| 区域气候模式对贵州省特重凝冻年温湿特征的模拟分析 |
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| 引用本文： | 白慧,;吴战平,;段莹,;罗宇翔.区域气候模式对贵州省特重凝冻年温湿特征的模拟分析[J].四川气象,2014(4):53-56. |
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| 作者姓名： | 白慧 ;吴战平 ;段莹 ;罗宇翔 |
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| 作者单位： | [1]贵州省气候中心,贵阳550002; [2]贵州省山地气候与资源重点实验室,贵阳550002 |
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| 基金项目： | 贵州省气象局气象科技开放研究基金项目（黔气科合KF[2008]14号）; 贵州省气象局业务发展重大科技专项（黔气科合ZD[2014]02号） |
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| 摘 要： | 本文利用区域气候模式Reg CM4对贵州省2008年初（1月13日~2月14日）的凝冻过程的温湿特征进行了模拟,将模拟结果与NCEP/NCAR再分析资料的对比,发现模式对凝冻过程期间冷空气路径、逆温层和低层流场具有一定的模拟能力,特别是对逆温层垂直结构的模拟较为准确。结果表明,Reg CM模式对贵州区域平均气温的水平和垂直结构分布型都能得到与实况较为一致的模拟结果,水平分布上能刻画出平均气温＂北负南正＂分布,特别是对贵州西北部区域冷空气路径、中心强度、位置和范围都较为准确地模拟出来。垂直结构上能刻画出凝冻过程初期逆温层的形成、维持和消失及后期强冷空气渗透扩散的天气特征,特别是时间结点模拟较为准确。Reg CM模式对贵州区域低空流场的模拟结果与实况较为一致的刻画出了凝冻过程期间来自高纬地区的强冷空气主要从东北路径入侵贵州地区与热带洋面向北输送的暖湿空气在贵州西部汇合这一天气特征,但对贵州西部的南北向温度锋区模拟位置偏东偏北,与实况存在一定的差异,这与西南风模拟值偏大有关。
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| 关 键 词： | RegCM4 凝冻过程 温湿特征 |
Simulation Analysis of the Temperature and Humidity Characteristics in the Heaviest Congeal Process Occurred in Guizhou with RegCM Model |
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| Institution: | BAI Hui , WU Zhanping , DUAN Ying , LUO Yuxiang ( 1. Guizhou Climate Center, Guiyang 550002, China ; 2. Guizhou Institute of Mountainous Environment and Climate, Guiyang 550002, China ) |
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| Abstract: | A regional climate model （RegCM4） is used to simulated the winter congeal process which occurred in the be- ginning of 2008 （13th Jan. to 14th Feb. ） in Guizhou, by comparing reanalysis data with the NCEP/NCAR. The results show that the model has certain performance to simulate the cold air path, the inversion layer and the lower flow field, especially the vertical distribution of the inversion layer. The simulated results of the horizontal distribution and vertical structure of average temperature are consistent with the result of reanalysis data, which are able to effectively describe the horizontal distribution pattern of the temperature, which is negative in north and positive in south. Especially, the simulated results can simulate the path, the central intensity, the location and extent of the cold air in northwest. The vertical structure of average temperature is able to describe the whole processes of inversion layer, including the formation in the early stage, the maintenance in the medi- um stage and the disappearance in the later stage, which the time node simulation is more accurate in particular. The simulated results of the lower flow field over Guizhou fit well with the result of reanalysis data that show the invaded strong cold air from high latitude from northeast, which merges with the warm and moist air from tropical ocean in west Guizhou during the congeal process. The simulation result of the north - south thermal frontal zone has deviation to the north and east from the distribution of reanalysis data, might concerned with the simulation of relatively large southwest low - level wind. |
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| Keywords: | RegCM4 congeal process temperature and humidity characteristics |
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