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Proceedings Paper

Ozone monitoring instrument satellite UV irradiance product correction using a global aerosol climatology
Author(s): Antti Arola; S. Kazadzis; J. Kujanpää; A. Lindfors; A. Bais; A. Webb; P. Weihs; A. di Sarra; T. Koskela; M. Janousch; J. M. Vilaplana; A. M. Sianni; C. Brogniez
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Paper Abstract

Lately a number of studies related with UV irradiance estimates from satellite data based on the Ozone Monitoring Instrument (OMI) have shown a high correlation with ground-based measurements but a positive bias in many locations, the satellite derived UV being higher. One of the key factors that this bias has been attributed to is the boundary layer aerosol absorption not taken into account in the current OMI UV algorithm. In this work we have used a correction procedure based on climatological global aerosol absorption data taken from AeroComm aerosol initiative. This dataset includes aerosol optical depth and aerosol single scattering albedo assembled by combining, ground-based aerosol measurements from AERONET and information from several global aerosol models. The results of this correction were compared with synchronous ground-based measurements from 9 UV monitoring stations. The results generally showed a significantly reduced bias of 7-20%, a lower variability, and an unchanged, high correlation coefficient.

Paper Details

Date Published: 24 August 2009
PDF: 6 pages
Proc. SPIE 7462, Ultraviolet and Visible Ground- and Space-based Measurements, Trace Gases, Aerosols and Effects VI, 74620D (24 August 2009); doi: 10.1117/12.825600
Show Author Affiliations
Antti Arola, Finnish Meteorological Institute (Finland)
S. Kazadzis, Finnish Meteorological Institute (Finland)
National Observatory of Athens (Greece)
J. Kujanpää, Finnish Meteorological Institute (Finland)
A. Lindfors, Finnish Meteorological Institute (Finland)
A. Bais, Aristotle Univ. of Thessaloniki (Greece)
A. Webb, Univ. of Manchester (United Kingdom)
P. Weihs, Institute of Meteorology (Austria)
A. di Sarra, ENEA-Climate Lab. (Italy)
T. Koskela, Finnish Meteorological Institute (Finland)
M. Janousch, CHI (Czech Republic)
J. M. Vilaplana, INTA, Mazagon (Spain)
A. M. Sianni, Sapienza Univ. of Rome (Italy)
C. Brogniez, LOA-Univ. des Sciences et Technologies de Lille (France)

Published in SPIE Proceedings Vol. 7462:
Ultraviolet and Visible Ground- and Space-based Measurements, Trace Gases, Aerosols and Effects VI
Jay R. Herman; Wei Gao, Editor(s)

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