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Evapotranspiration Modelling at Large Scale Using Near-real Time Msg Seviri Derived Data : Volume 7, Issue 5 (20/09/2010)

By Ghilain, N.

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Book Id: WPLBN0004012675
Format Type: PDF Article :
File Size: Pages 42
Reproduction Date: 2015

Title: Evapotranspiration Modelling at Large Scale Using Near-real Time Msg Seviri Derived Data : Volume 7, Issue 5 (20/09/2010)  
Author: Ghilain, N.
Volume: Vol. 7, Issue 5
Language: English
Subject: Science, Hydrology, Earth
Collections: Periodicals: Journal and Magazine Collection, Copernicus GmbH
Historic
Publication Date:
2010
Publisher: Copernicus Gmbh, Göttingen, Germany
Member Page: Copernicus Publications

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Arboleda, A., Gellens-Meulenberghs, F., & Ghilain, N. (2010). Evapotranspiration Modelling at Large Scale Using Near-real Time Msg Seviri Derived Data : Volume 7, Issue 5 (20/09/2010). Retrieved from http://www.ebooklibrary.org/


Description
Description: Royal Meteorological Institute, Brussels, Belgium. We present an evapotranspiration (ET) model developed in the framework of the EUMETSAT Satellite Application Facility (SAF) on Land Surface Analysis (LSA). The model is a simplified Soil-Vegetation-Atmosphere Transfer (SVAT) scheme that uses as input a combination of remote sensed data and atmospheric model outputs. The inputs based on remote sensing are LSA-SAF products: the Albedo (AL), the Downwelling Surface Shortwave Flux (DSSF) and the Downwelling Surface Longwave Flux (DSLF). They are available with the spatial resolution of the MSG SEVIRI instrument. ET maps covering the whole MSG field of view are produced by the model every 30 min, in near-real-time, for all weather conditions. This paper presents the adopted methodology and a set of validation results. The model quality is evaluated in two ways. First, ET results are compared with ground observations (from CarboEurope and national weather services), for different land cover types, over a full vegetation cycle in the Northern Hemisphere in 2007. This validation shows that the model is able to reproduce the observed ET temporal evolution from the diurnal to annual time scales for the temperate climate zones: the mean bias is less than 0.02 mm h−1 and the root-mean square error is between 0.06 and 0.10 mm h−1. Then, ET model outputs are compared with those from the European Centre for Medium-Range Weather Forecasts (ECMWF) and the Global Land Data Assimilation System (GLDAS). From this comparison, a high spatial correlation is noted, between 80 to 90%, around midday time frame. Nevertheless, some discrepancies are also observed and are due to the different input variables and parameterisations used.

Summary
Evapotranspiration modelling at large scale using near-real time MSG SEVIRI derived data

Excerpt
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