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中国沙漠 ›› 2005, Vol. 25 ›› Issue (5): 623-628.

• 研究论文 •    下一篇

金塔绿洲风场与温湿场特征的数值模拟

吕世华, 尚伦宇   

  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:2005-01-17 修回日期:2005-03-20 出版日期:2005-10-20 发布日期:2005-10-20
  • 作者简介:吕世华(1957-),男(汉族),甘肃省漳县人,研究员,博士生导师,主要从事数值模式发展、气候模拟研究.E-mail:slu@ns.lzb.ac.cn
  • 基金资助:
    国家重点基金项目(40233035);中国科学院方向性创新项目(KZCX3-SW-329);中国科学院寒区旱区环境与工程研究所创新项目(CX210036)共同资助

Numerical Simulation of Characteristics of Wind Field, Air Temperature and Humidity in Jinta Oasis, Hexi Corridor

LÜ Shi-hua, SHANG Lun-yu   

  1. Cold and Arid Regions Environmental and Engineering Research Institute, Chinese Academy of Sciences, Lanzhou 730000, China
  • Received:2005-01-17 Revised:2005-03-20 Online:2005-10-20 Published:2005-10-20

摘要: 使用美国NCAR新版MM5V3.6非静力平衡模式,采用三重嵌套的降尺度方法,模拟研究了甘肃河西走廊金塔绿洲风场与温湿场特征。结果表明:由于绿洲的存在,绿洲沙漠系统产生的次级环流对局地环流有一定影响;平流作用将沙漠中的干热空气送向绿洲,绿洲近地层会出现逆温,感热向地表输送;沙漠上由于临近绿洲的水汽平流作用,上层大气湿度比低层更大,这就是逆湿现象。

关键词: 绿洲沙漠环流, 绿洲效应, 逆湿现象, 数值模拟

Abstract: Using the NCAR nonhydrostatic mesoscale model MM5V3.6 and through triple nested technique, we simulated the characteristics of wind field, air temperature and humidity field in Jinta Oasis, middle reaches of Heihe river basin in Hexo Corridor. The main results show that oasis-desert circulation has influence to the local circulation. When dry and hot air in desert is advected to oasis, the inverse temperature phenomenon appears in oasis and sensitive heat flux transports inversely. Because of the vapor advection near oasis, the atmospheric specific humidity in desert is higher and higher from the bottom up. That is the inverse humidity phenomenon.

Key words: oasis-desert circulation, oasis effect, inverse humidity phenomenon, numerical simulation

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