| 华北和北京的酷暑天气 Ⅱ. 模拟实验和机理分析 |
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| 引用本文： | 孙建华,陈红,赵思雄,曾庆存,谢庄,崔继良,刘海涛.华北和北京的酷暑天气 Ⅱ. 模拟实验和机理分析[J].气候与环境研究,1999,4(4):334-345. |
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| 作者姓名： | 孙建华 陈红 赵思雄 曾庆存 谢庄 崔继良 刘海涛 |
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| 作者单位： | 中国科学院大气物理研究所!北京100029(孙建华，陈红，赵思雄，曾庆存)，北京市气象局!北京100089(谢庄，崔继良，刘海涛) |
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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。
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| 关 键 词： | 酷暑天气 大陆副热带高压 下沉压缩 超绝热梯度 |
A Study on the Severe Hot Weather in Beijing and North China Part II-Simulation and Analysis |
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| Sun Jianhu,Chen Hong,Zhao Sixiong,Zeng Qingcun,Xie Zhuang,Cui Jiliang and Liu Haitao.A Study on the Severe Hot Weather in Beijing and North China Part II-Simulation and Analysis[J].Climatic and Environmental Research,1999,4(4):334-345. |
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| Authors: | Sun Jianhu Chen Hong Zhao Sixiong Zeng Qingcun Xie Zhuang Cui Jiliang and Liu Haitao |
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| Abstract: | 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 |
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| Keywords: | severe hot weather continental subtropical high descending compression superadiabatic gradient |
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