%0 Journal Article
%T Simulation of CO2 exchange between forest canopy and atmosphere<br>林冠与大气间二氧化碳交换过程的模拟
%A DIAO Yiwei
%A WANG Anzhi
%A JIN Changjie
%A GUAN Dexin
%A PEI Tiefan
%A <br>刁一伟
%A 王安志
%A 金昌杰
%A 关德新
%A 裴铁璠
%J 应用生态学报
%D 2006
%I 
%X Estimating the scalar source/sink distribution of CO2 and its vertical fluxes within and above forest canopy continues to be a critical research problem in biosphere-atmosphere exchange processes and plant ecology. With broad-leaved Korean pine forest in Changbai Mountains as test object, and based on Raupach's localized near field theory, the source/sink and vertical flux distribution of CO2 within and above forest canopy were modeled through an inverse Lagrangian dispersion analysis. This model correctly predicted a strong positive CO2 source strength in the deeper layers of the canopy due to soil-plant respiration, and a strong CO2 sink in the upper layers of the canopy due to the assimilation by sunlit foliage. The foliage in the top layer of canopy changed from a CO2 source in the morning to a CO2 sink in the afternoon, while the soil constituted a strong CO2 source all the day. The simulation results accorded well with the eddy covariance CO2 flux measurements within and above the canopy, and the average precision was 89%. The CO2 exchange predicted by the analysis was averagely 15% higher than that of the eddy correlation, but exhibited identical temporal trend. Atmospheric stability remarkably affected the CO2 exchange between forest canopy and atmosphere.
%K Lagrangian model
%K CO2 flux exchange
%K Source/sink strength
%K Forest canopy<br>拉格朗日模型
%K CO2通量交换
%K 源汇强度
%K 森林冠层
%U http://www.alljournals.cn/get_abstract_url.aspx?pcid=90BA3D13E7F3BC869AC96FB3DA594E3FE34FBF7B8BC0E591&jid=42FEDDFE54F8BCD9D5FD1926ABDD7722&aid=327EE1D7F34AAAC0&yid=37904DC365DD7266&vid=BCA2697F357F2001&iid=59906B3B2830C2C5&sid=B864B51C79B25D7B&eid=D53D369D01F50334&journal_id=1001-9332&journal_name=应用生态学报&referenced_num=0&reference_num=25