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Sea spray aerosol as a unique source of ice nucleating particles

Cited 148 time in wos
Cited 146 time in scopus
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Sea spray aerosol as a unique source of ice nucleating particles
Grant B. Deane
Matthew J. Ruppel
Ryan C. Sullivan
Douglas B. Collins
Kimberly A. Prather
Christina S. McCluskey
Thomas C. J. Hill
Paul J. DeMott
Myrelis Diaz Martinez
Jessica L. Axson
Andrew P. Ault
Camille M. Sultana
Christopher Lee
Jonathan Abbatt
M. Dale Stokes
Gilmarie Santos-Figueroa
Ingrid Venero
Jeremy Wentzell
Ernie R. Lewis
Suresh Dhaniyala
Gavin R. McMeeking
Jefferson R. Snider
Rhee, Tae Siek
Hwang, Chung Yeon
Taehyoung Lee
Victoria E. Irish
Ryan H. Mason
Gary D. Franc
Bruce F. Moffett
Allan K. Bertram
Timothy H. Bertram
Vicki H. Grassian
Olga Mayol-Bracero
Science & Technology - Other Topics
Icenucleating particles; Sea spray aerosol
Issue Date
Grant B. Deane, et al. 2016. "Sea spray aerosol as a unique source of ice nucleating particles". PROCEEDINGS OF THE NATIONAL ACADEMY OF SCIENCES OF THE UNITED STATES OF AMERICA, 113(21): 5797-5803.
Ice nucleating particles (INPs) are vital for ice initiation in, and precipitation from, mixed-phase clouds. A source of INPs from oceans within sea spray aerosol (SSA) emissions has been suggested in previous studies but remained unconfirmed. Here, we show that INPs are emitted using real wave breaking in a laboratory flume to produce SSA. The number concentrations of INPs from laboratorygenerated SSA, when normalized to typical total aerosol number Q:9 concentrations in the marine boundary layer, agree well with new Q:10 measurements from diverse regions over the oceans. New data are also in accord with previously published INP measurements made over remote ocean regions. INP number concentrations active within liquid water droplets increase exponentially in number with a decrease in temperature below 0 °C, averaging an order of magnitude increase per 5 °C interval. The plausibility of a strong increase in SSA INP emissions in association with phytoplankton blooms is also shown in laboratory simulations. Nevertheless, INP number concentrations, or active site densities approximated using “dry” geometric SSA surface areas, are a few orders of magnitude lower than corresponding concentrations or site densities in the surface boundary layer over continental regions. These findings have important implications for cloud radiative forcing and precipitation within low-level and midlevel marine clouds unaffected by continental INP sources, such as may occur over the Southern Ocean.
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