TY - JOUR
T1 - Impact of Giant Sea Salt Aerosol Particles on Precipitation in Marine Cumuli and Stratocumuli
T2 - Lagrangian Cloud Model Simulations
AU - Dziekan, Piotr
AU - Jensen, JøRGEN B.
AU - Grabowski, Wojciech W.
AU - Pawlowska, Hanna
N1 - Publisher Copyright:
Ó 2021 American Meteorological Society.
PY - 2021/12
Y1 - 2021/12
N2 - The impact of giant sea salt aerosols released from breaking waves on rain formation in marine boundary layer clouds is studied using large-eddy simulations (LES). We perform simulations of marine cumuli and stratocumuli for various concentrations of cloud condensation nuclei (CCN) and giant CCN (GCCN). Cloud microphysics are modeled with a Lagrangian method that provides key improvements in comparison to previous LES of GCCN that used Eulerian bin microphysics. We find that GCCN significantly increase precipitation in stratocumuli. This effect is strongest for low and moderate CCN concentrations. GCCN are found to have a smaller impact on precipitation formation in cumuli. These conclusions are in agreement with field measurements. We develop a simple parameterization of the effect of GCCN on precipitation, accretion, and autoconversion rates in marine stratocumuli.
AB - The impact of giant sea salt aerosols released from breaking waves on rain formation in marine boundary layer clouds is studied using large-eddy simulations (LES). We perform simulations of marine cumuli and stratocumuli for various concentrations of cloud condensation nuclei (CCN) and giant CCN (GCCN). Cloud microphysics are modeled with a Lagrangian method that provides key improvements in comparison to previous LES of GCCN that used Eulerian bin microphysics. We find that GCCN significantly increase precipitation in stratocumuli. This effect is strongest for low and moderate CCN concentrations. GCCN are found to have a smaller impact on precipitation formation in cumuli. These conclusions are in agreement with field measurements. We develop a simple parameterization of the effect of GCCN on precipitation, accretion, and autoconversion rates in marine stratocumuli.
KW - Aerosol hygroscopicity
KW - Aerosol-cloud interaction
KW - Cloud microphysics
KW - Cloud parameterizations
KW - Large eddy simulations
UR - https://www.scopus.com/pages/publications/85121481656
U2 - 10.1175/JAS-D-21-0041.1
DO - 10.1175/JAS-D-21-0041.1
M3 - Article
AN - SCOPUS:85121481656
SN - 0022-4928
VL - 78
SP - 4127
EP - 4142
JO - Journal of the Atmospheric Sciences
JF - Journal of the Atmospheric Sciences
IS - 12
ER -