Document Type
Article
Publication Date
6-7-2016
Abstract
In Part I of this work a 3‐D cloud tracking algorithm and phase space of center of gravity altitude versus cloud liquid water mass (CvM space) were introduced and described in detail. We showed how new physical insight can be gained by following cloud trajectories in the CvM space. Here this approach is used to investigate aerosol effects on cloud fields of warm cumuli. We show a clear effect of the aerosol loading on the shape and size of CvM clusters. We also find fundamental differences in the CvM space between simulations using bin versus bulk microphysical schemes, with the bin scheme precipitation expressing much higher sensitivity to changes in aerosol concentrations. Using the bin microphysical scheme, we find that the increase in cloud center of gravity altitude with increase in aerosol concentrations occurs for a wide range of cloud sizes. This is attributed to reduced sedimentation, increased buoyancy and vertical velocities, and increased environmental instability, all of which are tightly coupled to inhibition of precipitation processes and subsequent feedbacks of clouds on their environment. Many of the physical processes shown here are consistent with processes typically associated with cloud invigoration.
Publication Title
Journal of Geophysical Research: Atmospheres
Recommended Citation
Heiblum, R. H.,
Altaratz, O.,
Koren, I.,
Feingold, G.,
Kostinski, A.,
Khain, A.,
Ovchinnikov, M. S.,
Dagan, G.,
Pinto, L.,
Yaish, R.,
&
Chen, Q.
(2016).
Characterization of cumulus cloud fields using trajectories in the center of gravity versus water mass phase space: 2. Aerosol effects on warm convective clouds.
Journal of Geophysical Research: Atmospheres,
121(11), 6356-6373.
http://doi.org/10.1002/2015JD024193
Retrieved from: https://digitalcommons.mtu.edu/physics-fp/169
Version
Publisher's PDF
Publisher's Statement
©2016. American Geophysical Union. All Rights Reserved. Article deposited here in compliance with publisher policies. Publisher's version of record: https://doi.org/10.1002/2015JD024193