On the Proper Use of Satellite-Derived Leaf Area Index in Climate ModelingSource: Journal of Climate:;2009:;volume( 022 ):;issue: 016::page 4427Author:Ge, Jianjun
DOI: 10.1175/2009JCLI2868.1Publisher: American Meteorological Society
Abstract: Satellite-observed leaf area index (LAI) is increasingly being used in climate modeling. In common land surface models, LAI is specified for the vegetated part only. In contrast, satellite LAI is defined for the total area including both vegetated and nonvegetated fractions. Some recent modeling studies and model developments have not noticed this difference, which resulted in improper use of satellite LAI. This paper clarified this issue. A sensitivity test was carried out using a regional model to investigate the impacts of LAI definitions on simulated climates. This study showed that use of satellite LAI without considering the inconsistency in definition caused much smaller LAI values in the model. As a result, partitioning of surface energy into latent and sensible heat fluxes, as well as the model-simulated precipitation, was affected substantially. Overall, improper use of satellite LAI increased the model biases in simulated precipitation.
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contributor author | Ge, Jianjun | |
date accessioned | 2017-06-09T16:29:19Z | |
date available | 2017-06-09T16:29:19Z | |
date copyright | 2009/08/01 | |
date issued | 2009 | |
identifier issn | 0894-8755 | |
identifier other | ams-68771.pdf | |
identifier uri | http://onlinelibrary.yabesh.ir/handle/yetl/4210365 | |
description abstract | Satellite-observed leaf area index (LAI) is increasingly being used in climate modeling. In common land surface models, LAI is specified for the vegetated part only. In contrast, satellite LAI is defined for the total area including both vegetated and nonvegetated fractions. Some recent modeling studies and model developments have not noticed this difference, which resulted in improper use of satellite LAI. This paper clarified this issue. A sensitivity test was carried out using a regional model to investigate the impacts of LAI definitions on simulated climates. This study showed that use of satellite LAI without considering the inconsistency in definition caused much smaller LAI values in the model. As a result, partitioning of surface energy into latent and sensible heat fluxes, as well as the model-simulated precipitation, was affected substantially. Overall, improper use of satellite LAI increased the model biases in simulated precipitation. | |
publisher | American Meteorological Society | |
title | On the Proper Use of Satellite-Derived Leaf Area Index in Climate Modeling | |
type | Journal Paper | |
journal volume | 22 | |
journal issue | 16 | |
journal title | Journal of Climate | |
identifier doi | 10.1175/2009JCLI2868.1 | |
journal fristpage | 4427 | |
journal lastpage | 4433 | |
tree | Journal of Climate:;2009:;volume( 022 ):;issue: 016 | |
contenttype | Fulltext |