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Marine stratocumulus aerosol-cloud relationships in the MASE-II experiment: Precipitation susceptibility in eastern Pacific marine stratocumulus

Lu, Miao-Ling and Sorooshian, Armin and Jonsson, Haflidi H. and Feingold, Graham and Flagan, Richard C. and Seinfeld, John H. (2009) Marine stratocumulus aerosol-cloud relationships in the MASE-II experiment: Precipitation susceptibility in eastern Pacific marine stratocumulus. Journal of Geophysical Research D, 114 (24). Art. No. D24203. ISSN 0148-0227. doi:10.1029/2009JD012774. https://resolver.caltech.edu/CaltechAUTHORS:20100119-103146516

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Abstract

Observational data on aerosol-cloud-drizzle relationships in marine stratocumulus are presented from the second Marine Stratus/Stratocumulus Experiment (MASE-II) carried out in July 2007 over the eastern Pacific near Monterey, California. Observations, carried out in regions of essentially uniform meteorology with localized aerosol enhancements due to ship exhaust (“ship tracks”), demonstrate, in accord with those from numerous other field campaigns, that increased cloud drop number concentration Nc and decreased cloud top effective radius r_e are associated with increased subcloud aerosol concentration. Modulation of drizzle by variations in aerosol levels is levels is clearly evident. Variations of cloud base drizzle rate R_(cb) are found to be consistent with the proportionality, R_(cb) / H^3/N_c, where H is cloud depth. Simultaneous aircraft and A-Train satellite observations are used to quantify the precipitation susceptibility of clouds to aerosol perturbations in the eastern Pacific region.


Item Type:Article
Related URLs:
URLURL TypeDescription
http://dx.doi.org/10.1029/2009JD012774DOIArticle
ORCID:
AuthorORCID
Sorooshian, Armin0000-0002-2243-2264
Jonsson, Haflidi H.0000-0003-3043-1074
Flagan, Richard C.0000-0001-5690-770X
Seinfeld, John H.0000-0003-1344-4068
Additional Information:© 2009 by the American Geophysical Union. Received 1 July 2009; revised 21 September 2009; accepted 28 September 2009; published 22 December 2009. This work was supported by the Office of Naval Research grant N00014-04-1-0018. A.S. acknowledges support from the Cooperative Institute for Research in the Atmosphere Postdoctoral Research Program. G.F. acknowledges NOAA’s Climate Goal. The authors acknowledge Robert Wood for helpful comments.
Funders:
Funding AgencyGrant Number
Office of Naval Research (ONR)N00014-04-1-0018
Subject Keywords:Clouds
Issue or Number:24
DOI:10.1029/2009JD012774
Record Number:CaltechAUTHORS:20100119-103146516
Persistent URL:https://resolver.caltech.edu/CaltechAUTHORS:20100119-103146516
Official Citation:Lu, M.-L., A. Sorooshian, H. H. Jonsson, G. Feingold, R. C. Flagan, and J. H. Seinfeld (2009), Marine stratocumulus aerosol-cloud relationships in the MASE-II experiment: Precipitation susceptibility in eastern Pacific marine stratocumulus, J. Geophys. Res., 114, D24203, doi:10.1029/2009JD012774.
Usage Policy:No commercial reproduction, distribution, display or performance rights in this work are provided.
ID Code:17208
Collection:CaltechAUTHORS
Deposited By: Ruth Sustaita
Deposited On:28 Jan 2010 19:52
Last Modified:08 Nov 2021 23:33

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