Intercomparison of aerosol optical depth from Brewer ozone spectrophotometers and CIMEL sunphotometers measurements

A. Cheymol (1) , L. Gonzalez Sotelino (1) , K. S. Lam (2) , J. Kim (3) , V. Fioletov (4) , H. de Backer (1) , A. M. Siani (5)

1 IRM - Institut Royal Météorologique de Belgique [Bruxelles] - Royal Meteorological Institute of Belgium
2 POLYU - The Hong Kong Polytechnic University [Hong Kong]
3 Yonsei Univ.
4 ECCC - Environment and Climate Change Canada
5 Dipartimento di Fisica [Roma La Sapienza]

The Langley plot method applied on the Brewer Ozone measurements can provide accurate Aerosol Optical Depth (AOD) in the UV-B. We present seven intercomparisons between AOD retrieved from Brewer Ozone measurements and AOD measured by CIMEL sunphotometer, which are stored in the international AERONET database. Only the intercomparisons between co-located instruments can be used to validate the Langley Plot method applied to the Brewer measurements: in this case, all the correlation coefficient are above 0.83. If the instruments are not at the same site, the correlation between the AOD retrieved by both instruments is much lower.

Domaines: Océan, Atmosphère

A. Cheymol, L. Gonzalez Sotelino, K. S. Lam, J. Kim, V. Fioletov, et al.. Intercomparison of aerosol optical depth from Brewer ozone spectrophotometers and CIMEL sunphotometers measurements. Atmospheric Chemistry and Physics Discussions, 2008, 8 (3), pp.11997-12022. ⟨hal-00304271⟩