中国农业气象 ›› 2011, Vol. 32 ›› Issue (增刊): 63-68.

• 论文 • 上一篇    下一篇

基于RegCM3的贵州石漠化地区农业气象要素分布的敏感性模拟

罗宇翔,陈娟,郑小波   

  1. 贵州省山地环境气候研究所/贵州省气候与资源重点实验室,贵阳 550002
  • 出版日期:2011-10-31 发布日期:2011-11-24
  • 基金资助:

    国家自然科学基金(40765004);贵州省社会发展攻关项目(SZ\[2008\]3019);贵州省科技计划项目(黔科合Z字\[2009\]4006号)

Simulation of the Agricultural meteorology Factors Change in Karst Desertification in Guizhou Province by Using Regional Climate Model (RegCM3)

LUO Yuxiang, CHEN Juan, ZHENG Xiaobo   

  1. Guizhou Institute of Mountainous Environment and Climate/Guizhou Key Laboratory of Mountainous Climate and Resource , Guiyang 550002,China
  • Online:2011-10-31 Published:2011-11-24

摘要: 喀斯特地区的石漠化现象不但对生态环境,而且对农业气象要素的分布都产生影响。应用RegCM3区域气候模式,在分辨率为20km×20km条件下,通过石漠化(2000年)和非石漠化2组模拟数值实验,检验了石漠化对农业气象要素分布的影响。结果表明,石漠化引起了该地区农业气象要素空间分布变化。(1)石漠化区域及周边大部分地区的月降水量减少了20~80mm,小部分地区增加,降水的变率加大;(2)部分地区的地面温度上升。在不同的季节,上升的幅度不同,其中春、秋两季的温度增加较为明显,为0.2~2.0℃;(3)在非汛期,石漠化区域地面相对湿度下降2%~8%,但在雨季,石漠化对相对湿度的影响不明显;(4)石漠化区域的总蒸散量略有下降。在夏季,石漠化使该区域的地面蒸发量明显增加。

关键词: RegCM3, 喀斯特石漠化, 数值模拟, 区域气候

Abstract: The phenomenon of the Karst desertification not only impacts the ecological environment but also alter the distribution of agriculturalmeteorology factors. Regional climate model (RegCM3) was applied to explore the possible effects of land use changes on local and regional climate over the Karst desertification area in Guizhou. With the resolution of 20km×20km, two numerical simulation experiments were conducted. One was a control experiment with more vegetation land use and the other is the desertification in 2000. Preliminary analysis indicated that the desertification over the area of Guizhou caused different climate effects in different regions and seasons. In the most parts of the desertification area the month precipitation decreased from 20mm to 80mm, and it increased in some other area. In summer and autumn, surface air temperatures increased obviously in the area of the Karst desertification. 〖JP2〗In dry season the relative humidity decreased about 2%~8%,but did not change obviously in rainy season in the desertification area. The evapotranspiration reduced a little, and the evaporation increased distinctly in summer in the desertification area.

Key words: RegCM3, Karst desertification, Numerical simulation, Regional climate