| 沙尘气溶胶作为冰核对阿克苏地区一次多单体型强对流风暴降水及其微物理过程影响的数值模拟研究 |
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| 引用本文： | 王雨,银燕,陈倩,王旭,肖辉.沙尘气溶胶作为冰核对阿克苏地区一次多单体型强对流风暴降水及其微物理过程影响的数值模拟研究[J].大气科学,2017,41(1):15-29. |
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| 作者姓名： | 王雨 银燕 陈倩 王旭 肖辉 |
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| 作者单位： | 1.南京信息工程大学中国气象局气溶胶-云-降水重点开放实验室, 南京 210044 |
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| 基金项目： | 公益性行业（气象）专项GYHY201306047，江苏高校优势学科建设工程项目（PAPD） |
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| 摘 要： | 将DeMott冰核浓度参数化方案引入到WRF中尺度数值模式中，模拟了新疆阿克苏地区一次多单体型强对流风暴，并对背景大气条件和沙尘条件下气溶胶作为冰核，对云中微物理结构和降水变化的影响进行了敏感性试验和对比分析，结果显示:在背景大气条件和沙尘条件下增加冰核浓度对降水中心强度影响较小，并且总体上看降水分布变化不大，但是降水局部的变化量较明显；不同背景条件下IN（Ice Nuclei）浓度的增加使得冰晶和雪的质量混合比和数浓度均有较大幅度的增加，其中雪的主要源项为凝华增长过程，而霰增长主要来源于冰相粒子碰并过冷云滴，并且在背景大气和沙尘条件下增加IN都使得霰的数浓度增加，尺度减少。
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| 关 键 词： | 强对流 新疆 WRF模式 冰核 多单体 |
| 收稿时间： | 2015/8/10 0:00:00 |
A Numerical Study of the Effect of Aerosols Acting as Ice Nuclei on the Precipitation and Microphysical Processes in a Multi-size Convective Storm Occurring in Aksu in Xinjiang, Northwest China |
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| WANG Yu,YIN Yan,CHEN Qian,WANG Xu and XIAO Hui.A Numerical Study of the Effect of Aerosols Acting as Ice Nuclei on the Precipitation and Microphysical Processes in a Multi-size Convective Storm Occurring in Aksu in Xinjiang, Northwest China[J].Chinese Journal of Atmospheric Sciences,2017,41(1):15-29. |
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| Authors: | WANG Yu YIN Yan CHEN Qian WANG Xu and XIAO Hui |
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| Institution: | 1.Key Laboratory of Aerosols-Cloud-Precipitation, China Meteorological Administration, Nanjing University of Information Science & Technology, Nanjing 2100442.Xinjiang Uygur Autonomous Region Weather Modification Office, ürümqi 830001 |
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| Abstract: | A multi-size convective storm occurring in Aksu region in Xinjiang, Northwest China was simulated using the Weather Research and Forecasting (WRF) mesoscale model, which includes the parameterization for the concentration of ice nuclei proposed by DeMott et al. (2010). Sensitivity tests have been conducted and results were compared under different background conditions to investigate the response of cloud microphysical processes and precipitation to changes in concentrations of ice nuclei. It is found that the increase in concentrations of ice nuclei under the background aerosol condition and dust condition has little influence on rainfall rate in central area of the rain region, but has a significant influence on the regional distribution of the rainfall. The mass and number concentrations of ice crystal and snow particle increase obviously with the increase in the concentration of ice nuclei under different conditions. The main source of snow growth is the deposition of snow. The main source of graupel growth is the collection of supercooling cloud droplets by ice phase particles. When the concentration of ice nuclei increases in the background aerosol condition and dust condition, the number concentration of graupel increases but the graupel size decreases. |
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| Keywords: | Convective storm Xinjiang WRF model Ice nuclei Multi-size |
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