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Title: Clouds, Precipitation, and Marine Boundary Layer Structure during the MAGIC Field Campaign

Abstract

The recent ship-based MAGIC (Marine ARM GCSS Pacific Cross-Section Intercomparison (GPCI) Investigation of Clouds) field campaign with the marine-capable Second ARM Mobile Facility (AMF2) deployed on the Horizon Lines cargo container M/V Spirit provided nearly 200 days of intraseasonal high-resolution observations of clouds, precipitation, and marine boundary layer (MBL) structure on multiple legs between Los Angeles, California, and Honolulu, Hawaii. During the deployment, MBL clouds exhibited a much higher frequency of occurrence than other cloud types and occurred more often in the warm season than in the cold season. MBL clouds demonstrated a propensity to produce precipitation, which often evaporated before reaching the ocean surface. The formation of stratocumulus is strongly correlated to a shallow MBL with a strong inversion and a weak transition, while cumulus formation is associated with a much weaker inversion and stronger transition. The estimated inversion strength is shown to depend seasonally on the potential temperature at 700 hPa. The location of the commencement of systematic MBL decoupling always occurred eastward of the locations of cloud breakup, and the systematic decoupling showed a strong moisture stratification. The entrainment of the dry warm air above the inversion appears to be the dominant factor triggering the systematic decoupling,more » while surface latent heat flux, precipitation, and diurnal circulation did not play major roles. MBL clouds broke up over a short spatial region due to the changes in the synoptic conditions, implying that in real atmospheric conditions the MBL clouds do not have enough time to evolve as in the idealized models. (auth)« less

Authors:
 [1];  [1];  [2]
  1. McGill Univ., Montreal, Quebec (Canada); Dept. of Atmospheric and Oceanic Sciences
  2. Brookhaven National Lab., Upton, NY (United States). Biological, Environmental, and Climate Sciences Dept.
Publication Date:
Research Org.:
Brookhaven National Lab. (BNL), Upton, NY (United States)
Sponsoring Org.:
USDOE Office of Science (SC)
OSTI Identifier:
1169563
Report Number(s):
BNL-107366-2015-JA
Journal ID: ISSN 0894-8755; R&D Project: 2016-BNL-EE630EECA-Budg; KP1701000
Grant/Contract Number:  
SC00112704
Resource Type:
Journal Article: Accepted Manuscript
Journal Name:
Journal of Climate
Additional Journal Information:
Journal Volume: 28; Journal Issue: 6; Journal ID: ISSN 0894-8755
Publisher:
American Meteorological Society
Country of Publication:
United States
Language:
English
Subject:
54 ENVIRONMENTAL SCIENCES

Citation Formats

Zhou, Xiaoli, Kollias, Pavlos, and Lewis, Ernie R. Clouds, Precipitation, and Marine Boundary Layer Structure during the MAGIC Field Campaign. United States: N. p., 2015. Web. doi:10.1175/JCLI-D-14-00320.1.
Zhou, Xiaoli, Kollias, Pavlos, & Lewis, Ernie R. Clouds, Precipitation, and Marine Boundary Layer Structure during the MAGIC Field Campaign. United States. https://doi.org/10.1175/JCLI-D-14-00320.1
Zhou, Xiaoli, Kollias, Pavlos, and Lewis, Ernie R. 2015. "Clouds, Precipitation, and Marine Boundary Layer Structure during the MAGIC Field Campaign". United States. https://doi.org/10.1175/JCLI-D-14-00320.1. https://www.osti.gov/servlets/purl/1169563.
@article{osti_1169563,
title = {Clouds, Precipitation, and Marine Boundary Layer Structure during the MAGIC Field Campaign},
author = {Zhou, Xiaoli and Kollias, Pavlos and Lewis, Ernie R.},
abstractNote = {The recent ship-based MAGIC (Marine ARM GCSS Pacific Cross-Section Intercomparison (GPCI) Investigation of Clouds) field campaign with the marine-capable Second ARM Mobile Facility (AMF2) deployed on the Horizon Lines cargo container M/V Spirit provided nearly 200 days of intraseasonal high-resolution observations of clouds, precipitation, and marine boundary layer (MBL) structure on multiple legs between Los Angeles, California, and Honolulu, Hawaii. During the deployment, MBL clouds exhibited a much higher frequency of occurrence than other cloud types and occurred more often in the warm season than in the cold season. MBL clouds demonstrated a propensity to produce precipitation, which often evaporated before reaching the ocean surface. The formation of stratocumulus is strongly correlated to a shallow MBL with a strong inversion and a weak transition, while cumulus formation is associated with a much weaker inversion and stronger transition. The estimated inversion strength is shown to depend seasonally on the potential temperature at 700 hPa. The location of the commencement of systematic MBL decoupling always occurred eastward of the locations of cloud breakup, and the systematic decoupling showed a strong moisture stratification. The entrainment of the dry warm air above the inversion appears to be the dominant factor triggering the systematic decoupling, while surface latent heat flux, precipitation, and diurnal circulation did not play major roles. MBL clouds broke up over a short spatial region due to the changes in the synoptic conditions, implying that in real atmospheric conditions the MBL clouds do not have enough time to evolve as in the idealized models. (auth)},
doi = {10.1175/JCLI-D-14-00320.1},
url = {https://www.osti.gov/biblio/1169563}, journal = {Journal of Climate},
issn = {0894-8755},
number = 6,
volume = 28,
place = {United States},
year = {2015},
month = {3}
}

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Cited by: 18 works
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Works referenced in this record:

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Estimating the Decoupling Degree of Subtropical Marine Stratocumulus Decks From Satellite
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Marine boundary layer aerosol in the eastern North Atlantic: seasonal variations and key controlling processes
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Variability of bulk water vapor content in the marine cloudy boundary layers from microwave and near-infrared imagery
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The Cumulus And Stratocumulus CloudSat-CALIPSO Dataset (CASCCAD)
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The Relationships Between Cloud Top Radiative Cooling Rates, Surface Latent Heat Fluxes, and Cloud-Base Heights in Marine Stratocumulus
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Cloud Edge Properties Measured by the ARM Shortwave Spectrometer Over Ocean and Land
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Impacts of solar-absorbing aerosol layers on the transition of stratocumulus to trade cumulus clouds
journal, January 2017


Estimates of entrainment in closed cellular marine stratocumulus clouds from the MAGIC field campaign
journal, March 2019

  • Ghate, Virendra P.; Mechem, David B.; Cadeddu, Maria P.
  • Quarterly Journal of the Royal Meteorological Society, Vol. 145, Issue 721
  • https://doi.org/10.1002/qj.3514

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Understanding Global Model Systematic Shortwave Radiation Errors in Subtropical Marine Boundary Layer Cloud Regimes
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Quantifying cloud base updraft speeds of marine stratocumulus from cloud top radiative cooling
journal, November 2016