CiteSeerX — Search Results — aerosol indirect effect

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Running Title: Aerosol Indirect Effect over Europe

by Christian Ruckstuhl, Joel R. Norris, Rolf Philipona

"... Aerosol indirect effects are some of the largest uncertainties of anthropogenic climate change. To estimate the first aerosol indirect radiative effect (or cloud albedo effect), we analyzed global solar irradiance measurements under completely overcast skies during the recent period of aerosol optic ..."

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Aerosol indirect effects are some of the largest uncertainties of anthropogenic climate change. To estimate the first aerosol indirect radiative effect (or cloud albedo effect), we analyzed global solar irradiance measurements under completely overcast skies during the recent period of aerosol

Constraining cloud droplet number concentration in GCMs suppresses the aerosol indirect effect

by unknown authors

"... [1] Global aerosol-climate models with prognostic treatment of cloud droplet number concentration (CDNC) often prescribe lower bounds for CDNC or aerosol concentrations. Here we demonstrate that this possibly unphysical constraint reduces the simulated aerosol indirect effect by up to 80%, caused by ..."

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[1] Global aerosol-climate models with prognostic treatment of cloud droplet number concentration (CDNC) often prescribe lower bounds for CDNC or aerosol concentrations. Here we demonstrate that this possibly unphysical constraint reduces the simulated aerosol indirect effect by up to 80%, caused

Bréon: Aerosol indirect effects in POLDER satellite data and

by J. Quaas, O. Boucher, F. -m. Bréon - in the LMDZ GCM

"... Dynamique–Zoom (LMDZ) general circulation model ..."

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Dynamique–Zoom (LMDZ) general circulation model

THE EFFECT OF CLOUD TOP ENTRAINMENT ON THE AEROSOL INDIRECT EFFECT

by U. Lohmann

"... Entrainment in stratocumulus-topped planetary boundary layers is one of the most challenging problems in boundary layer research. Not only is there a limited understanding in the physical processes that control entrainment, but their parameterization in GCMs has been difficult or non-existent. A re ..."

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. Firstly, the ECHAM version used here has been extended to include aerosol effects. Secondly, an explicit entrainment parameterization at the top of the boundary layer will be introduced to both the SCM and the full GCM.

Modeling of aerosol indirect effects with WRF/Chem over Europe

by Paolo Tuccella, Gabriele Curci, Suzanne Crumeyrolle, Guido

"... Astract WRF/Chem has been updated in order to simulate the aerosol indirect ef-fects using a new parameterization for production of secondary organic aerosol. The model has been evaluated over North Sea among the ATR-42 aircraft meas-urements of aerosol and cloud issued in frame European Integrated ..."

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Astract WRF/Chem has been updated in order to simulate the aerosol indirect ef-fects using a new parameterization for production of secondary organic aerosol. The model has been evaluated over North Sea among the ATR-42 aircraft meas-urements of aerosol and cloud issued in frame European Integrated

Observed impacts of vertical velocity on cloud microphysics and implications for aerosol indirect effects

by Chunsong Lu , Yangang Liu , Shengjie Niu , Andrew M Vogelmann

"... [1] The simultaneous measurements of vertical velocity and cloud droplet size distributions in cumuli collected during the RACORO field campaign over the Atmospheric Radiation Measurement Program's Southern Great Plains site near Lamont, Oklahoma, US, are analyzed to determine the effects of v ..."

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by analyzing the data of vertical velocity directly. The effects of vertical velocity on relative dispersion and its relationship with droplet number concentration are opposite to that associated with aerosol loading, posing a confounding challenge for separating aerosol indirect effects from dynamical effects