Validating surface downwelling solar irradiances estimated by the McClear model under cloud-free skies in the United Arab Emirates

Yehia Eissa 1, 2 Saima Munawwar 2 Armel Oumbe 3 Philippe Blanc 1 Hosni Ghedira 2 Lucien Wald 1 Hélène Bru 3 Dominique Goffe 4
1 O.I.E. - Centre Observation, Impacts, Énergie
2 Masdar Institute of Science and Technology [Abu Dhabi]
3 Total New Energies
4 Bertin Technologies - Bertin Technologies
Abstract : McClear, a fast model based on a radiative transfer solver, exploits the atmospheric properties provided by the EU-funded MACC project (Monitoring Atmospheric Composition and Climate) to estimate the surface downwelling solar irradiances for cloud-free instances. This article presents the first validation of the McClear model for the specific climate of the United Arab Emirates where skies are frequently cloud-free but turbid. McClear accurately estimates the global horizontal irradiance measured every 10 min at seven sites. The bias ranges from -9 W m-2 (-1% of the mean observed irradiance) to +35 W m-2 (+6%). The root mean square error (RMSE) ranges from 22 W m-2 (4%) to 47 W m-2 (8%) and the coefficient of determination ranges from 0.980 to 0.990. Estimates of the direct irradiance at normal incidence exhibit an underestimation that is attributed to the overestimation of the aerosol optical depth in the MACC data set and not accounting for the circumsolar radiation in McClear. The corresponding bias ranges from -57 W m-2 (-8%) to +6 W m-2 (+1%). The RMSE ranges from 62 W m-2 (9%) to 87 W m-2 (13%) and the coefficient of determination ranges from 0.830 to 0.863. When compared to two other models in the literature, McClear is better able to capture the temporal variability of the direct irradiance at normal incidence. The validation results remain comparable for the global horizontal irradiance.
Keywords : Aerosols Atmosphere MACC Solar radiation
Type de document :
Article dans une revue
Liste complète des métadonnées

Littérature citée [46 références]  Voir  Masquer  Télécharger
https://hal-mines-paristech.archives-ouvertes.fr/hal-01114364
Contributeur : Lucien Wald <>
Soumis le : lundi 9 février 2015 - 11:57:57
Dernière modification le : vendredi 15 février 2019 - 11:54:04
Document(s) archivé(s) le : dimanche 16 avril 2017 - 08:24:32

Fichier

2015_solar_energy_eissa_mcclea...
Publication financée par une institution

Identifiants

Collections

ENSMP | INSTITUT-TELECOM | OIE | PSL | PARISTECH

Citation

Yehia Eissa, Saima Munawwar, Armel Oumbe, Philippe Blanc, Hosni Ghedira, et al.. Validating surface downwelling solar irradiances estimated by the McClear model under cloud-free skies in the United Arab Emirates. Solar Energy, Elsevier, 2015, 114, pp.17-31. ⟨10.1016/j.solener.2015.01.017⟩. ⟨hal-01114364⟩

Exporter

BibTeX TEI DC DCterms EndNote

Partager

Métriques

Consultations de la notice

576

Téléchargements de fichiers

466

Contact

support.ccsd.cnrs.fr
hal.support@ccsd.cnrs.fr
Logo CCSD