干旱区生态环境知识资源中心(Arid): 半干旱区农田和草地与大气间二氧化碳和水热通量的模拟研究

Arid

	半干旱区农田和草地与大气间二氧化碳和水热通量的模拟研究
其他题名	Simulation of CO2 and Sensible/Latent Heat Fluxes Exchange between Land Surface and Atmosphere over Cropland and Grassland in Semi-Arid Region
	姜纪峰 1; 延晓冬 2; 黄耀 1; 郭维栋 2; 刘辉志 3; 王淑瑜 2
ISSN	1006-9585
出版年	2006
卷号	11 期号:3 页码:413-424
中文摘要	集成生物圈模型（IBIS）是目前最复杂的基于动态植被模型的陆面生物物理模型之一。通过应用该模型对国际协调强化观测计划（CEOP）半干旱区基准站之一的吉林通榆观测站（44°25′N，122°52′E）草地和农田生态系统2003年全年的CO2和水、热通量变化进行模拟，并将结果与涡度相关法测定的观测值进行了对比分析，以检验IBIS模型在半干旱区的模拟能力。对比结果表明：除CO2通量模拟结果不够理想外，IBIS模型较好地模拟了通榆观测站的感热通量和潜热通量。模拟与观测比较的相关系数均通过了0．05以上显著性水平的信度检验。总体上看，模型对农田生态系统模拟的偏差小于对退化草地的模拟。
英文摘要	The Integrated Biosphere Simulator （IBIS） is one of the most sophisticated models in simulating terrestrial biosphere processes based on dynamic vegetation schemes. For the purpose of validating IBIS in semi-arid region and eventually improving the model＇s capability for specific land cover types in China, a simulation for the whole 2003 year was conducted over cropland and degraded grassland in Tongyu field observation station （44°25′N, 122°52′E） in Jilin Province of China, which is one of the reference sites of international Coordinated Enhanced Observing Period （CEOP）. Model inputs include the site ecosystem characteristics and main meteorological variables. Comparisons between simulated land surface fluxes and observed eddy covariance （EC） measurements show that the model is capable of reproducing CO2, sensible and latent heat fluxes indicated by correlation coefficients exceeding the significant level of 0.05. In general, CO2 flux and sensible heat flux have obvious diurnal and seasonal variation both at the grassland and the cropland, while the latent heat flux, which is related to evapotranspimtion, only has diurnal variation during the growing season. Meanwhile, all fluxes at the cropland are larger than those at the degraded grassland, especially in the growing season, and one of possible reasons for these is that crops grow much better than degraded grass. The model generally estimates lower annual CO2 （underestimating 9. 29% in the grassland and 3. 73% in the cropland） and latent heat flux （with corresponding percents 4. 63% and 3. 48%）, and greater annual sensible heat flux （overestimating 9.90 M and 11.98 %, respectively） than measured by EC. And the simulations for the cropland are better than those for the grassland, with more reasonable model-measurement agreements.
中文关键词	IBIS模型 ; CO2通量 ; 感热通量 ; 潜热通量
英文关键词	IBIS COz flux sensible heat flux latent heat flux
语种	中文
国家	中国
收录类别	CSCD
WOS类目	METEOROLOGY ATMOSPHERIC SCIENCES
WOS研究方向	Meteorology & Atmospheric Sciences
CSCD记录号	CSCD:2450139
来源机构	中国科学院大气物理研究所
资源类型	期刊论文
条目标识符	http://119.78.100.177/qdio/handle/2XILL650/219991
作者单位	1.南京农业大学资源与环境科学学院, 南京, 江苏 210095, 中国; 2.中国科学院大气物理研究所全球变化东亚区域研究中心, 东亚区域气候-环境重点实验室, 北京 100029, 中国; 3.中国科学院大气物理研究所, 大气边界层物理和大气化学国家重点实验室, 北京 100029, 中国
推荐引用方式 GB/T 7714	姜纪峰,延晓冬,黄耀,等. 半干旱区农田和草地与大气间二氧化碳和水热通量的模拟研究[J]. 中国科学院大气物理研究所,2006,11(3):413-424.
APA	姜纪峰,延晓冬,黄耀,郭维栋,刘辉志,&王淑瑜.(2006).半干旱区农田和草地与大气间二氧化碳和水热通量的模拟研究.,11(3),413-424.
MLA	姜纪峰,et al."半干旱区农田和草地与大气间二氧化碳和水热通量的模拟研究".11.3(2006):413-424.