Sensitivity study of the spectral dispersion of the cloud droplet size distribution on the indirect aerosol effect
Citations Over TimeTop 10% of 2003 papers
Abstract
To study the influence of anthropogenic aerosols on the shape of the cloud droplet size spectra (dispersion effect), we analyze observed liquid water cloud data during two Canadian field studies. Scaled by the parameter β, which is a function of the relative dispersion of cloud droplet spectra, the calculated cloud albedo shows better agreement with the independently measured cloud albedo than the cloud albedo calculated without scaling. The scaling factor β is positively correlated with the cloud droplet number concentration. A linear relationship between β and the cloud droplet number concentration obtained from different field studies is applied to the ECHAM4 general circulation model. The global mean indirect aerosol effect at the top of atmosphere including the dispersion effect is reduced by 0.2 W m −2 as compared to the reference simulation. This accounts for about 1/3 of the reduction that needed to be imposed on the simulated anthropogenic indirect aerosol effect by Lohmann and Lesins [2002] .
Related Papers
- → Cloudiness as a Global Climatic Feedback Mechanism: The Effects on the Radiation Balance and Surface Temperature of Variations in Cloudiness(1972)315 cited
- → Impact of aerosol particles on cloud formation: Aircraft measurements in China(2010)113 cited
- → An analysis of short‐term albedo variations at haut glacier d'arolla, switzerland(2004)22 cited
- From Regional Cloud-Albedo to a Global Albedo Footprint - Studying Aerosol Effects on the Radiation Budget Using the Relation Between Albedo and Cloud Fraction(2015)
- Factors influencing the mesoscale variations in marine stratocumulus albedo(2007)