| 云分析方法对浙江省一次强对流天气数值模拟的应用初探 |
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| 引用本文： | 陈兵,黄绮君,卢长浩,葛旭阳,苏爱芳.云分析方法对浙江省一次强对流天气数值模拟的应用初探[J].气象科学,2020,40(6):782-790. |
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| 作者姓名： | 陈兵 黄绮君 卢长浩 葛旭阳 苏爱芳 |
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| 作者单位： | 江苏省气候中心, 南京 210009;淮河流域气象中心, 安徽 蚌埠 233000;南京信息工程大学, 南京 210044;河南省气象台, 郑州 450003 |
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| 基金项目： | 2018年度淮河流域气象开放研究基金项目；宁波科技局重大项目（2019B10025）；国家重点研发计划项目（2017YFC1502002） |
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| 摘 要： | 基于云分析方法，利用WRF-ARW模式设计一套快速更新循环同化方案，对2019年3月21至22日发生在浙江省的一次强对流天气过程进行模拟研究。通过设计两组对比试验，对云分析同化雷达反射率效果进行诊断分析。在控制试验中，模拟降水落区和降水量与实况差别较大，而采用云分析方法同化雷达反射率（CA-DA）的模拟试验中，降水模拟效果相对较好，雨带明显东移，强度与实况接近。初步结果表明，利用云分析同化雷达反射率因子可以改进模式初始场的风、温度、水汽场以及水凝物等信息，进而缩短模式spin-up时间，提高降水落区及强度的预报。
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| 关 键 词： | 云分析 强对流 数值模拟 |
| 收稿时间： | 2020/7/28 0:00:00 |
| 修稿时间： | 2020/8/7 0:00:00 |
Impacts of cloud analysis method on simulation of a severe rainfall event in Zhejiang |
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| CHEN Bing,HUANG Qijun,LU Changhao,GE Xuyang,SU Aifang.Impacts of cloud analysis method on simulation of a severe rainfall event in Zhejiang[J].Scientia Meteorologica Sinica,2020,40(6):782-790. |
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| Authors: | CHEN Bing HUANG Qijun LU Changhao GE Xuyang SU Aifang |
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| Institution: | Jiangsu Climate Center, Nanjing 210009, China;Huaihe River Meteorological Center, Anhui Bengbu 233000, China;Nanjing University of Information Science & Technology, Nanjing 210044, China; Henan Meteorological Observatory, Zhengzhou 450003, China |
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| Abstract: | Based on cloud analysis data assimilation system, a strong convective event in March 2019 in Zhejiang Province was investigated by using the WRF-ARW model. A pair of numerical experiments were conducted to analyze the impacts of cloud analysis method by using the radar reflectivity data. Results show that the rainfall amount and distribution have large difference between the CTL experiment and the observation. But the CA-DA experiment (with the assimilation of the radar reflectivity by using cloud analysis method) captures the rainfall amount and distribution well. The rain band moves eastward obviously with intensity closer to the observation. Preliminary results show that CA-DA can improve the wind, temperature, water vapor and hydrometeor analyses, which helps alleviate the spin-up problem and thus benefit the numerical forecasting of the weather system. |
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| Keywords: | cloud analysis severe convective event numerical simulation |
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