerical Simulation of Orographic Cloud Structure and Cloud Microphysical Processes in Qilian Mountains in Summer. Part(I):Cloud Microphysical Scheme and Orographic Cloud Stucture |
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| LIU Wei-guo,LIU Qi-jun.The Numerical Simulation of Orographic Cloud Structure and Cloud Microphysical Processes in Qilian Mountains in Summer. Part(I):Cloud Microphysical Scheme and Orographic Cloud Stucture[J].Plateau Meteorology,2007(1). |
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| Authors: | LIU Wei-guo LIU Qi-jun |
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| Institution: | LIU Wei-guo1,LIU Qi-jun2 |
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| Abstract: | The ARPS mesoscale model is improved by modified its cloud microphysical scheme.Three new predictands and their microphysical processes, including the number concentration of cloud ice(Ni) and artificial ice crystal(Nia) and the mixing ratio of artificial ice crystal(Qia),are introduced into the model.Deposition and condensation-freezing nucleation(pidcf),contact-freezing nucleation(pictc),ice multiplication(pimult) and accretion of cloud ice by cloud water(piacw) are added to the cloud microphysical scheme.The equations of autoconversion of cloud water to form rain(praut),condensation and evaporation of cloud water(svc),deposition of cloud ice(dep) and sublimation of cloud ice(sub) are improved.In addition,three kinds of cold cloud seeding scheme are developed in model,and the seeding materials include ideal artificial ice crystal and AgI catalyst.Two cases of Qilian mountains area orographic cloud in summer are simulated by the improved ARPS model.The characteristics of cloud development,cloud dynamic, precipitation and cloud microphysical structure are investigated.Those cases study suggest that orographic cloud is greatly influenced by topography.Forced lifting of topography prolong cloud life,widen cloud field and promote the development of cloud convection.Because of orographic influence,precipitation area is expanded,and precipitation duration is prolonged,and precipitation intensity and grossed are also changed.Furthermore,the orographic influence also result in the variation of cloud microphysical characteristic,such as the grosses,distribution and life time of water substance in cloud. |
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| Keywords: | ARPS model Cloud microphysics Qilian mountains Orographic cloud |
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