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Title: Satellite estimates of precipitation susceptibility in low-level marine stratiform clouds

Abstract

Quantifying the sensitivity of warm rain to aerosols is important for constraining climate model estimates of aerosol indirect effects. In this study, the precipitation sensitivity to cloud droplet number concentration (Nd) in satellite retrievals is quantified by applying the precipitation susceptibility metric to a combined CloudSat/Moderate Resolution Imaging Spectroradiometer data set of stratus and stratocumulus clouds that cover the tropical and subtropical Pacific Ocean and Gulf of Mexico. We note that consistent with previous observational studies of marine stratocumulus, precipitation susceptibility decreases with increasing liquid water path (LWP), and the susceptibility of the mean precipitation rate R is nearly equal to the sum of the susceptibilities of precipitation intensity and of probability of precipitation. Consistent with previous modeling studies, the satellite retrievals reveal that precipitation susceptibility varies not only with LWP but also with Nd. Puzzlingly, negative values of precipitation susceptibility are found at low LWP and high Nd. There is marked regional variation in precipitation susceptibility values that cannot simply be explained by regional variations in LWP and Nd. This suggests other controls on precipitation apart from LWP and Nd and that precipitation susceptibility will need to be quantified and understood at the regional scale when relating to itsmore » role in controlling possible aerosol-induced cloud lifetime effects.« less

Authors:
 [1];  [2];  [3]
  1. Univ. of Washington, Seattle, WA (United States). Dept. of Atmospheric Sciences; Colorado State Univ., Fort Collins, CO (United States). Dept. of Atmospheric Science
  2. Univ. of Washington, Seattle, WA (United States). Dept. of Atmospheric Sciences
  3. Lawrence Livermore National Lab. (LLNL), Livermore, CA (United States). Program for Climate Model Diagnosis and Intercomparison
Publication Date:
Research Org.:
Lawrence Livermore National Lab. (LLNL), Livermore, CA (United States)
Sponsoring Org.:
USDOE
OSTI Identifier:
1262165
Report Number(s):
LLNL-JRNL-667061
Journal ID: ISSN 2169-897X
Grant/Contract Number:  
AC52-07NA27344; AGS-1242639; NNX13AQ35G
Resource Type:
Accepted Manuscript
Journal Name:
Journal of Geophysical Research: Atmospheres
Additional Journal Information:
Journal Volume: 120; Journal Issue: 17; Journal ID: ISSN 2169-897X
Publisher:
American Geophysical Union
Country of Publication:
United States
Language:
English
Subject:
54 ENVIRONMENTAL SCIENCES; 58 GEOSCIENCES

Citation Formats

Terai, C. R., Wood, R., and Kubar, T. L. Satellite estimates of precipitation susceptibility in low-level marine stratiform clouds. United States: N. p., 2015. Web. doi:10.1002/2015JD023319.
Terai, C. R., Wood, R., & Kubar, T. L. Satellite estimates of precipitation susceptibility in low-level marine stratiform clouds. United States. https://doi.org/10.1002/2015JD023319
Terai, C. R., Wood, R., and Kubar, T. L. Sat . "Satellite estimates of precipitation susceptibility in low-level marine stratiform clouds". United States. https://doi.org/10.1002/2015JD023319. https://www.osti.gov/servlets/purl/1262165.
@article{osti_1262165,
title = {Satellite estimates of precipitation susceptibility in low-level marine stratiform clouds},
author = {Terai, C. R. and Wood, R. and Kubar, T. L.},
abstractNote = {Quantifying the sensitivity of warm rain to aerosols is important for constraining climate model estimates of aerosol indirect effects. In this study, the precipitation sensitivity to cloud droplet number concentration (Nd) in satellite retrievals is quantified by applying the precipitation susceptibility metric to a combined CloudSat/Moderate Resolution Imaging Spectroradiometer data set of stratus and stratocumulus clouds that cover the tropical and subtropical Pacific Ocean and Gulf of Mexico. We note that consistent with previous observational studies of marine stratocumulus, precipitation susceptibility decreases with increasing liquid water path (LWP), and the susceptibility of the mean precipitation rate R is nearly equal to the sum of the susceptibilities of precipitation intensity and of probability of precipitation. Consistent with previous modeling studies, the satellite retrievals reveal that precipitation susceptibility varies not only with LWP but also with Nd. Puzzlingly, negative values of precipitation susceptibility are found at low LWP and high Nd. There is marked regional variation in precipitation susceptibility values that cannot simply be explained by regional variations in LWP and Nd. This suggests other controls on precipitation apart from LWP and Nd and that precipitation susceptibility will need to be quantified and understood at the regional scale when relating to its role in controlling possible aerosol-induced cloud lifetime effects.},
doi = {10.1002/2015JD023319},
journal = {Journal of Geophysical Research: Atmospheres},
number = 17,
volume = 120,
place = {United States},
year = {Sat Sep 05 00:00:00 EDT 2015},
month = {Sat Sep 05 00:00:00 EDT 2015}
}

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Cited by: 15 works
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