Arid
DOI10.1007/s00382-015-2596-z
On the development of a coupled regional climate-vegetation model RCM-CLM-CN-DV and its validation in Tropical Africa
Wang, Guiling1; Yu, Miao1; Pal, Jeremy S.2; Mei, Rui4; Bonan, Gordon B.3; Levis, Samuel3; Thornton, Peter E.4
通讯作者Wang, Guiling
来源期刊CLIMATE DYNAMICS
ISSN0930-7575
EISSN1432-0894
出版年2016
卷号46期号:1-2页码:515-539
英文摘要

This paper presents a regional climate system model RCM-CLM-CN-DV and its validation over Tropical Africa. The model development involves the initial coupling between the ICTP regional climate model RegCM4.3.4 (RCM) and the Community Land Model version 4 (CLM4) including models of carbon-nitrogen dynamics (CN) and vegetation dynamics (DV), and further improvements of the models. Model improvements derive from the new parameterization from CLM4.5 that addresses the well documented overestimation of gross primary production (GPP), a refinement of stress deciduous phenology scheme in CN that addresses a spurious LAI fluctuation for drought-deciduous plants, and the incorporation of a survival rule into the DV model to prevent tropical broadleaf evergreens trees from growing in areas with a prolonged drought season. The impact of the modifications on model results is documented based on numerical experiments using various subcomponents of the model. The performance of the coupled model is then validated against observational data based on three configurations with increasing capacity: RCM-CLM with prescribed leaf area index and fractional coverage of different plant functional types (PFTs); RCM-CLM-CN with prescribed PFTs coverage but prognostic plant phenology; RCM-CLM-CN-DV in which both the plant phenology and PFTs coverage are simulated by the model. Results from these three models are compared against the FLUXNET up-scaled GPP and ET data, LAI and PFT coverages from remote sensing data including MODIS and GIMMS, University of Delaware precipitation and temperature data, and surface radiation data from MVIRI and SRB. Our results indicate that the models perform well in reproducing the physical climate and surface radiative budgets in the domain of interest. However, PFTs coverage is significantly underestimated by the model over arid and semi-arid regions of Tropical Africa, caused by an underestimation of LAI in these regions by the CN model that gets exacerbated through vegetation dynamics in RCM-CLM-CN-DV.


英文关键词Regional climate modeling Biogeochemical cycles Plant phenology Vegetation dynamics Biosphere-atmosphere interactions
类型Article
语种英语
国家USA
收录类别SCI-E
WOS记录号WOS:000370040100033
WOS关键词CARBON-CYCLE FEEDBACKS ; DYNAMIC VEGETATION ; GLOBAL VEGETATION ; ECOSYSTEM DYNAMICS ; WEST-AFRICA ; PART I ; LAND ; BIOSPHERE ; VARIABILITY ; SIMULATION
WOS类目Meteorology & Atmospheric Sciences
WOS研究方向Meteorology & Atmospheric Sciences
资源类型期刊论文
条目标识符http://119.78.100.177/qdio/handle/2XILL650/192075
作者单位1.Univ Connecticut, Dept Civil & Environm Engn, Ctr Environm Sci & Engn, Storrs, CT USA;
2.Loyola Marymount Univ, Dept Civil Engn, Los Angeles, CA 90045 USA;
3.Natl Ctr Atmospher Res, Terr Sci Div, POB 3000, Boulder, CO 80307 USA;
4.Oak Ridge Natl Lab, Climate Change Sci Inst, Oak Ridge, TN USA
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Wang, Guiling,Yu, Miao,Pal, Jeremy S.,et al. On the development of a coupled regional climate-vegetation model RCM-CLM-CN-DV and its validation in Tropical Africa[J],2016,46(1-2):515-539.
APA Wang, Guiling.,Yu, Miao.,Pal, Jeremy S..,Mei, Rui.,Bonan, Gordon B..,...&Thornton, Peter E..(2016).On the development of a coupled regional climate-vegetation model RCM-CLM-CN-DV and its validation in Tropical Africa.CLIMATE DYNAMICS,46(1-2),515-539.
MLA Wang, Guiling,et al."On the development of a coupled regional climate-vegetation model RCM-CLM-CN-DV and its validation in Tropical Africa".CLIMATE DYNAMICS 46.1-2(2016):515-539.
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