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地球科学进展  2009, Vol. 24 Issue (7): 734-740    DOI: 10.11867/j.issn.1001-8166.2009.07.0734
能水平衡观测与模拟     
基于LPJ模型的制种玉米碳水通量模拟研究
王旭峰,马明国
中国科学院寒区旱区环境与工程研究所,甘肃  兰州  730000
Carbon and water fluxes of cornfield simulated with LPJ model
Wang Xufeng, Ma Mingguo
Cold and Arid Regions Environmental and Engineering Research Institute, Chinese Academy of Sciences, Lanzhou 730000, China
 全文: PDF(1464 KB)  
摘要:

Lund-Potsdam-Jena Dynamic Global Vegetation Model (LPJ)模型是由Lund University, Potsdam Climate Research Centre和Max-Planck-Institute for Biogeochemistry, Jena联合开发的植被动态模型,该模型以气候、土壤质地和CO2数据作为输入模拟植被与环境的碳水交换过程。为了利用高时间分辨率的输入数据,对模型的代码进行了改写。张掖绿洲盈科站位于干旱区绿洲典型的农田生态系统。应用其观测资料作为LPJ的输入,模拟了张掖绿洲制种玉米的碳水通量,并用涡动观测到的潜热和CO2通量验证蒸散发和NEE的模拟结果。结果表明LPJ模型能够较好地模拟制种玉米与环境之间的碳水交换,蒸散发(ET)的模拟值与观测值的R2为0.8;NEE的模拟值与观测值的R2为0.79。
    

关键词: 蒸散发(ET)NEELPJ农田生态系统    
Abstract:

The Lund-Potsdam-Jena Dynamic Global Vegetation Model (LPJ), as one of the Dynamic Global Vegetaion Model (DGVM), was developed by Lund University,Potsdam Climate Research Centre and Max-Planck-Institute for Biogeochemistry, Jena. The climatic parameters, soil texture and CO2 concentration data were used as the inputs to simulate carbon and water exchange process between ecosystem and environment. In order to use daily input data, the LPJ code was rewritten in Visual Basic based on the original Fortran version, which was downloaded from the website of PIK. Yingke Oasis Station is located in a corn field (100°25′E, 38°51′N, 1 519 m) and 8 km far from Zhangye City, which belongs to a typical oasis cropland ecosystem in the inland river basin of the arid regions of China. Its observation items include wind speed, air temperature and humidity (3 m & 10 m), wind direction, air pressure precipitation, four components of radiation, land surface temperature, soil temperature and moisture profile (10 cm, 20 cm, 40 cm, 80 cm, 120 cm, and 160 cm), and heat flux (5 cm & 15 cm) and Eddy Covariance. Some items of these observations were used as the inputs of LPJ model to simulate evapotranspiration (ET) and NEE of corn field in Yingke. The latent heat flux and CO2 flux data observed from Eddy Covariance system were used to validate the simulated results. The results indicate that the LPJ model can better simulate water and carbon exchange between vegetation and environment. The R square of ET simulated by LPJ and observed by Eddy Covariance in Yingke is close to 0.8. The ET was also observed by the Micro-Lysimeter, which was also closed to the LPJ simulated results. The R square of NEE simulated by LPJ and observed by Eddy Covariance can reach 0.79.

Key words: Evapotranspiration    NEE    LPJ    Cropland ecosystem
收稿日期: 2009-02-18 出版日期: 2009-07-10
:  P433  
基金资助:

中国科学院西部行动计划(二期)项目“黑河流域遥感—地面观测同步试验与综合模拟平台建设”(编号:KZCX2-XB2-09-03);国家重点基础研究发展计划项目“干旱区绿洲化、荒漠化过程及其对人类活动、气候变化的响应与调控”(编号:2007CB714401);国家自然科学基金面上项目“陆地碳循环遥感与模型模拟的融合方法研究”(编号:40871190)联合资助.

通讯作者: 王旭峰     E-mail: wxfgis2002@sina.com
作者简介: 王旭峰(1984-),男,甘肃会宁人,硕士研究生,主要从事植被动态模拟研究. E-mail:wxfgis2002@sina.com
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引用本文:

王旭峰,马明国. 基于LPJ模型的制种玉米碳水通量模拟研究[J]. 地球科学进展, 2009, 24(7): 734-740.

Wang Xufeng, Ma Mingguo. Carbon and water fluxes of cornfield simulated with LPJ model. Advances in Earth Science, 2009, 24(7): 734-740.

链接本文:

http://www.adearth.ac.cn/CN/10.11867/j.issn.1001-8166.2009.07.0734        http://www.adearth.ac.cn/CN/Y2009/V24/I7/734

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