WRF模型中几种行星边界层方案的比较分析

IF 1.6 4区 地球科学 Q3 GEOCHEMISTRY & GEOPHYSICS
Wang Chenggang, S. Ying-jie, Luojie Feng, Cao Le, Yang Jiade, Jiang Hai-mei
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引用次数: 4

摘要

在本研究中,WRF模型中几种最常用的行星边界层(PBL)参数化方案与寿县(2008年8-12月)的观测数据一起使用。目前的工作是美国能源部支持的在中国寿县安装的大气辐射测量(ARM)设施的一部分。在本研究中,我们比较了不同参数化方案在晴天和阴天之间对典型农田下垫面的气象要素和PBL结构的模拟效果。观测结果表明,对于云状态的模拟,ACM2和YSU等非局部方案优于局部方案。此外,ACM2方案在模拟距离表面2m高度的温度和蒸汽方面更好,并且在模拟风向或风速时,MYJ方案比其他方案具有优势。此外,对于潜在温度和蒸汽剖面的模拟,无论在晴天还是阴天,非局部方案(ACM2和YSU)都优于局部方案。结果表明,ACM2方案在弱稳定条件和夜间逆温结构下进行模拟时具有较好的优越性。此外,对于风速剖面的模拟,在不稳定的白天条件下,MYJ和MYNN2.5方案分别在晴天和阴天是最好的。然而,当考虑弱稳定条件时,ACM2方案在晴天的偏差最小,YSU方案在阴天是最佳选择。从总体结果来看,当基于典型农田下垫面的模拟时,ACM2方案在晴天和阴天都是优越的。
本文章由计算机程序翻译,如有差异,请以英文原文为准。
COMPARISON AND ANALYSIS OF SEVERAL PLANETARY BOUNDARY LAYER SCHEMES IN WRF MODEL BETWEEN CLEAR AND OVERCAST DAYS
In the present study, several most commonly used planetary boundary layer (PBL) parameterization schemes in the WRF model are utilized together with the observational data at Shouxian (from August to December, 2008). The present work is a part of Atmospheric Radiation Measurement (ARM) facility supported by the U.S. Department of Energy installed at Shouxian in China. In this study, we compared the simulation effect of meteorological elements and the structure of PBL over typical farmlands underlying surface from different parameterization schemes between clear and overcast days. The observational results revealed that for the simulation of cloud status, non-local schemes such as ACM2 and YSU are superior to the local schemes. Further, the ACM2 scheme is better in simulating temperature and vapor at a height of 2 m from the surface, and the MYJ scheme has an advantage over other schemes when simulating the wind direction or its speed. Also, for the simulation of potential temperature and vapor profile, non-local schemes (ACM2 and YSU) are superior to the local schemes both during clear and overcast days. It is depicted that the ACM2 scheme has better advantages when simulating under weak stable conditions and humidity inversion structure during night time. Moreover, for the simulation of wind speed profile, the MYJ and MYNN2.5 schemes are the best respectively during the clear and overcast days, under unstable day time condition. However, when considering weak stable condition, ACM2 scheme has a minimum deviation on clear days and YSU scheme is the best choice on overcast days. From the overall results, ACM2 scheme is superior both on clear and overcast days, when simulation is based on typical farmland underlying surface.
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来源期刊
地球物理学报
地球物理学报 地学-地球化学与地球物理
CiteScore
3.40
自引率
28.60%
发文量
9449
审稿时长
7.5 months
期刊介绍:
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