Abstract
Two parameterizations of cloud droplet spectral dispersion and their impact on the indirect aerosol effect are compared in a global climate model. The earlier scheme specifies β, the ratio of droplet effective radius to volume‐mean radius, in terms of N, the cloud droplet number concentration. The new scheme specifies β in terms of mean droplet mass (L/N), where L is liquid water content, to account for the effect of variations in L. For low to moderate N, the new scheme gives a stronger increase of β with increasing N than the old scheme. In a present‐climate simulation, the new scheme shows a stronger gradient between remote regions (small β) and polluted/continental regions (large β). The new scheme also offsets the first indirect aerosol forcing (ΔF) more strongly: ΔF = −0.65 W m−2 with constant β, −0.43 W m−2 with the old β, and −0.38 W m−2 with the new β.
Talk to us
Join us for a 30 min session where you can share your feedback and ask us any queries you have
Schedule a callDisclaimer: All third-party content on this website/platform is and will remain the property of their respective owners and is provided on "as is" basis without any warranties, express or implied. Use of third-party content does not indicate any affiliation, sponsorship with or endorsement by them. Any references to third-party content is to identify the corresponding services and shall be considered fair use under The CopyrightLaw.
