| WRF模式中3种闪电参数化方案的对比分析 |
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| 引用本文： | 史东东,杨仲江,向春燕,杨虎,许永彬.WRF模式中3种闪电参数化方案的对比分析[J].热带地理,2016,36(4):673-681. |
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| 作者姓名： | 史东东 杨仲江 向春燕 杨虎 许永彬 |
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| 作者单位： | （1．南京信息工程大学 a．中国气象局气溶胶与云降水重点开放实验室；b．大气物理学院，南京 210044；2．西藏自治区防雷中心，拉萨850000） |
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| 基金项目： | 国家自然科学基金项目(41175003);江苏高校优势学科建设工程资助项目(PAPD) |
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| 摘 要： | 利用WRF 模式V3.6.1 中3 种基于经验公式的闪电参数化方案对2013-07-05 江苏省内的1 次飑线过程进行数值模拟，对比3 种方案在模拟闪电位置和频数的特点，分析模拟结果的成因。结果表明：PR92w 方案能够很好地模拟闪电的分布位置；PR92z 方案的模拟结果和PR92w 方案正好相反，闪电频数与实测结果有很好的一致性但分布位置出现偏移；LPI 方案虽然能指示闪电分布区域，但对高闪电密度区的预报有一定误差。3 种方案的模拟结果表明：垂直风速和雷达回波是影响模式预报闪电频数和分布的重要因素。因此，增大网格模拟精度和同化雷达资料是改善PR92 方案模拟效果的重要途径。
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| 关 键 词： | WRF 模式 闪电参数化 垂直风速 雷达回波 |
| 收稿时间： | 2015-05-22 |
Comparative Analysis of Three Lightning Parameterization Schemes in WRF Model |
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| SHI Dongdong;YANG Zhongjiang;XIANG Chunyan;YANG Hu;XU Yongbin.Comparative Analysis of Three Lightning Parameterization Schemes in WRF Model[J].Tropical Geography,2016,36(4):673-681. |
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| Authors: | SHI Dongdong;YANG Zhongjiang;XIANG Chunyan;YANG Hu;XU Yongbin |
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| Institution: | （1．a．Key Laboratory for Aerosol-Cloud-Precipitation of China Meteorological Administration；b．School of Atmospheric Physics，Nanjing University of Information Science & Technology，Nanjing 210044，China；2．Tibet Lightning Protection Center，Lhasa 850000，China） |
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| Abstract: | A squall line that occurred in Jiangsu Province on July 5, 2013, was successfully simulated with the WRF model by using three kinds of lightning parameterization schemes, which were based on empirical formulae.Comparative analysis of different schemes in simulating the distribution and frequency of lightning has beendone. Furthermore, we have discussed the reasons of simulation errors, which lay good foundation for lightningmonitoring and prediction. The results show that PR92w scheme exhibiting the location of lightning is in goodagreement with the observations, but the flash count has certain difference with the actual situation.Coincidentally, the results of PR92z scheme is opposite with that of PR92w scheme. Although forecast in highflash density using LPI is not so correct, it can indicate the distribution of lightning to some extent. Error analysishas revealed that vertical velocity and radar echo are the main factors of influencing the forecast in flash.According to the above results, increasing the grid precision and assimilating radar data is the main approach forimproving the simulation results of PR92 schemes. |
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| Keywords: | WRF model lightning parameterization vertical wind radar echo |
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