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Solar irradiance in clear atmospheres: study of parameterisations of change with altitude

Oumbe, Armel and Blanc, P. and Gschwind, B. and Lefevre, M. and Qu, Z. and Schroedter-Homscheidt, Marion and Wald, L. (2011) Solar irradiance in clear atmospheres: study of parameterisations of change with altitude. Advances in Science and Research, 6, pp. 199-203. Copernicus Publications. DOI: 10.5194/asr-6-199-2011. ISSN 1992-0628.

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Parameterisation of changes of the solar irradiance at ground level with a specific variable (e.g. solar zenithal angle, aerosol optical depth, altitude, etc.) is often used in operational processes because it saves computational time. This paper deals with the modelling of the vertical profile of downwelling solar irradiance for the first two kilometres above ground in clear sky conditions. Two analytical parameterisations are evaluated for direct and global irradiance in spectral bands as well as for the total irradiance. These parameterisations reproduce the vertical profile with good accuracy for global spectral irradiance and are less accurate for direct component, especially in turbid atmosphere. A piecewise linear interpolation technique using irradiance values known at surface and 4 altitudes every 500m performs better in any case.

Document Type:Article
Title:Solar irradiance in clear atmospheres: study of parameterisations of change with altitude
AuthorsInstitution or Email of Authors
Oumbe, Armelarmel.oumbe@dlr.de
Blanc, P.Mines ParisTech
Gschwind, B.Mines ParisTech
Lefevre, M. Mines ParisTech
Qu, Z.Mines ParisTech
Schroedter-Homscheidt, Marionmarion.schroedter-homscheidt@dlr.de
Wald, L.Mines ParisTech
Journal or Publication Title:Advances in Science and Research
Refereed publication:Yes
In Open Access:Yes
In ISI Web of Science:No
Page Range:pp. 199-203
Publisher:Copernicus Publications
Keywords:solar irradiance, clear-sky, altitude, parameterisation
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 Atmosphären- und Klimaforschung
Location: Oberpfaffenhofen
Institutes and Institutions:German Remote Sensing Data Center > Atmosphere
Deposited By: Marion Schroedter-Homscheidt
Deposited On:24 Jan 2012 12:45
Last Modified:22 Apr 2013 08:57

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