Deconvolution of boundary layer depth and aerosol constraints on cloud water path in subtropical stratocumulus decks
TL;DR: In this article, the LWP adjustment due to aerosol-cloud interactions in marine stratocumulus remains a considerable source of uncertainty for climate sensitivity estimates, and the authors use the susceptibility framework to quantify the potential change in liquid water path (LWP) adjustment with boundary layer (BL) depth.
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Abstract: . The liquid water path (LWP) adjustment due to aerosol–cloud interactions in marine stratocumulus remains a considerable source of uncertainty for climate sensitivity estimates. An unequivocal attribution of LWP adjustments to changes in aerosol concentration from climatology remains difficult due to the considerable covariance between meteorological conditions alongside changes in aerosol concentrations. We utilise the susceptibility framework to quantify the potential change in LWP adjustment with boundary layer (BL) depth in subtropical marine stratocumulus. We show that the LWP susceptibility, i.e. the relative change in LWP scaled by the relative change in cloud droplet number concentration, in marine BLs triples in magnitude from −0.1 to −0.31 as the BL deepens from 300 to 1200 m and deeper. We further find deep BLs to be underrepresented in pollution tracks, process modelling, and in situ studies of aerosol–cloud interactions in marine stratocumulus. Susceptibility estimates based on these approaches are skewed towards shallow BLs of moderate LWP susceptibility. Therefore, extrapolating LWP susceptibility estimates from shallow BLs to the entire cloud climatology may underestimate the true LWP adjustment within subtropical stratocumulus and thus overestimate the effective aerosol radiative forcing in this region. Meanwhile, LWP susceptibility estimates in deep BLs remain poorly constrained. While susceptibility estimates in shallow BLs are found to be consistent with process modelling studies, they overestimate pollution track estimates.
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References
Fully automated analysis of space-based lidar data: an overview of the CALIPSO retrieval algorithms and data products
Mark A. Vaughan,Stuart A. Young,David M. Winker,Kathleen A. Powell,Ali Omar,Zhaoyan Liu,Zhaoyan Liu,Yongxiang Hu,Chris A. Hostetler +8 more
TL;DR: An integrated analysis scheme that employs a nested, multi-grid averaging technique designed to optimize tradeoffs between spatial resolution and signal-to-noise ratio is described.
Satellite-based estimate of the direct and indirect aerosol climate forcing
TL;DR: In this paper, a measurement-based estimate using almost exclusively information from an Earth radiation budget instrument (CERES) and a radiometer (MODIS) was developed to derive a statistical relationship between planetary albedo and cloud properties, and further between the cloud properties and column aerosol concentration.
Satellite Observations of Precipitating Marine Stratocumulus Show Greater Cloud Fraction for Decoupled Clouds in Comparison to Coupled Clouds.
TL;DR: It is shown that decks of precipitating decoupled MSC have larger CF compared to similarly precipitating coupled MSC, suggesting that decoupling is a feature related to higher cloud radiative effect in precipitating MSC.
Supplement to Dynamics and Chemistry of Marine Stratocumulus—DYCOMS-II
Bjorn Stevens,Donald H. Lenschow,Gabor Vali,Hermann E. Gerber,Alan R. Bandy,Byron Blomquist,J-L. Brenguier,Christopher S. Bretherton,Frédéric Burnet,Teresa Campos,Steven K. Chai,Ian Faloona,D. Friesen,Samuel Haimov,Krista K. Laursen,Douglas K. Lilly,Scot M. Loehrer,Szymon P. Malinowski,Bruce Morley,Markus D. Petters,D. C. Rogers,Lynn M. Russell,Verica Savic-Jovcic,J. R. Snider,D. Straub,Marcin J. Szumowski,H. Takagi,Donald C. Thornton,M. Tschudi,Cynthia H. Twohy,Melanie A. Wetzel,M. C. van Zanten +31 more
Constraining cloud lifetime effects of aerosols using A‐Train satellite observations
Minghuai Wang,Steven J. Ghan,Xiaohong Liu,Tristan L'Ecuyer,Kai Zhang,Hugh Morrison,Mikhail Ovchinnikov,Richard C. Easter,Roger Marchand,Duli Chand,Yun Qian,Joyce E. Penner +11 more
TL;DR: In this article, the dependence of the probability of precipitation on aerosol loading, termed the precipitation frequency susceptibility (Spop), is used as a good measure of the liquid water path response to aerosol perturbation.