TY - JOUR
T1 - Marine stratocumulus aerosol-cloud relationships in the MASE-II experiment
T2 - Precipitation susceptibility in eastern Pacific marine stratocumulus
AU - Lu, Miao Ling
AU - Sorooshian, Armin
AU - Jonsson, Haflidi H.
AU - Feingold, Graham
AU - Flagan, Richard C.
AU - Seinfeld, John H.
PY - 2009/12
Y1 - 2009/12
N2 - [1] 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 re are associated with increased subcloud aerosol concentration. Modulation of drizzle by variations in aerosol levels is clearly evident. Variations of cloud base drizzle rate R cb are found to be consistent with the proportionality, R cb ∝ H3/Nc, 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.
AB - [1] 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 re are associated with increased subcloud aerosol concentration. Modulation of drizzle by variations in aerosol levels is clearly evident. Variations of cloud base drizzle rate R cb are found to be consistent with the proportionality, R cb ∝ H3/Nc, 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.
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U2 - 10.1029/2009JD012774
DO - 10.1029/2009JD012774
M3 - Article
AN - SCOPUS:77954205057
SN - 0148-0227
VL - 114
JO - Journal of Geophysical Research Atmospheres
JF - Journal of Geophysical Research Atmospheres
IS - 24
M1 - D24203
ER -