气候变化领域集成服务门户(CCPortal): Benefits of representing floodplains in a Land Surface Model: Pantanal simulated with ORCHIDEE CMIP6 version

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DOI	10.1007/s00382-020-05324-0
	Benefits of representing floodplains in a Land Surface Model: Pantanal simulated with ORCHIDEE CMIP6 version
	Schrapffer A.; Sörensson A.; Polcher J.; Fita L.
发表日期	2020
ISSN	0930-7575
起始页码	1303
结束页码	1323
卷号	55
英文摘要	Tropical floodplains have a significant impact on the regional water cycle and on land-atmosphere interaction but are not always considered in Land Surface Models (LSMs) or in Earth system models. This study evaluates the importance of representing tropical floodplains in an LSM to provide realistic river discharges, evapotranspiration fluxes and other variables crucial for land’s interaction with the ocean and atmosphere. Off-line simulations of the world’s largest tropical wetland, the Pantanal are conducted with ORCHIDEE, the LSM of IPSL’s regional and global Earth system model. We analyse the period 1961–2000, which includes both dry and wet decades. Atmospheric uncertainty is considered through the utilization of three forcing data sets, each one in two versions: the original dataset and a regionally bias adjusted version. The activation of the floodplain module leads to a systematic improvement of intra-annual variability and extremes of river discharge. Temporal evolution and spatial distribution of flooded area are coherent with satellite estimations, although the model, due to the coarse resolution of the topography, underestimates the extent of the area. Considering floodplains in ORCHIDEE enhance the evapotranspiration since it permits the water from the upstream region to evaporate in the plains. This have strong consequences on the water balance and on the spatial pattern of surface fluxes. The simulations allow us to perform a model-guided residual estimation of evapotranspiration through a water balance obtaining an annual evapotranspiration over Pantanal of 1220 mm while precipitation is estimated to be 1250 mm with an uncertainty of 180 mm. © 2020, Springer-Verlag GmbH Germany, part of Springer Nature.
英文关键词	Floodplains; Land Surface Models; Land-atmosphere interaction; South America
语种	英语
scopus关键词	CMIP; evapotranspiration; floodplain; hydrological cycle; land surface; land-atmosphere interaction; numerical model; uncertainty analysis; Pantanal
来源期刊	Climate Dynamics
文献类型	期刊论文
条目标识符	http://gcip.llas.ac.cn/handle/2XKMVOVA/145362
作者单位	Facultad de Ciencias Exactas y Naturales, Universidad de Buenos Aires, Buenos Aires, Argentina; Centro de Investigaciones del Mar y la Atmósfera (CIMA), CONICET – Universidad de Buenos Aires, Buenos Aires, Argentina; Instituto Franco-Argentino para el Estudio del Clima y sus Impactos (UMI 3351 IFAECI), CNRS – IRD – CONICET – UBA, Buenos Aires, Argentina; Laboratoire de Météorologie Dynamique (LMD), IPSL, CNRS, École Polytechnique, Palaisseau, France
推荐引用方式 GB/T 7714	Schrapffer A.,Sörensson A.,Polcher J.,et al. Benefits of representing floodplains in a Land Surface Model: Pantanal simulated with ORCHIDEE CMIP6 version[J],2020,55.
APA	Schrapffer A.,Sörensson A.,Polcher J.,&Fita L..(2020).Benefits of representing floodplains in a Land Surface Model: Pantanal simulated with ORCHIDEE CMIP6 version.Climate Dynamics,55.
MLA	Schrapffer A.,et al."Benefits of representing floodplains in a Land Surface Model: Pantanal simulated with ORCHIDEE CMIP6 version".Climate Dynamics 55(2020).