Large-Eddy Simulations of Marine Boundary Layer Clouds Associated with Cold-Air Outbreaks during the ACTIVATE Campaign. Part II: Aerosol–Meteorology–Cloud Interaction-Reference-Cited by-同舟云学术

Large-Eddy Simulations of Marine Boundary Layer Clouds Associated with Cold-Air Outbreaks during the ACTIVATE Campaign. Part II: Aerosol–Meteorology–Cloud Interaction

Published:2023-04 Issue:4 Volume:80 Page:1025-1045
ISSN:0022-4928
Container-title:Journal of the Atmospheric Sciences
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Author:

Li Xiang-Yu¹^ORCID,Wang Hailong¹,Chen Jingyi¹,Endo Satoshi²,Kirschler Simon³⁴,Voigt Christiane³⁴,Crosbie Ewan⁵⁶,Ziemba Luke D.⁵,Painemal David⁵⁶,Cairns Brian⁷,Hair Johnathan W.⁵,Corral Andrea F.⁸,Robinson Claire⁶,Dadashazar Hossein⁸,Sorooshian Armin⁸⁹,Chen Gao⁵,Ferrare Richard Anthony⁵,Kleb Mary M.⁵,Liu Hongyu¹⁰,Moore Richard⁵,Scarino Amy Jo⁶⁵,Shook Michael A.⁵,Shingler Taylor J.⁵,Thornhill Kenneth Lee⁶⁵,Tornow Florian⁷¹¹,Xiao Heng¹,Zeng Xubin⁹

Affiliation:

1. a Pacific Northwest National Laboratory, Richland, Washington

2. b Brookhaven National Laboratory, Upton, New York

3. c Institut für Physik der Atmosphäre, Deutsches Zentrum für Luft- und Raumfahrt, Oberpfaffenhofen, Germany

4. d Institute for Physics of the Atmosphere, Johannes Gutenberg-University Mainz, Mainz, Germany

5. e NASA Langley Research Center, Hampton, Virginia

6. f Science Systems and Applications, Inc., Hampton, Virginia

7. g NASA Goddard Institute for Space Studies, New York, New York

8. h Department of Chemical and Environmental Engineering, The University of Arizona, Tucson, Arizona

9. i Department of Hydrology and Atmospheric Sciences, The University of Arizona, Tucson, Arizona

10. j National Institute of Aerospace, Hampton, Virginia

11. k Center for Climate Systems Research, Earth Institute, Columbia University, New York, New York

Abstract

Abstract Aerosol effects on micro/macrophysical properties of marine stratocumulus clouds over the western North Atlantic Ocean (WNAO) are investigated using in situ measurements and large-eddy simulations (LES) for two cold-air outbreak (CAO) cases (28 February and 1 March 2020) during the Aerosol Cloud Meteorology Interactions over the Western Atlantic Experiment (ACTIVATE). The LES is able to reproduce the vertical profiles of liquid water content (LWC), effective radius reff and cloud droplet number concentration Nc from fast cloud droplet probe (FCDP) in situ measurements for both cases. Furthermore, we show that aerosols affect cloud properties (Nc, reff, and LWC) via the prescribed bulk hygroscopicity of aerosols () and aerosol size distribution characteristics. Nc, reff, and liquid water path (LWP) are positively correlated to and aerosol number concentration (Na) while cloud fractional cover (CFC) is insensitive to and aerosol size distributions for the two cases. The realistic changes to aerosol size distribution (number concentration, width, and the geometrical diameter) with the same meteorology state allow us to investigate aerosol effects on cloud properties without meteorological feedback. We also use the LES results to evaluate cloud properties from two reanalysis products, ERA5 and MERRA-2. Compared to LES, the ERA5 is able to capture the time evolution of LWP and total cloud coverage within the study domain during both CAO cases while MERRA-2 underestimates them.

Funder

Earth Sciences Division

Publisher

American Meteorological Society

Subject

Atmospheric Science

Link

https://journals.ametsoc.org/downloadpdf/journals/atsc/80/4/JAS-D-21-0324.1.xml

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