地球科学进展

地球科学进展 ›› 2006, Vol. 21 ›› Issue (12): 1283 -1282. doi: 10.11867/j.issn.1001-8166.2006.12.1283

研究论文 上一篇    下一篇

陆面水文过程与大气模式的耦合及其在黑河流域的应用
高艳红 1,程国栋 1,崔文瑞 1,CHEN Fei 2,David Gochis 2,YU Wei 2   
  1. 1.中国科学院寒区旱区环境与工程研究所，甘肃 兰州 730000;2.National Center for Atmospheric Research/RAP, Boulder, Colorado,USA 
  • 收稿日期:2006-10-11 修回日期:2006-11-13 出版日期:2006-12-15
  • 通讯作者: 高艳红 E-mail:gaoyh@lzb.ac.cn
  • 基金资助:

    国家自然科学基金项目“黑河流域大气—水文相互作用的数值研究”（编号号：40405021）；中国科学院寒区旱区环境与工程研究所创新项目“西北干旱区气候变化和陆气相互作用研究”（编号：2004109）和“黑河流域交叉集成研究的模型开发和模拟研究建设”（编号：2003102）;中国科学院院长奖专项项目(编号：2005409)共同资助.

Coupling of Enhanced Land Surface Hydrology with Atmospheric Mesoscale Model and Its Implement in Heihe River Basin

Gao Yanhong 1,Cheng Guodong 1,Cui Wenrui 1,Chen Fei 2,David Gochis 2,Yu  Wei 2   

  1. 1.Cold and Arid Regions Enviromental and Engineering Research Institute, CAS, Lanzhou 730000,China;2.National Center for Atmospheric Research/RAP, Boulder, Colorado, USA
  • Received:2006-10-11 Revised:2006-11-13 Online:2006-12-15 Published:2006-12-15
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陆面过程模式对陆面水文过程有比较详尽的描述，然而，目前的陆面水文过程只考虑了垂直方向的水分运移，比较适合平坦地区的模拟，而在地形坡度较大的山区只考虑垂直方向的水分移动是不够的，尤其是目前随着计算机条件提高，分辨率越来越高，地表水以及土壤水的侧向流动成为山区水文过程必须考虑的部分。同时，目前的陆面过程模式中的径流量是作为诊断量处理，不参与运算。针对以上问题，对Noah陆面过程模式进行了改进，增加了地表积水和积水蒸发、坡面汇流方案、次表面流方案，并且将Routing模块通过次网格过程与大气中尺度模式MM5耦合，发展了高分辨率大气—水文耦合模式。运用发展的高分辨率大气—水文耦合模式，对黑河流域中上游2003年6月23~25日降水过程进行了模拟，研究了陆面水循环过程对大气场的影响。结果表明陆面水循环过程对近地层大气影响很大，首先影响了土壤的湿度与蒸发，进而对边界层稳定性，云结构、云水、雨水含量产生影响，对区域降水也有一定影响。

关键词: MM5, 侧向流动, 黑河流域, 陆面水文过程

Hydrological processes are described in detail in modern land surface models. While water move vertically. It is proper to be used in plat zone more than mountainous region, where the water move laterally more than in vertical direction.High-resolution simulation become reality as the compute capability boosts. Lateral routing flow of surface water and subsurface soil water become necessary in land surface simulation in mountainous regions. Meanwhile, runoff is treated as a diagnose variable and does not take part in the water moving. Based on all of these, Noah model coupled with MM5 was enhanced. The evaporation of pond water and re-infiltration were taken into account in the land surface model and the overland routing and subsurface routing parameterization were added into land surface scheme. Routing module is linked with MM5 through the disaggregating/aggregating method. Then, the high-resolution atmosphere-hydrology coupling model suitable for mountainous regions was developed. With this developed atmospheric-hydrologic coupling model used, the rain fall event on June 23-25 , 2003 in Heihe River basin was simulated to study the feedback of land surface water cycle in atmosphere. It is indicated that the atmospheric fields were influenced by land surface water cycle process to large extent. Firstly, the soil moisture and evaporation increased after adding the land surface routing. Secondly, boundary layer stability is weaker. Then, the cloud water and rain water were affected. Precipitation simulation was also affected.

Key words: Lateral routing flow, Land surface hydrology process, MM5, Heihe River Basin.

中图分类号: 

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