| 环境风场对绿洲冷岛效应影响的数值模拟研究 |
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| 引用本文： | 文莉娟,吕世华,孟宪红,鲍艳. 环境风场对绿洲冷岛效应影响的数值模拟研究[J]. 中国沙漠, 2006, 26(5): 754-758 |
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| 作者姓名： | 文莉娟 吕世华 孟宪红 鲍艳 |
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| 作者单位： | 中国科学院寒区旱区环境与工程研究所,甘肃省干旱气候变化与减灾重点实验室,甘肃,兰州,730000 |
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| 摘 要： | 利用中尺度数值模式MM5对模拟的金塔绿洲效应偏离进行了敏感性试验研究,发现环境场对造成绿洲冷岛、高湿中心的偏离的作用起着非常重要的作用,而同时绿洲的存在对于冷岛、高湿起决定作用。模拟结果显示风场风速越小,冷岛效应越显著;风速越强,偏离中心程度越大,但增大至一定量值后,冷中心将无法激发,即不再呈现出冷岛作用。
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| 关 键 词： | 绿洲效应 背景场 金塔 MM5 |
| 文章编号： | 1000-694X（2006）05-0754-05 |
| 收稿时间： | 2005-03-07 |
| 修稿时间： | 2005-05-11 |
Simulation on the Influence of Background Wind Fields to Oasis "Cool Island" Effect |
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| WEN Li-juan,L Shi-hua,MENG Xian-hong,BAO Yan. Simulation on the Influence of Background Wind Fields to Oasis "Cool Island" Effect[J]. ournal of Desert Research, 2006, 26(5): 754-758 |
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| Authors: | WEN Li-juan L Shi-hua MENG Xian-hong BAO Yan |
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| Affiliation: | Key Laboratory of Arid Climatic Changing and Reducing Disaster of Gansu Province, Cold and Arid Regions Environ mental and Engineering Research Institute, Chinese Academy of Sciences, Lanzhou 730000, China |
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| Abstract: | The model MM5 was used to study the sensitivity of Cool Island" effect of Jinta oasis to background environmental conditions.On August 1~(st) of 2003,the simulated result showed that the center of the Cool Island" was far from the geometric center of the Jinta oasis.In order to know how the phenomenon happened,we designed two kinds of treatments: changing landform and changing wind field respectively in the initial condition of the simulation.We found out that there was not cold-wet field under no-oasis landform,and the center of Cool Island" deviated from the oasis geometric center when there was local wind field.The bigger the wind velocity,the larger the deviation,and the Cool Island" of oasis even couldn't be triggered if the wind velocity became strong enough. |
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| Keywords: | MM5 |
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