期刊名称：ISPRS Annals of the Photogrammetry, Remote Sensing and Spatial Information Sciences
印刷版ISSN：2194-9042
电子版ISSN：2194-9050
出版年度：2007
卷号：XXXVI-7/C50
出版社：Copernicus Publications
摘要：Carbon dioxide exchange between vegetation and the atmosphere is determined by absorption of solar radiation by plant leaves and by turbulent transfer in the surface layer. This led to two different streams of methods to estimate carbon flux density: A) models based on parameterizations of aerodynamic resistance, and B) modeling of radiative transfer processes in vegetation canopies. We present here a comparison of one approach of type A (the C-TESSEL model) and one approach of type B (the MODIS gross primary production, i.e. GPP data product). The C-TESSEL model is the extension of the ECMWF land surface scheme TESSEL (Van den Hurk et al., 2000), in which a photosynthesis-based canopy resistance (Jacobs, 1994; Jacobs et al., 1996) and a carbon allocation scheme (Calvet et al., 1998) that represents leaf growth in response to photosynthesis is included. The MODIS GPP is estimated based on the radiation use efficiency logic proposed by Monteith (1972; 1977), which links net primary productivity (NPP) to the absorbed photosynthetically active radiation (APAR). The latter can be obtained by inverting spectro-radiometric data using a radiative transfer model.
