WRF模式不同微物理方案对青海高原夏季一次降水过程模拟差异的初步探讨  

A preliminary study on the simulation differences of a summer precipitation process by different microphysics schemes of WRF model in Qinghai Plateau

作　　者：王丽霞[1] 刘娜[1] 王启花 马有绚 张博越 WANG Lixia;LIU Na;WANG Qihua;MA Youxuan;ZHANG Boyue(Weather Modification Office of Qinghai Province,Xining 810001,China;Qinghai Climate Center,Xining 810001,China)

机构地区：[1]青海省人工影响天气办公室,西宁810001 [2]青海省气候中心,西宁810001

出　　处：《气象科学》2024年第4期766-774,共9页Journal of the Meteorological Sciences

基　　金：国家自然科学基金资助项目(42165008);青海省气象局重点资助项目(QXZD2022-11);青海省科技厅研究项目(2021-ZJ-745)。

摘　　要：为了解不同微物理方案对青海高原地区夏季降水过程模拟的影响,利用WRF模式和NCEP再分析资料,选取Lin方案、WSM6方案和New Thompson方案等3种微物理过程参数化方案,模拟了青海高原地区2017年夏季一次典型降水过程,并结合探空、降水等观测资料对模拟结果进行了探讨。结果表明:WRF模式3种微物理参数化方案对温度廓线的模拟表现出较好的一致性,且均与实况接近,但对不同区域相对湿度廓线的模拟能力有明显差异;3种微物理参数化方案均能模拟出本次降水的主要走向、雨带及强降水中心,但模拟的雨带和强降水中心位置较实况偏东且局部雨量偏大;WSM6方案对降水空间分布的模拟与实况最接近,WSM6和New Thompson方案模拟的降水偏差均略小于Lin方案;3种方案降水模拟结果中,小雨TS评分最高,其次是中雨,对大雨模拟的可信度均较差;降水模拟小雨TS评分最高的是New Thompson方案,为0.60,WSM6方案次之,Lin方案较差,为0.43;对中量降水模拟,WSM6方案略优于其他两个方案;降水模拟New Thompson和WSM6方案整体优于Lin方案。In order to understand the influence of different microphysical schemes on summer precipitation process simulation in Qinghai Plateau,by using the WRF model and NCEP reanalysis data,three microphysical process parameterization schemes,including Lin scheme,WSM6 scheme and New Thompson scheme,were selected to simulate a typical precipitation process in the summer of 2017 in Qinghai Plateau,and the simulation results were discussed based on the observation data of radiosonde and precipitation.Results show that:three microphysical parameterization schemes of WRF model show good consistency to the simulation of temperature profiles,and are close to the real situation.However,there are obviously different in the simulation ability of relative humidity profiles in different regions;the three microphysical parameterization schemes can simulate the main trend,rain belt and heavy rainfall center of the precipitation,but the location of simulated rain belt and heavy precipitation center is more east than the real situation and the local rainfall is larger;the simulated precipitation spatial distribution of WSM6 scheme is the closest to the real data,and the simulated precipitation deviation of the WSM6 and New Thompson schemes is slightly smaller than that of the Lin scheme;the TS score of light rain was the highest,followed by moderate rain,and the reliability of heavy rain simulation was poor;the New Thompson scheme has the highest TS score(0.60)in light rain simulation,followed by WSM6 scheme and Lin scheme(0.43);the WSM6 scheme is better than the other two schemes for medium precipitation simulation;New Thompson scheme and WSM6 scheme are superior to Lin scheme on the whole.

关 键 词：WRF模式 微物理参数化方案 青海高原 降水模拟 

分 类 号：P435[天文地球—大气科学及气象学]