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Large-Eddy Simulations of Marine Boundary Layer Clouds Associated with Cold-Air Outbreaks during the ACTIVATE Campaign. Part I: Case Setup and Sensitivities to Large-Scale Forcings

Li, Xiang-Yu and Wang, Hailong and Chen, Jingyi and Endoe, Satoshi and George, Geet and Cairns, Brian and Chellappan, Seethala and Zeng, Xubin and Kirschler, Simon and Voigt, Christiane and Sorooshian, Armin and Crosbie, Ewan and Chen, Gao and Ferrare, Richard and Gustafson, William I. Jr. and Hair, J. W. and Kleb, Mary M. and Liu, Hongyu and Moore, Richard H. and Painemal, David and Robinson, Claire and Scarino, Amy Jo and Shook, Michael and Shingler, Taylor and Thornhill, Kenneth L. and Tornow, Florian and Xiao, Heng and Ziemba, Luke D. and Zuidema, Paquita (2022) Large-Eddy Simulations of Marine Boundary Layer Clouds Associated with Cold-Air Outbreaks during the ACTIVATE Campaign. Part I: Case Setup and Sensitivities to Large-Scale Forcings. Journal of the Atmospheric Sciences, 79 (1), pp. 73-100. American Meteorological Society. doi: 10.1175/JAS-D-21-0123.1. ISSN 0022-4928.

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Official URL: https://dx.doi.org/10.1175/JAS-D-21-0123.1

Abstract

ABSTRACT: Large-eddy simulation (LES) is able to capture key boundary layer (BL) turbulence and cloud processes. Yet, large-scale forcing and surface turbulent fluxes of sensible and latent heat are often poorly prescribed for LESs. We derive these quantities from measurements and reanalysis obtained for two cold-air outbreak (CAO) events during Phase I of the Aerosol Cloud Meteorology Interactions over the Western Atlantic Experiment (ACTIVATE) in February–March 2020. We study the two contrasting CAO cases by performing LES and test the sensitivity of BL structure and clouds to large-scale forcings and turbulent heat fluxes. Profiles of atmospheric state and large-scale divergence and surface turbulent heat fluxes obtained from ERA5 data agree reasonably well with those derived from ACTIVATE field measurements for both cases at the sampling time and location. Therefore, we adopt the time-evolving heat fluxes, wind, and advective tendencies profiles from ERA5 data to drive the LES. We find that large-scale thermodynamic advective tendencies and wind relaxations are important for the LES to capture the evolving observed BL meteorological states characterized by the hourly ERA5 data and validated by the observations. We show that the divergence (or vertical velocity) is important in regulating the BL growth driven by surface heat fluxes in LESs. The evolution of liquid water path is largely affected by the evolution of surface heat fluxes. The liquid water path simulated in LES agrees reasonably well with the ACTIVATE measurements. This study paves the path to investigate aerosol–cloud–meteorology interactions using LES informed and evaluated by ACTIVATE field measurements.

Item URL in elib:https://elib.dlr.de/185837/
Document Type:Article
Title:Large-Eddy Simulations of Marine Boundary Layer Clouds Associated with Cold-Air Outbreaks during the ACTIVATE Campaign. Part I: Case Setup and Sensitivities to Large-Scale Forcings
Authors:
AuthorsInstitution or Email of AuthorsAuthor's ORCID iD
Li, Xiang-YuPacific Northwest National Laboratory, Richland, WashingtonUNSPECIFIED
Wang, HailongPacific Northwest National Laboratory, Richland, WA, USAUNSPECIFIED
Chen, JingyiPacific Northwest National Laboratory, Richland, WashingtonUNSPECIFIED
Endoe, SatoshiBrookhaven National Laboratory, Upton, New YorkUNSPECIFIED
George, GeetInternational Max Planck Research School on Earth System Modelling, Max Planck Institute for Meteorology, Hamburg, Germanyhttps://orcid.org/0000-0002-1579-4523
Cairns, BrianNASA Goddard Institute for Space Studies, New York, New YorkUNSPECIFIED
Chellappan, SeethalaUniversity of Miami, Miami, FL, USAUNSPECIFIED
Zeng, XubinUniversity of Arizona, Tucson, AZ, USAUNSPECIFIED
Kirschler, SimonDLR, IPAUNSPECIFIED
Voigt, ChristianeDLR, IPAhttps://orcid.org/0000-0001-8925-7731
Sorooshian, ArminUniversity of Arizona, Tucson, AZ, USAUNSPECIFIED
Crosbie, EwanNASA Langley Research Center, Hampton, Virginia, USAUNSPECIFIED
Chen, GaoNASA Langley Research Center, Hampton, VirginiaUNSPECIFIED
Ferrare, RichardNASA Langley Research Center, Hampton, VA, USAUNSPECIFIED
Gustafson, William I. Jr.Pacific Northwest National Laboratory, Richland, WashingtonUNSPECIFIED
Hair, J. W.NASA Langley Research Center, Hampton, VI, USAUNSPECIFIED
Kleb, Mary M.NASA Langley Research Center, Hampton, VirginiaUNSPECIFIED
Liu, HongyuNational Institute of Aerospace, Hampton, VA, USAUNSPECIFIED
Moore, Richard H.NASA Langley Research Center, Hampton, VA, USAhttps://orcid.org/0000-0003-2911-4469
Painemal, DavidNASA Langley Research Center, Hampton, VA, USAUNSPECIFIED
Robinson, ClaireNASA Langley Research Center, Hampton, Virginia, USAUNSPECIFIED
Scarino, Amy JoNASA Langley Research Center, Hampton, VAUNSPECIFIED
Shook, MichaelNASA Langley Research Center, Hampton, Virginia, USAUNSPECIFIED
Shingler, TaylorNasa Langley Research Center, Hampton, VA, USAUNSPECIFIED
Thornhill, Kenneth L.NASA Langley Research Center, Hampton, Virginia, USAUNSPECIFIED
Tornow, FlorianCenter for Climate Systems Research, Earth Institute, Columbia University, New York, New YorkUNSPECIFIED
Xiao, HengPacific Northwest National Laboratory, Richland, WashingtonUNSPECIFIED
Ziemba, Luke D.Nasa Langley Research Center, Hampton, VA, USAUNSPECIFIED
Zuidema, PaquitaUniversity of Miami, Miami, FL, USAUNSPECIFIED
Date:2022
Journal or Publication Title:Journal of the Atmospheric Sciences
Refereed publication:Yes
Open Access:Yes
Gold Open Access:No
In SCOPUS:Yes
In ISI Web of Science:Yes
Volume:79
DOI :10.1175/JAS-D-21-0123.1
Page Range:pp. 73-100
Publisher:American Meteorological Society
ISSN:0022-4928
Status:Published
Keywords:cold fronts, Marine boundary layer, Air-sea interaction, clouds, aircraft observations, dropsondes, large eddy simultations
HGF - Research field:Aeronautics, Space and Transport
HGF - Program:Space
HGF - Program Themes:Earth Observation
DLR - Research area:Raumfahrt
DLR - Program:R EO - Earth Observation
DLR - Research theme (Project):R - Project Climatic relevance of atmospheric tracer gases, aerosols and clouds
Location: Oberpfaffenhofen
Institutes and Institutions:Institute of Atmospheric Physics > Cloud Physics
Deposited By: Keur, Natalie Desiree
Deposited On:23 Mar 2022 10:13
Last Modified:23 Mar 2022 10:13

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