东南极地区WRF模式3种边界层参数化方案的评估  

Evaluation of three boundary layer parameterization schemes for WRF in the East Antarctic region

作　　者：胡杰 杨堤益 邹小伟 丁明虎[1] HU Jie;YANG Diyi;ZOU Xiaowei;DING Minghu(Institute of Global Change and Polar Meteorology,Chinese Academy of Meteorological Sciences,Beijing 100081,China;Haining Meteorological Bureau,Haining 314400,China;GNSS Research Center,Wuhan University,Wuhan 430079,China)

机构地区：[1]中国气象科学研究院全球变化与极地研究所,北京100081 [2]浙江省海宁市气象局,浙江海宁314400 [3]武汉大学卫星导航定位技术研究中心,湖北武汉430079

出　　处：《极地研究》2025年第1期11-25,共15页Chinese Journal of Polar Research

基　　金：国家自然科学基金(42122047,42201151);中国气象科学研究院基本科研业务项目(2021Z006)资助。

摘　　要：由于极地自然环境恶劣,大气观测受到较大的限制,因此,极地数值天气预报模式(Polar WRF)是在该地区开展大气科学研究的重要手段之一。本文利用Polar WRF 4.1.1模式对2020年3月—2021年3月东南极近地面气象要素进行模拟,对模式中3种边界层参数化方案进行适用性评估,并利用4个从东南极海岸至冰盖穹顶分布的自动气象站逐小时地面常规气象观测资料进行分析验证。结果表明,在沿海站点,ACM2方案考虑了热量和湍流通量的多层结构,对相对湿度、风速和气压的模拟效果最好(偏差分别为–12.53%,–1.38 m·s^(–1)和0.37 hPa),整体表现出最好的模拟效果;在内陆站点,ACM2和YSU方案较强的非局地作用使得热力强迫引导的湍流混合增加,模拟效果更好;在穹顶站点,下垫面类型较为单一,局地方案(MYJ)对气温和风速的模拟效果最好(偏差分别为3.32℃和3.76 m·s^(–1))。本研究结果对未来极区边界层参数化方案改进与更系统地开展极区边界层数值模拟有重要参考价值。Polar Weather Research and Forecasting model(Polar WRF)is one of the important means to carry out atmospheric research in polar regions due to the limitation of atmospheric observation and the harsh natural environment there.In this paper,Polar WRF 4.1.1 model was used to simulate near-surface meteorological elements over the East Antarctic Ice Sheet from March 2020 to March 2021,and the applicability of three boundary layer parameterization schemes in the model was evaluated.The hourly routine surface meteorological observation data of four automatic weather stations(AWS)located from coast to dome in the East Antarctic Ice Sheet was analyzed and verified.The results show that the ACM2 scheme has the best simulation effect on relative humidity,wind speed and air pressure(The deviations are–12.53%,–1.38 m·s^(–1) and 0.37 hPa,respectively),and the overall simulation effect is the best at the coastal sites,considering the multi-layer structure of heat and turbulent flux.At inland stations,the strong non-local action of ACM2 and YSU schemes increases the turbulent mixing guided by thermal forcing,and the simulation results are better.At Dome A site,the underlying surface type is relatively simple,and the local scheme(MYJ)has the best simulation effect on temperature and wind speed(The deviations are 3.32 and 3.76 m℃·s^(–1),respectively).The results of this study have important reference value for the improvement of the polar boundary layer parameterization scheme and the systematic development of the polar boundary layer numerical simulation in the future.

关 键 词：PolarWRF 东南极 数值模拟 边界层方案 

分 类 号：P435[天文地球—大气科学及气象学]