Evaluation of Land Surface Models in Reproducing Satellite-Derived LAI   over the High-Latitude Northern Hemisphere. Part I: Uncoupled DGVMs

doi:10.3390/rs5104819

CORC > 北京大学 > 城市与环境学院

	Evaluation of Land Surface Models in Reproducing Satellite-Derived LAI over the High-Latitude Northern Hemisphere. Part I: Uncoupled DGVMs
	Murray-Tortarolo, Guillermo ; Anav, Alessandro ; Friedlingstein, Pierre ; Sitch, Stephen ; Piao, Shilong ; Zhu, Zaichun ; Poulter, Benjamin ; Zaehle, Soenke ; Ahlstrom, Anders ; Lomas, Mark ; Levis, Sam ; Viovy, Nicholas ; Zeng, Ning
刊名	remote sens basel
	2013
关键词	LAI land surface models growing season trendy northern hemisphere phenology LEAF-AREA-INDEX GLOBAL VEGETATION MODEL PHOTOSYNTHETICALLY ACTIVE RADIATION PLANT GEOGRAPHY TIME-SERIES FOREST CARBON ALGORITHM BOREAL DYNAMICS
DOI	10.3390/rs5104819
英文摘要	Leaf Area Index (LAI) represents the total surface area of leaves above a unit area of ground and is a key variable in any vegetation model, as well as in climate models. New high resolution LAI satellite data is now available covering a period of several decades. This provides a unique opportunity to validate LAI estimates from multiple vegetation models. The objective of this paper is to compare new, satellite-derived LAI measurements with modeled output for the Northern Hemisphere. We compare monthly LAI output from eight land surface models from the TRENDY compendium with satellite data from an Artificial Neural Network (ANN) from the latest version (third generation) of GIMMS AVHRR NDVI data over the period 1986-2005. Our results show that all the models overestimate the mean LAI, particularly over the boreal forest. We also find that seven out of the eight models overestimate the length of the active vegetation-growing season, mostly due to a late dormancy as a result of a late summer phenology. Finally, we find that the models report a much larger positive trend in LAI over this period than the satellite observations suggest, which translates into a higher trend in the growing season length. These results highlight the need to incorporate a larger number of more accurate plant functional types in all models and, in particular, to improve the phenology of deciduous trees.; Remote Sensing; SCI(E); EI; 3; ARTICLE; 10; 4819-4838; 5
语种	英语
内容类型	期刊论文
源URL	[http://ir.pku.edu.cn/handle/20.500.11897/390978]
专题	城市与环境学院
推荐引用方式 GB/T 7714	Murray-Tortarolo, Guillermo,Anav, Alessandro,Friedlingstein, Pierre,et al. Evaluation of Land Surface Models in Reproducing Satellite-Derived LAI over the High-Latitude Northern Hemisphere. Part I: Uncoupled DGVMs[J]. remote sens basel,2013.
APA	Murray-Tortarolo, Guillermo.,Anav, Alessandro.,Friedlingstein, Pierre.,Sitch, Stephen.,Piao, Shilong.,...&Zeng, Ning.(2013).Evaluation of Land Surface Models in Reproducing Satellite-Derived LAI over the High-Latitude Northern Hemisphere. Part I: Uncoupled DGVMs.remote sens basel.
MLA	Murray-Tortarolo, Guillermo,et al."Evaluation of Land Surface Models in Reproducing Satellite-Derived LAI over the High-Latitude Northern Hemisphere. Part I: Uncoupled DGVMs".remote sens basel (2013).