高原气象

高原气象 >

2017 , Vol. 36 >Issue 1: 1 - 12

DOI: https://doi.org/10.7522/j.issn.1000-0534.2016.00012

论文

陆面模式CLM4.5对青藏高原高寒草甸地表能量交换模拟性能的评估

  • 谢志鹏 ,
  • 胡泽勇 ,
  • 刘火霖 ,
  • 孙根厚 ,
  • 杨耀先 ,
  • 蔺筠 ,
  • 黄芳芳
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  • 中国科学院西北生态环境资源研究院 寒区旱区陆面过程与气候变化重点实验室, 兰州 730000;中国科学院青藏高原地球科学卓越创新中心, 北京 100101;泉州市气象局, 福建 362000;中国科学院大气物理研究所, 北京 100029;中国科学院大学, 北京 100049

收稿日期: 2015-09-11

  网络出版日期: 2017-02-28

基金资助

国家自然科学基金项目（91337212，91537101，41661144043，91637313）；公益性行业（气象）科研专项（GYHY201406001）

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Evaluation of the Surface Energy Exchange Simulations of Land Surface Model CLM4.5 in Alpine Meadow over the Qinghai-Xizang Plateau

  • XIE Zhipeng ,
  • HU Zeyong ,
  • LIU Huolin ,
  • SUN Genhou ,
  • YANG Yaoxian ,
  • LIN Yun ,
  • HUANG Fangfang
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  • Key Laboratory for Land Process and Climate Change in Cold Arid Regions, Northwest Institute of Eco-Environment and Resources, Chinese Academy of Sciences, Lanzhou 730000, China;Chinese Academy of Sciences Center for Excellence in Tibetan Plateau Earth Sciences, Beijing 100101, China;Quanzhou Meteorological Bureau, Quanzhou 362000, China;Institute of Atmosphere and Physics, Chinese Academy of Sciences, Beijing 100029, China;University of Chinese Academy of Sciences, Beijing 100049, China

Received date: 2015-09-11

  Online published: 2017-02-28

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摘要

利用中国科学院那曲高寒气候环境观测研究站2013年9月1日至2014年8月31日一个完整年的观测资料，对陆面过程模式CLM4.5在青藏高原（下称高原）高寒草甸下垫面地表能量交换的模拟性能进行了评估。模拟结果表明，CLM4.5能够较好的模拟高原春季、夏季和秋季非冻结期地面长波、反射辐射和地表净辐射、感热和潜热通量以及地表土壤热通量等的季节变化和日循环特征。但对冬季冻结期地表温度的模拟偏低，导致模拟与观测的感热反相，对地面反射辐射模拟偏大。截断冬季降水的敏感性试验进一步指出，模式冬季反射辐射偏大主要是由于积雪引起的地表反照率偏高造成，进而造成地表温度以及感热通量的模拟偏低。因此，高原积雪参数化方案以及与积雪相关的反照率参数化方案还需进一步改进和完善。

关键词： 青藏高原; CLM; 陆面过程; 辐射收支; 水热交换; 反照率

本文引用格式

谢志鹏 , 胡泽勇 , 刘火霖 , 孙根厚 , 杨耀先 , 蔺筠 , 黄芳芳 . 陆面模式CLM4.5对青藏高原高寒草甸地表能量交换模拟性能的评估[J]. 高原气象, 2017 , 36(1) : 1 -12 . DOI: 10.7522/j.issn.1000-0534.2016.00012

Abstract

Driven by a full year observations from 1 September 2013 to 31 August 2014 of Nagqu Climatic and Environmental observation station in the Qinghai-Xizang Plateau, the land surface model CLM4.5 is used to evaluate its performance in simulating the surface energy exchange in the alpine meadow over the Qinghai-Xizang Plateau.Results indicate that CLM4.5 can reproduce the characteristics of seasonal variation and diurnal cycle of the surface longwave radiation, reflected radiation, net radiation, sensible latent heat flux and soil heat flux in spring, summer and fall when the soil does not freeze completely.However, the model underestimates the surface temperature in winter, which leads the reverse of sensible heat flux between simulations and observations during this period, while overestimates the reflected radiation.Results from the sensitive test further demonstrate that the overestimation of surface albedo can lead to the overestimation of reflected radiation in winter, causing the underestimation of surface temperature and the sensible heat flux.Consequently, the parameterization schemes of snow processes and surface albedos in CLM4.5 need to be further improved.

Key words： Qinghai-Xizang Plate; CLM; Land surface process; Radiation budget; Water and heat excha; Albedo

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