Meteorological and aerosol effects on marine cloud microphysical properties

K. J. Sanchez, L. M. Russell, R. L. Modini, A. A. Frossard, L. Ahlm, C. E. Corrigan, G. C. Roberts, L. N. Hawkins, J. C. Schroder, A. K. Bertram, R. Zhao, A. K Y Lee, J. J. Lin, A. Nenes, Z. Wang, A. Wonaschütz, Armin Sorooshian, K. J. Noone, H. Jonsson, D. ToomA. M. Macdonald, W. R. Leaitch, J. H. Seinfeld

Research output: Contribution to journalArticle

14 Scopus citations

Abstract

Meteorology and microphysics affect cloud formation, cloud droplet distributions, and shortwave reflectance. The Eastern Pacific Emitted Aerosol Cloud Experiment and the Stratocumulus Observations of Los-Angeles Emissions Derived Aerosol-Droplets studies provided measurements in six case studies of cloud thermodynamic properties, initial particle number distribution and composition, and cloud drop distribution. In this study, we use simulations from a chemical and microphysical aerosol-cloud parcel (ACP) model with explicit kinetic drop activation to reproduce observed cloud droplet distributions of the case studies. Four cases had subadiabatic lapse rates, resulting in fewer activated droplets, lower liquid water content, and higher cloud base height than an adiabatic lapse rate. A weighted ensemble of simulations that reflect measured variation in updraft velocity and cloud base height was used to reproduce observed droplet distributions. Simulations show that organic hygroscopicity in internally mixed cases causes small effects on cloud reflectivity (CR) (

Original languageEnglish (US)
Pages (from-to)4142-4161
Number of pages20
JournalJournal of Geophysical Research: Space Physics
Volume121
Issue number8
DOIs
StatePublished - Apr 27 2016

Keywords

  • aerosol
  • cloud reflectivity
  • hygroscopicity
  • lapse rate
  • spectral width

ASJC Scopus subject areas

  • Atmospheric Science
  • Geophysics
  • Earth and Planetary Sciences (miscellaneous)
  • Space and Planetary Science

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    Sanchez, K. J., Russell, L. M., Modini, R. L., Frossard, A. A., Ahlm, L., Corrigan, C. E., Roberts, G. C., Hawkins, L. N., Schroder, J. C., Bertram, A. K., Zhao, R., Lee, A. K. Y., Lin, J. J., Nenes, A., Wang, Z., Wonaschütz, A., Sorooshian, A., Noone, K. J., Jonsson, H., ... Seinfeld, J. H. (2016). Meteorological and aerosol effects on marine cloud microphysical properties. Journal of Geophysical Research: Space Physics, 121(8), 4142-4161. https://doi.org/10.1002/2015JD024595