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Comparison of total water vapor column from GOME-2 on MetOp-A against ground-based GPS measurements at the Iberian Peninsula

Román, R. and Antón, M. and Cachorro, V.E. and Loyola, Diego and Ortiz de Galisteo, J.P. and de Frutos, A. and Romero-Campos, P.M. (2015) Comparison of total water vapor column from GOME-2 on MetOp-A against ground-based GPS measurements at the Iberian Peninsula. Science of the Total Environment, 533, pp. 317-328. Elsevier. DOI: 10.1016/j.scitotenv.2015.06.124 ISSN 0048-9697

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Official URL: http://dx.doi.org/10.1016/j.scitotenv.2015.06.124

Abstract

Water vapor column (WVC) obtained by GOME-2 instrument (GDP-4.6 version) onboard MetOp-A satellite platform is compared against referenceWVC values derived from GPS (Global Positioning System) instruments from 2007 to 2012 at 21 places located at Iberian Peninsula. The accuracy and precision of GOME-2 to estimate the WVC is studied for different Iberian Peninsula zones using the mean (MBE) and the standard deviation (SD) of the GOME-2 and GPS differences. A direct comparison of all available data shows an overestimation of GOME-2 compared to GPS with a MBE of 0.7 mm (10%) and a precision quantified by a SD equals to 4.4 mm (31%). South-Western zone presents the highest overestimation with aMBE of 1.9mm(17%),while Continental zone shows the lowest SD absolute value (3.3mm) due mainly to the lowWVC values reached at this zone. The influence of solar zenith angle (SZA), cloud fraction (CF), and the type of surface and its albedo on the differences between GOME-2 and GPS is analyzed in detail. MBE and SD increase when SZA increases, but MBE decreases (taking negative values) when CF increases and SD shows no significant dependence on CF. Under cloud-free conditions, the differences between WVC from GOME-2 and GPS are within the WVC error given by GOME-2.

Item URL in elib:https://elib.dlr.de/100687/
Document Type:Article
Title:Comparison of total water vapor column from GOME-2 on MetOp-A against ground-based GPS measurements at the Iberian Peninsula
Authors:
AuthorsInstitution or Email of AuthorsAuthors ORCID iD
Román, R.Universidad de Valladolid, SpainUNSPECIFIED
Antón, M.Universidad de Extremadura, SpainUNSPECIFIED
Cachorro, V.E.Universidad de Valladolid, SpainUNSPECIFIED
Loyola, DiegoDLR-IMFUNSPECIFIED
Ortiz de Galisteo, J.P.Universidad de Valladolid, SpainUNSPECIFIED
de Frutos, A.Universidad de Valladolid, SpainUNSPECIFIED
Romero-Campos, P.M.Meteorological State Agency (AEMET), SpainUNSPECIFIED
Date:2015
Journal or Publication Title:Science of the Total Environment
Refereed publication:Yes
Open Access:Yes
Gold Open Access:No
In SCOPUS:Yes
In ISI Web of Science:Yes
Volume:533
DOI :10.1016/j.scitotenv.2015.06.124
Page Range:pp. 317-328
Publisher:Elsevier
ISSN:0048-9697
Status:Published
Keywords:Water vapor column, GOME-2, GPS, Satellite remote sensing
HGF - Research field:Aeronautics, Space and Transport
HGF - Program:Space
HGF - Program Themes:Earth Observation
DLR - Research area:Raumfahrt
DLR - Program:R EO - Erdbeobachtung
DLR - Research theme (Project):R - Vorhaben Ozon-SAF (old)
Location: Oberpfaffenhofen
Institutes and Institutions:Remote Sensing Technology Institute > Atmospheric Processors
Deposited By: Loyola, Dr.-Ing. Diego
Deposited On:09 Dec 2015 08:34
Last Modified:06 Sep 2019 15:19

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