| 沙漠-绿洲陆-气相互作用和绿洲效应的数值模拟 |
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| 引用本文： | 刘树华,胡予,胡非,梁福明,王建华,刘和平.沙漠-绿洲陆-气相互作用和绿洲效应的数值模拟[J].地球物理学报,2005,48(5):1019-1027. |
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| 作者姓名： | 刘树华 胡予 胡非 梁福明 王建华 刘和平 |
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| 作者单位： | 北京大学物理学院大气科学系暴雨和旱涝灾害教育部重点试验室,北京,100871;中国科学院大气物理研究所大气边界层物理和大气化学国家重点实验室,北京,100029;北京大学物理学院大气科学系暴雨和旱涝灾害教育部重点试验室,北京,100871;中国科学院大气物理研究所大气边界层物理和大气化学国家重点实验室,北京,100029 |
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| 基金项目： | 国家自然科学基金资助项目(40275004)，中国科学院大气物理研究所大气边界层物理和大气化学国家重点实验室和北京大学物理学院大气科学系暴雨和旱涝灾害教育部重点试验室共同资助. |
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| 摘 要： | 本文利用一个已发展的陆面过程参数化方案与大气边界层模式耦合，模拟了半干旱区绿洲戈壁非均匀下垫面的陆面过程及其与大气边界层的相互作用，给出了“绿洲效应”这一自然现象垂直剖面上更为清晰、准确和细致的结构特征.数值模拟的结果与早前的许多观测实验结论相吻合，即“绿洲效应”具有明显的“冷岛效应”和“湿岛效应”；它表现为在绿洲区域比戈壁沙漠区域环境温度低、湿度大、湍流动能输送弱，具有下沉气流而导致与周围戈壁沙漠区域产生水平输送环流.而更加细致地研究这些现象对于深入了解绿洲气候的形成和绿洲的维持机理具有重要的意义.
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| 关 键 词： | 沙漠-绿洲 陆-气相互作用 绿洲效应 数值模拟 |
| 文章编号： | 0001-5733（2005）05-1019-09 |
| 收稿时间： | 2004-06-21 |
| 修稿时间： | 2004-06-212005-05-18 |
Numerical simulation of land-atmosphere interaction and oasis effect over oasis-desert |
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| LIU Shu-Hua,HU Yu,HU Fei,LIANG Fu-Ming,WANG Jian-Hua,LIU He-ping.Numerical simulation of land-atmosphere interaction and oasis effect over oasis-desert[J].Chinese Journal of Geophysics,2005,48(5):1019-1027. |
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| Authors: | LIU Shu-Hua HU Yu HU Fei LIANG Fu-Ming WANG Jian-Hua LIU He-ping |
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| Institution: | 1.Ministry Key Laboratory of Storm and Drought Flood Damage, Department of Atmospheric Sciences,the School of Physics, Peking University, Beijing 100871, China 2 State Key Laboratory of Atmospheric Boundary Layer Physics and Atmospheric Chemistry, Institu |
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| Abstract: | We use a developed parameterized scheme of land surface processes and a transfer model to simulate the physical process of land surface and the interaction between the land surface and the atmosphere boundary layer over an oasis-gobi inhomogeneous area in a semi-arid region. Structure features of vertical section are given more clearly and carefully. The results of numerical simulation are in accord with the previous observations. The results show that the oasis effect has clear cold island effect and wet island effect. It displays that environmental temperature is lower, humidity is higher and the energy of turbulent momentum transfers weakly over oasis than over desert, and there are circulations between oasis and desert. Making more detailed studies on these phenomena is of great significance to understanding of the formation of oasis climate and sustaining mechanisms of oasis. |
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| Keywords: | Desert and oasis Land-Atmosphere Interaction Oasis effect Numerical simulation |
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