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华北和北京的酷暑天气 II.模拟试验和机理分析 预览 被引量:33

A Study on the Severe Hot Weather in Beijing and North China Part II-Simulation and Analysis
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摘要 利用Penn/NCAR 的MM5 中尺度模式对1999 年6 、7 月华北的两段高温过程进行了模拟研究, 并利用模拟输出量对高温形成的机理进行了一些探讨。结果表明, 在利用了Nudging 同化以后, 中尺度模式能对整个过程作较长时间的模拟, 对高压的移动过程、强度和维持能较好的复制出来。分析结果表明, 大陆副热带高压中的下沉增温和辐射增温是造成此高温酷暑天气的主要原因。 In Part I of this study, the circulation and weather systems of two severe hot weather cases that occurred in June and July 1999 have been analyzed In this paper (Part II), mesoscale model (MM5) developed by Penn/NCAR was used to simulate the two cases Simulation results were used to analyze the physical mechanism of the severe hot weather The results showed that the model can simulate the land subtropical-over high of two cases and its moving, intensity and coverage for a long time successfully if nudging assimilation was used The main reasons of forming severe hot weather were the downdraft of land subtropical-over high and solar radiation
作者 孙建华 陈红 赵思雄 曾庆存 谢庄 崔继良 刘海涛 Sun Jianhua, Chen Hong, Zhao Sixiong and Zeng Qingcun (Institute of Atmospheric Physics, Chinese Academy of Sciences, Beijing 100029) Xie Zhuang, Cui Jiliang and Liu Haitao (Beijing Meteorological Bureau, Beijing 100089)
出处 《气候与环境研究》 CSCD 1999年第4期334-345,共12页 Climatic and Environmental Research
关键词 酷暑天气 大陆副热带高压 下沉压缩 超绝热梯度 severe hot weather continental subtropical high descending compression superadiabatic gradient
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