论文

CLM4.0土壤水分传输方案改进在青藏高原陆面过程模拟中的效应

  • 熊建胜 ,
  • 张宇 ,
  • 王少影 ,
  • 尚伦宇 ,
  • 陈云刚 ,
  • 沈晓燕
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  • 中国科学院寒区旱区环境与工程研究所 寒旱区陆面过程与气候变化重点实验室, 兰州 730000;2. 中国科学院大学, 北京 100049

收稿日期: 2013-12-23

  网络出版日期: 2014-04-28

基金资助

公益性行业专项(GYHY201306020,GYHY201106022);国家自然科学基金项目(41205006,41275016);中国科学院寒区旱区环境与工程研究所青年人才成长基金(51Y351181)

Influence of Soil Moisture Transmission Scheme Improvement in CLM4.0 on Simulation of Land Surface Process in Qinghai-Xizang Plateau

  • XIONG Jiansheng ,
  • ZHANG Yu ,
  • WANG Shaoying ,
  • SHANG Lunyu ,
  • CHEN Yungang ,
  • SHEN Xiaoyan
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  • Key Laboratory of Land Surface Process and Climate Change in Cold and Arid Regions, Cold and Arid Regions Environment Research Institute, Chinese Academy of Science, Lanzhou 730000, China;2. University of Chinese Academy of Sciences, Beijing 100049, China

Received date: 2013-12-23

  Online published: 2014-04-28

摘要

利用2010年5月25日-12月31日玛曲高寒草原的气象观测资料和陆面过程模式(CLM4.0)对玛曲高寒草原陆面过程进行了数值模拟。通过评估模式的模拟性能、模式对含砂量的敏感程度以及模式土壤水分传输方案改进对青藏高原地区陆面过程模拟的影响,发现CLM4.0模式能较好地再现观测站土壤温、湿度、地表辐射、湍流通量等的变化趋势,但土壤温度模拟偏低,感热通量模拟偏大;含砂量增多会减弱土壤的持水能力,使得夏季感热通量增大而潜热通量减小;CLM4.0模式中新引入的有机质对土壤温、湿度模拟均有重要影响,Richards方程和径流计算的修改则对土壤含水量模拟影响较大,这对其他陆面模式的改进具有一定的指导意义。

本文引用格式

熊建胜 , 张宇 , 王少影 , 尚伦宇 , 陈云刚 , 沈晓燕 . CLM4.0土壤水分传输方案改进在青藏高原陆面过程模拟中的效应[J]. 高原气象, 2014 , 33(2) : 323 -336 . DOI: 10.7522/j.issn.1000-0534.2014.00012

Abstract

Using the Community Land Model version 4.0(CLM4.0) and the observed meteorological data at Maqu station in the Qinghai-Xizang Plateau from 25 May to 31 December 2010 as the forcing data, several simulation experiments have been done. After evaluating the model simulation performance, the model sensitivity to the sand content and the effect of soil moisture transmission scheme improvement on the simulation of land surface process in the Qinghai-Xizang Plateau, it is found that the model can reflect the variation trend of soil temperature and moisture, surface radiation, turbulance energy at Maqu station, but the simulated soil temperature is low and sensible heat flux is too large. The increase of the sand content will decrease the water holding capacity of soil, which leads to the sensible heat flux increasing and latent heat flux decreasing in summer. The organic matters added in CLM4.0 have an important influence on the simulation of both soil temperature and moisture, however, the modified Richards equation and runoff parameters affect much more the simulation of soil moisture, which is a guide to the improvement of other land surface models.

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