Ice Initiation by Aerosol Particles : Measured and Predicted Ice Nuclei Concentrations Versus Measured Ice Crystal Concentrations in an Orographic Wave Cloud
The initiation of ice in an isolated orographic wave cloud was compared with expectations based on ice nucleating aerosol concentrations and with predictions from new ice nucleation parameterizations applied in a cloud parcel model. Measurements of ice crystal number concentrations were found to be in good agreement both with measured number concentrations of ice nuclei feeding the clouds and with ice nuclei number concentrations determined from the residual nuclei of cloud particles collected by a counterflow virtual impactor. Using lognormal distributions fitted to measured aerosol size ...
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Eidhammer, T.; DeMott, P. J.; Prenni, A. J.; Petters, M. D.; Twohy, C. H.; Rogers, D. C.; Stith, J.; Heymsfield, A.; Wang, Z.; Pratt, K. A.; Prather, K. A.; Murphy, Shane; Seinfeld, J. H.; Subramanian, R.; Kreidenweis, S. M.
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Aerosols in the Tropical and Subtropical UT/LS : In-Situ Measurements of Submicron Particle Abundance and Volatility Author(s):Borrmann, S.; Kunkel, D.; Weigel, R.; Minikin, A.; Deshler, Terry; Wilson, J. C.; Curtius, J.; Volk, C. M.; Homan, C. D.; Ulanovsky, A.; Ravegnani, F.; Viciani, S.; Shur, G. N.; Belyaev, G. V.; Law, K. S.; Cairo, F.
Date:2010-06-23Processes occurring in the tropical upper troposphere (UT), the Tropical Transition Layer (TTL), and the lower stratosphere (LS) are of importance for the global climate, for stratospheric dynamics and air chemistry, and ...
Impacts of Aerosol Particles on the Microphysical and Radiative Properties of Stratocumulus Clouds Over the Southeast Pacific Ocean Author(s):Twohy, C. H.; Anderson, Jeffrey R.; Toohey, D. W.; Andrejczuk, M.; Adams, A.; Lytle, M.; George, C.; Wood, R.; Saide, P.; Spak, S.; Zuidema, P.; Leon, D.
Date:2013-03-05The southeast Pacific Ocean is covered by the world's largest stratocumulus cloud layer, which has a strong impact on ocean temperatures and climate in the region. The effect of anthropogenic sources of aerosol particles ...
Optical measurements of aerosol size distributions in Great Smoky Mountains National Park: particle hygroscopicity and its impact on visibility Author(s):Kreidenweis, Sonia M.; Ames, Rodger B.
Date:1996-08Aerosol size distributions were measured during the 1995 Southeastern Aerosol and Visibility Study (SEAVS) in Great Smoky Mountains National Park using a PMS ASASP-X optical aerosol spectrometer. Ambient aerosol was ...