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中尺度模式不同分辨率下大气多尺度特征模拟能力分析
引用本文:张宇,郭振海,张文煜,等.中尺度模式不同分辨率下大气多尺度特征模拟能力分析[J].大气科学,2010,34(3):653-660.
作者姓名:张宇  郭振海  张文煜  
作者单位:中国科学院大气物理研究所大气科学和地球流体力学数值模拟国家重点实验室,北京,100029;兰州大学大气科学学院,半干旱气候变化教育部重点实验室,兰州,730000;中国科学院大气物理研究所大气科学和地球流体力学数值模拟国家重点实验室,北京,100029;兰州大学大气科学学院,半干旱气候变化教育部重点实验室,兰州,730000;天津市气象科学研究所,天津,300074
基金项目:国家重点基础研究发展计划项目2009CB421402
摘    要:本文利用不同水平分辨率下的中尺度大气数值模式ARPS (Advanced Regional Prediction System) 模拟我国内蒙古奈曼旗农牧交错带2001年7月23日18时至27日18时天气演变过程, 以研究中尺度模式水平分辨率提高对多种时空尺度天气过程, 尤其是更小时空尺度过程的模拟改进。为此, 本文提取不同分辨率下u、v、w、θ、p气象要素的模拟结果进行分析。秩和检验和方差分析表明, 模式分辨率提高对气象五要素的模拟具有一定的影响, 但对不同要素的影响程度有所不同, 其中, 对p、θ、w影响最大, 对u、v的影响次之, 对流层下部和边界层对分辨率最为敏感, 对流层中上部次之。谱分析和小波分析都表明分辨率的提高有利于再现大气运动的多尺度特征, 但在不同大气分层和不同模式变量中又有所不同。总的来说, 高层效果好于低层, 具有强周期变化规律的变量效果好于周期性弱的变量。

关 键 词:ARPS  分辨率提高  统计分析  谱分析  小波分析

Analysis of Mesoscale Numerical Model's Ability in Atmospheric Multi-Scale Characteristics Simulation for Different Resolutions
ZHANG Yu,GUO Zhenhai,ZHANG Wenyu and et al.Analysis of Mesoscale Numerical Model''s Ability in Atmospheric Multi-Scale Characteristics Simulation for Different Resolutions[J].Chinese Journal of Atmospheric Sciences,2010,34(3):653-660.
Authors:ZHANG Yu  GUO Zhenhai  ZHANG Wenyu and
Affiliation:State Key Laboratory of Numerical Modeling for Atmospheric Sciences and Geophysical Fluid Dynamics, Institute of Atmospheric Physics, Chinese Academy of Sciences, Beijing, 100029; Key Laboratory for Semi-Arid Climate Change of the Ministry of Education, C;State Key Laboratory of Numerical Modeling for Atmospheric Sciences and Geophysical Fluid Dynamics, Institute of Atmospheric Physics, Chinese Academy of Sciences, Beijing, 100029;Key Laboratory for Semi-Arid Climate Change of the Ministry of Education, College of Atmospheric Sciences, Lanzhou University, Lanzhou, 730000
Abstract:This article simulated a weather developing process in the agro-pastoral transitional zone of Inner Mongolia from 1800 UTC 23 July to 1800 UTC 27 July, 2001 with mesoscale atmospheric numerical model ARPS (Advanced Regional Prediction System). To understand the change of mesoscale numerical models ability in atmospheric multi-scale movement simulation, especially for smaller space-time scale motion at different model resolutions, the authors analyzed simulation results of u, v, w, θ, p for different model resolutions. The rank sum test and Analysis of variance (ANOVA) show that the model resolution improvement can affect the five variables simulation to different extents. The impact on p, θ and w is the greatest, the impact on u and v takes second place. The lower troposphere and the boundary layer are the most sensitive to the resolution, followed by the upper troposphere. The spectrum analysis and wavelet analysis show that enhancing resolution can improve the model's ability in the atmospheric multi-scale characteristics simulation and the improvement is different for different atmospheric layers and meteorological elements. In general, the simulation effect in upper layers is better than in lower layers, and the simulation effect of variables with strong cycle signals is better than that with weak cycle signals.
Keywords:ARPS  resolution improvement  statistical analysis  spectrum analysis  wavelet analysis
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