高原气象

高原气象 >

2017 , Vol. 36 >Issue 2: 424 - 435

DOI: https://doi.org/10.7522/j.issn.1000-0534.2016.00044

论文

植被对黄河源区水热交换影响的研究

  • 贾东于 ,
  • 文军 ,
  • 马耀明 ,
  • 刘蓉 ,
  • 王欣 ,
  • 周娟 ,
  • 陈金雷
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  • 中国科学院西北生态环境资源研究院 寒旱区陆面过程与气候变化重点实验室, 兰州 730000;中国科学院大学, 北京 100049;高原大气与环境四川省重点实验室, 成都信息工程大学大气科学学院, 成都 610225;中国科学院青藏高原研究所, 北京 100101

收稿日期: 2016-01-18

  网络出版日期: 2017-04-28

基金资助

国家自然科学基金项目（41530529，41375022，41675157）；中国科学院重点部署项目（KZZD-EW-13）

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Impacts of Vegetation on Vater and Heat Exchanges in the Source Region of Yellow River

  • JIA Dongyu ,
  • WEN Jun ,
  • MA Yaoming ,
  • LIU Rong ,
  • WANG Xin ,
  • ZHOU Juan ,
  • CHEN Jinlei
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  • Key Laboratory of Land Surface Process and Climate Change in Cold and Arid Regions, Northwest Institute of Eco-Environment and Resources, Chinese Academy of Sciences, Lanzhou 730000, China;University of Chinese Academy of Sciences, Beijing 100049, China;College of Atmospheric Sciences, Plateau Atmosphere and Environment Key Laboratory of Sichuan Province, Chengdu University of Information Technology, Chengdu 610225, China;Key Laboratory of Tibetan Environment Change and Land Surface Process, Institute of Tibetan Plateau Research, Chinese Academy of Sciences, Beijing 100101, China

Received date: 2016-01-18

  Online published: 2017-04-28

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摘要

利用2013-2014年6-8月黄河源区近地面的观测数据进行CLM4.5单点模拟植被变化对近地面水热交换影响和能量平衡的研究。结果表明：（1）100%植被覆盖与控制试验（植被覆盖度为50%）向上短波的模拟差值为-6.76 W·m-2，裸地（植被覆盖度为0%）与控制试验的差值为7.76 W·m-2。（2）植被覆盖度降低对向上长波辐射的模拟影响较大，其中裸地与控制试验的向上长波辐射模拟差值为5.34 W·m-2，而100%植被覆盖与控制试验的向上长波模拟差值仅为-0.62 W·m-2。（3）叶面积指数减少会使地表反照率增大，但辐射通量整体变化幅度不大。其中向上短波平均增加1.35 W·m-2，潜热平均减小8.43 W·m-2。（4）叶面积指数增加会使向上长、短波减少，同时潜热通量输送增大，且叶面积指数增加后，向上长波辐射、感热的变化范围略大于叶面积指数减少时。（5）净辐射受到云的影响较大，其变化范围为200~461 W·m-2。6-7月的土壤热通量在2013年不同深度均达到峰值，其中5 cm深处土壤热通量在6-7月的平均值为6.25 W·m-2，最大值为30.34 W·m-2。

关键词： 黄河源区; 能量平衡; 植被覆盖度; 数值模拟

本文引用格式

贾东于 , 文军 , 马耀明 , 刘蓉 , 王欣 , 周娟 , 陈金雷 . 植被对黄河源区水热交换影响的研究[J]. 高原气象, 2017 , 36(2) : 424 -435 . DOI: 10.7522/j.issn.1000-0534.2016.00044

Abstract

The land surface radiation budget and the impacts of vegetation on water and heat exchanges are the keys of land surface process.By using the field observed data at Maduo from 2013 to 2014, the characteristics of surface radiation budget were analyzed under different types of synoptic conditions.The results show that: (1) The different value of upward shortwave radiation is about 7.76 W·m-2, between 100% vegetation covered and the control test.However, the different value of upward longwave radiation is only-0.62 W·m-2.(2) The difference value of simulated longwave radiation between bare land and controlled test is about 5.34 W·m-2.Moreover, the difference value between 100% vegetation covered and the control test is just-0.62 W·m-2.(3) The decrease of LAI value has an influence on the increasing land surface albedo.Furthermore, the radiation flux and the surface turbulence flux change little.The upward shortwave radiation increases just about 1.35 W·m-2.Meanwhile, the latent heat decreases about 8.43 W·m-2.(4) On the other hand, the increasing LAI have an impact on the decrease of upward shortwave radiation and upward longwave radiation.What's more, the variation of radiation flux is larger when LAI increasing than LAI decreasing.(5) The radiation flux reveals obvious diurnal variation.The net radiation varies from 200 W·m-2 to 461 W·m-2 under different types of synoptic conditions.The soil heat flux at different depths reaches the peak from June to July in 2013.

Key words： Source region of Yel; Surface radiation bu; Vegetation coverage; Model simulation

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