%0 Journal Article
%T One year measurements of aerosol optical properties over an urban coastal site: Effect on local direct radiative forcing
%+ Laboratoire de sondages électromagnétiques de l'environnement terrestre (LSEET)
%+ Laboratoire d'aérologie (LAERO)
%+ Laboratoire de météorologie physique (LaMP)
%+ Laboratoire d’Océanologie et de Géosciences (LOG) - UMR 8187 (LOG)
%A Saha, Auromeet
%A Mallet, Marc
%A Roger, Jean-Claude
%A Dubuisson, Philippe
%A Piazzola, Jacques
%A Despiau, Serge
%< avec comité de lecture
%@ 0169-8095
%J Atmospheric Research
%I Elsevier
%V 90
%N 2-4
%P 195-202
%8 2008
%D 2008
%R 10.1016/j.atmosres.2008.02.003
%K Aerosol optical depth
%K Single scattering albedo
%K Atmospheric absorption
%K Direct radiative forcing
%K Mediterranean coastal zone
%Z Physics [physics]/Physics [physics]/Atmospheric and Oceanic Physics [physics.ao-ph]Journal articles
%X We present results of direct aerosol radiative forcing over a French Mediterranean coastal zone based on one year of continuous observations of aerosol optical properties during 2005–2006. Monthly-mean aerosol optical depth at 440 nm ranged between 0.1 and 0.34, with high Angstrom coefficient (α > 1.2). The single scattering albedo (at 525 nm) estimated at the surface ranged between 0.7 and 0.8, indicating significant absorption. The presence of aerosols over the Mediterranean zone during summer decreases the shortwave radiation reaching the surface by as much as 26 ± 3.9 W m−2, and increases the top of the atmosphere reflected radiation by as much as 5.2 ± 1.0 W m−2. The shortwave atmospheric absorption translates to an atmospheric heating of 2.5 to 4.6 K day−1. Concerted efforts are needed for investigating the possible impact of the increase in heating rate on the maintenance of heat-waves frequently occurring over this coastal region during summer time.
%G English
%2 https://hal.science/hal-00519496/document
%2 https://hal.science/hal-00519496/file/Saha2008.pdf
%L hal-00519496
%U https://hal.science/hal-00519496
%~ IRD
%~ INSU
%~ METEO
%~ UNIV-TLSE3
%~ UNIV-TLN
%~ PRES_CLERMONT
%~ CNRS
%~ UNIV-BPCLERMONT
%~ UNIV-LITTORAL
%~ CNES
%~ OMP
%~ LAMP
%~ LSEET
%~ ACL-SF
%~ UNIV-LILLE
%~ LOG
%~ UNIV-UT3
%~ UT3-INP
%~ UT3-TOULOUSEINP
%~ TEST3-HALCNRS
%~ OMP-LAERO