| 不同绿洲分布对局地气候影响的数值模拟 |
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| 引用本文： | 高艳红,吕世华.不同绿洲分布对局地气候影响的数值模拟[J].中国沙漠,2001,21(2):108-115. |
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| 作者姓名： | 高艳红 吕世华 |
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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，甘肃兰州 730000 |
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| 基金项目： | “我国重大气候和天气灾害形成机理和预测理论的研究”第一部分;
“我国重大气候灾害的形成机理和预测理论”以及国家自然科学基金项目（49775269）资助 |
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| 摘 要： | 使用非静力平衡中尺度模式MM5V3，通过数值模拟，研究了不同绿洲分布对局地气候的影响，分析了不同绿洲、林带分布状况下的地表能量平衡，以及对边界层特征的影响，为荒漠化治理提供一定的理论依据，研究结果表明：沙漠化后感热增大，潜热减小，地表温度升高，5d内可升高0.7℃，土壤温度也有类似的变化，只是变化幅度小，并存在滞后效应，摩擦速率减小，5d内可减小5cm.s^-1，长期下去将形成风沙肆虍，沙尘暴频繁的气候，为人类调皮响了警钟；而绿化可使潜热增大，对城市影响更为明显，潜热将增大两培，地表温度降低，湿度增大，摩擦速度明显增大，可以有效地阻止沙尘暴的发生，对半干旱地区环境治理大有好处。
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| 关 键 词： | 绿洲 荒漠化 边界层 局地气候 数值模拟 潜热 滞后效应 |
| 文章编号： | 1000-694X(2001)02-0108-08 |
| 修稿时间： | 2000年7月6日 |
Numerical Simulation of
Influence of Different Oasis Distribution on Regional Climate |
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| GAO Yan-hong,LU Shi-hua.Numerical Simulation of
Influence of Different Oasis Distribution on Regional Climate[J].Journal of Desert Research,2001,21(2):108-115. |
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| Authors: | GAO Yan-hong LU Shi-hua |
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| Abstract: | In this paper, the influences of different oasis distributions on the regional climate have been studied by numerical simulation using the non-hydrostatic balance mesoscale model MMSV3, the ground energy balance and the influence on the characteristic of the boundary layer also have been analyzed. It pro-' vides some theory foundation for governing the desertification. Desertification would make the sensitive heat flux increase; the latent heat flux decrease3 the ground temperature rise(0. 7oC in five days), to which the soil temperature is similar; and the friction velocity be smaller. In the long run, it will results in more deteriorating regional climate knocking the alarm bell to the people. While greening could lead to the latent heat flux increasing (more obviously in city); the temperature falling j the humid being higher and the friction speed being bigger. That can prevent the dust storm effectively and has an advantage of managing the environment of the semi-arid region. |
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| Keywords: | oasis desertification the boundary layer |
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