中国沙漠 ›› 2001, Vol. 21 ›› Issue (2): 108-115.

• 研究论文 • 上一篇    下一篇


高艳红, 吕世华   

  1. 中国科学院寒区旱区环境与工程研究所, 甘肃兰州 730000
  • 收稿日期:2000-07-06 修回日期:2000-10-12 出版日期:2001-06-20 发布日期:2001-06-20
  • 作者简介:高艳红(1973-),女(汉族),山西太谷县人,在读博士,主要从事中尺度数值模拟方面的研究
  • 基金资助:

Numerical Simulation of Influence of Different Oasis Distribution on Regional Climate

GAO Yan-hong, LU Shi-hua   

  1. Cold and Arid Regions Environmental and Engineering Research institute, Chinese Academy of Sciences, Lanzhou 730000, China
  • Received:2000-07-06 Revised:2000-10-12 Online:2001-06-20 Published:2001-06-20

摘要: 使用非静力平衡中尺度模式MMSV3,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,摩擦速度减小,5d内可减小5cm·s-1,长期下去,将形成风沙肆虐,沙尘暴频繁的气候,为人类敲响了警钟;而绿化可使潜热增大,对城市影响更为明显,潜热将增大两倍,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。

关键词: 绿洲, 荒漠化, 边界层

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 provides some theory foundation for governing the desertification. Desertification would make the sensitive heat flux increase; the latent heat flux decrease; the ground temperature rise(0.7℃ 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; 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.

Key words: oasis, desertification, the boundary layer