HR: 1340h
AN: A53A-0140    [Abstracts]
TI: Combined Observational and Modeling Based Study of the Aerosol Indirect Effect
AU: * Storelvmo, T
EM: truds@geo.uio.no
AF: Department of Geosciences, University of Oslo, P.O.Box 1022 Blindern, Oslo, 0315 Norway
AU: Kristjansson, J E
EM: j.e.kristjansson@geo.uio.no
AF: Department of Geosciences, University of Oslo, P.O.Box 1022 Blindern, Oslo, 0315 Norway
AU: Stordal, F
EM: frode.stordal@geo.uio.no
AF: Department of Geosciences, University of Oslo, P.O.Box 1022 Blindern, Oslo, 0315 Norway
AU: Myhre, G
EM: gunnar.myhre@geo.uio.no
AF: Department of Geosciences, University of Oslo, P.O.Box 1022 Blindern, Oslo, 0315 Norway
AU: Johnsrud, M
EM: mona.johnsrud@nilu.no
AF: Norwegian Institute of Air Research, P.O.Box 100, Kjeller, 2027 Norway
AB: The indirect effect of aerosols on liquid clouds is investigated by comparing aerosol and cloud characteristics from the Global Climate Model CAM-Oslo to those observed by the MODIS (Moderate Resolution Imaging Spectroradiometer) instrument on board the TERRA and AQUA satellites. The comparison is carried out for fifteen selected regions ranging from clean and remote to polluted and densely populated. For each region, the slope and correlation coefficient for the following parameters are calculated: Aersosol Optical Depth vs Liquid Cloud Optical Thickness, Aerosol Optical Depth vs Liquid Cloud Effective Radius and Aerosol Optical Depth vs Cloud Liquid Water Path. Modeled and observed correlation coefficients and slopes are hereafter compared for a 5-year perion starting January 2000. Additionally, modeled and observed global maps for a number of aerosol and cloud parameters crucial for the understanding of the aerosol indirect effect are compared for the same period of time.
DE: 0305 Aerosols and particles (0345, 4801, 4906)
DE: 0320 Cloud physics and chemistry
DE: 0321 Cloud/radiation interaction
SC: Atmospheric Sciences [A]
MN: Fall Meeting 2005