Title: Vertical Variations of Cloud Microphysical Relationships in Marine Stratocumulus Clouds Observed During the ACE‐ENA Campaign

Abstract

This study examines the vertical variations of cloud microphysical relationships and their implications to cloud microphysical processes in marine stratocumulus clouds using in-situ aircraft observations during the Aerosol and Cloud Experiments in Eastern North Atlantic (ACE-ENA) field campaign. A new diagram with a coordinate system based on cloud droplet liquid water content (L_c) and phase relaxation time scale is proposed to investigate mixing mechanisms. This new diagram analysis shows that the inhomogeneous mixing trait is dominant near the cloud top, but homogeneous mixing trait is stronger at lower altitudes. The relevant scale parameters (i.e., transition length scale and transition scale number) also indicate a high likelihood of inhomogeneous mixing. The relationship between L_c and standard deviation of droplet radius (σ_R) clearly shows the vertical transition: the correlation between L_c and σ_R is positive at lower cloud altitudes, but it becomes negative as altitude increases. Such a vertical transition is consistent with the vertical circulation mixing, modulating the cloud microphysical relationships to suggest homogeneous mixing at a significant depth from the cloud top.

Authors:

Yeom, Jae Min  ^[1];

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• Search DOE PAGES for ORCID "0000-0001-8528-2075"

Yum, Seong Soo  ^[2];

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• Search DOE PAGES for ORCID "0000-0002-0879-1615"

Shaw, Raymond A. ^[3]; La, Inyeob ^[2]; Wang, Jian ^[4]; Lu, Chunsong  ^[5];

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Liu, Yangang  ^[6];

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Mei, Fan  ^[7];

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• Search DOE PAGES for ORCID "0000-0003-4285-2749"

Schmid, Beat  ^[7];

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• Search DOE PAGES for ORCID "0000-0002-4705-8715"

Matthews, Alyssa  ^[7]

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• Search DOE PAGES for ORCID "0000-0003-0544-528X"

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+ Show Author Affiliations

1. Department of Physics Michigan Technological University MI USA, Department of Atmospheric Sciences Yonsei University Seoul Korea
2. Department of Atmospheric Sciences Yonsei University Seoul Korea
3. Department of Physics Michigan Technological University MI USA
4. Department of Energy Environmental and Chemical Engineering Center for Aerosol Science and Engineering University of Washington St. Louis WA USA
5. Key Laboratory for Aerosol‐Cloud‐Precipitation of China Meteorological Administration/Collaborative Innovation Center on Forecast and Evaluation of Meteorological Disasters (CIC‐FEMD) Nanjing University of Information Science &, Technology Nanjing China
6. Environmental and Climate Sciences Department Brookhaven National Laboratory Upton NY USA
7. Pacific Northwest National Laboratory Richland WA USA

Publication Date:

Mon Dec 13 00:00:00 EST 2021

Research Org.:

Oak Ridge National Lab. (ORNL), Oak Ridge, TN (United States). Atmospheric Radiation Measurement (ARM) Data Center; Brookhaven National Laboratory (BNL), Upton, NY (United States); Pacific Northwest National Laboratory (PNNL), Richland, WA (United States)

Sponsoring Org.:

USDOE Office of Science (SC), Biological and Environmental Research (BER); National Natural Science Foundation of China (NSFC); National Research Foundation of Korea (NRF); Korea government (MSIT)

Contributing Org.:

Argonne National Lab. (ANL), Argonne, IL (United States)

OSTI Identifier:

1835384

Alternate Identifier(s):

OSTI ID: 1832762; OSTI ID: 1832765; OSTI ID: 1835387; OSTI ID: 1841574

Report Number(s):

BNL-222437-2021-JAAM; PNNL-SA-159750
Journal ID: ISSN 2169-897X; e2021JD034700

Grant/Contract Number:  

DE‐SC0020052; SC0020053; SC0012704; SC0020052; AC05-76RL01830

Resource Type:

Published Article

Journal Name:

Journal of Geophysical Research: Atmospheres

Additional Journal Information:

Journal Name: Journal of Geophysical Research: Atmospheres Journal Volume: 126 Journal Issue: 24; Journal ID: ISSN 2169-897X

Publisher:

American Geophysical Union (AGU)

Country of Publication:

United States

Language:

English

Subject:

54 ENVIRONMENTAL SCIENCES