Improving the dynamics of Northern Hemisphere high-latitude vegetation   in the ORCHIDEE ecosystem model

doi:10.5194/gmd-8-2263-2015

CORC > 北京大学 > 城市与环境学院

	Improving the dynamics of Northern Hemisphere high-latitude vegetation in the ORCHIDEE ecosystem model
	Zhu, D. ; Peng, S. S. ; Ciais, P. ; Viovy, N. ; Druel, A. ; Kageyama, M. ; Krinner, G. ; Peylin, P. ; Ottle, C. ; Piao, S. L. ; Poulter, B. ; Schepaschenko, D. ; Shvidenko, A.
刊名	GEOSCIENTIFIC MODEL DEVELOPMENT
	2015
DOI	10.5194/gmd-8-2263-2015
英文摘要	Processes that describe the distribution of vegetation and ecosystem succession after disturbance are an important component of dynamic global vegetation models (DGVMs). The vegetation dynamics module (ORC-VD) within the process-based ecosystem model ORCHIDEE (Organizing Carbon and Hydrology in Dynamic Ecosystems) has not been updated and evaluated since many years and is known to produce unrealistic results. This study presents a new parameterization of ORC-VD for mid- to high-latitude regions in the Northern Hemisphere, including processes that influence the existence, mortality and competition between tree functional types. A new set of metrics is also proposed to quantify the performance of ORC-VD, using up to five different data sets of satellite land cover, forest biomass from remote sensing and inventories, a data-driven estimate of gross primary productivity (GPP) and two gridded data sets of soil organic carbon content. The scoring of ORC-VD derived from these metrics integrates uncertainties in the observational data sets. This multi-data set evaluation framework is a generic method that could be applied to the evaluation of other DGVM models. The results of the original ORC-VD published in 2005 for mid- to high-latitudes and of the new parameterization are evaluated against the above-described data sets. Significant improvements were found in the modeling of the distribution of tree functional types north of 40 degrees N. Three additional sensitivity runs were carried out to separate the impact of different processes or drivers on simulated vegetation distribution, including soil freezing which limits net primary production through soil moisture availability in the root zone, elevated CO2 concentration since 1850, and the effects of frequency and severity of extreme cold events during the spin-up phase of the model.; GAP Swedish-French project; ERC-Syg grant P-Imbalance; SCI(E); ARTICLE; dan.zhu@lsce.ipsl.fr; 7; 2263-2283; 8
语种	英语
内容类型	期刊论文
源URL	[http://ir.pku.edu.cn/handle/20.500.11897/421113]
专题	城市与环境学院
推荐引用方式 GB/T 7714	Zhu, D.,Peng, S. S.,Ciais, P.,et al. Improving the dynamics of Northern Hemisphere high-latitude vegetation in the ORCHIDEE ecosystem model[J]. GEOSCIENTIFIC MODEL DEVELOPMENT,2015.
APA	Zhu, D..,Peng, S. S..,Ciais, P..,Viovy, N..,Druel, A..,...&Shvidenko, A..(2015).Improving the dynamics of Northern Hemisphere high-latitude vegetation in the ORCHIDEE ecosystem model.GEOSCIENTIFIC MODEL DEVELOPMENT.
MLA	Zhu, D.,et al."Improving the dynamics of Northern Hemisphere high-latitude vegetation in the ORCHIDEE ecosystem model".GEOSCIENTIFIC MODEL DEVELOPMENT (2015).