| 云凝结核浓度对北京一次降水过程影响的数值模拟 |
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| 引用本文： | 王婧卓,马红云,宋洁,邵海燕.云凝结核浓度对北京一次降水过程影响的数值模拟[J].气象科学,2018,38(1):95-103. |
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| 作者姓名： | 王婧卓 马红云 宋洁 邵海燕 |
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| 作者单位： | 中国气象科学研究院, 北京 100081,南京信息工程大学 气象灾害预报预警与评估协同创新中心, 南京 210044;南京信息工程大学 气象灾害省部共建教育部重点试验室, 南京 210044,南京信息工程大学 气象灾害省部共建教育部重点试验室, 南京 210044;美国 北伊利诺伊大学, 伊利诺伊州 60115,南京信息工程大学 气象灾害省部共建教育部重点试验室, 南京 210044 |
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| 基金项目： | 国家自然科学基金资助项目（41641046；41475087） |
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| 摘 要： | 利用WRF v3.6.1模式,采用Thompson云微物理参数化方案对北京奥运会期间的一次降水过程进行了模拟,通过3组数值试验对比分析了高、中、低云凝结核浓度对降水的影响。数值试验结果显示:(1)在云凝结核浓度较低的情况下,云凝结核浓度增加使24 h累积降水量增加,且增加的幅度相对较低;在云凝结浓度较高的情况下,云凝结核浓度增加使24 h累积降水量减少,且减少的幅度相对较高。(2)从地面雨强分布来看,不同的云凝结核浓度对暴雨、大雨、中雨、小雨的影响均体现在降水强度上,对降水位相的影响不显著。(3)云凝结核浓度的变化对低云量的影响与其对降水的影响相一致,故低云量是影响降水的一个重要因素。
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| 关 键 词： | 气溶胶 云凝结核浓度 降水 数值模拟 |
| 收稿时间： | 2016/11/8 0:00:00 |
| 修稿时间： | 2017/2/23 0:00:00 |
Simulation study on the effects of aerosol concentration upon a precipitation event in Beijing |
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| WANG Jingzhuo,MA Hongyun,SONG Jie and SHAO Haiyan.Simulation study on the effects of aerosol concentration upon a precipitation event in Beijing[J].Scientia Meteorologica Sinica,2018,38(1):95-103. |
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| Authors: | WANG Jingzhuo MA Hongyun SONG Jie and SHAO Haiyan |
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| Institution: | Chinese Academy of Meteorological Sciences, Beijing 100081, China,Collaborative Innovation Center on Forecast and Evaluation of Meteorological Disasters, Nanjing University of Information Science & Technology, Nanjing 210044, China;Key Laboratory of Meteorological Disaster, Ministry of Education, Nanjing University of Information Science & Technology, Nanjing 210044, China,Key Laboratory of Meteorological Disaster, Ministry of Education, Nanjing University of Information Science & Technology, Nanjing 210044, China;Northern Illinois University, Illinois 60115, America and Key Laboratory of Meteorological Disaster, Ministry of Education, Nanjing University of Information Science & Technology, Nanjing 210044, China |
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| Abstract: | A precipitation process occurring during the opening ceremony of Olympic Games in Beijing was simulated by WRF v3.6.1 model coupled with Thompson cloud microphysical scheme, moreover, the effects of high,median and low Cloud Condensation Nucleus(CCN) concentration on rainfall were analyzed by comparing three groups of simulations. It was found that:(1) In the case of low concentration of CCN, the increasing of CCN concentration results in the enhanced amount of 24 h accumulated precipitation with a relative low extent, while in the case of high concentration of CCN, it is to the contrary. (2) From the distribution of rainfall intensity, the effects of CCN concentration variation on hard, heavy, moderate, light rain are both reflected in rainfall intensity,but not in precipitation phase. (3) The effects of CCN concentration on low cloud fraction are the same with the effects of it on rainfall, so the low cloud fraction is a key cause of the precipitation variation. |
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| Keywords: | Aerosol CCN concentration Precipitation Numerical simulation |
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