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Title: Tropical cloud buoyancy is the same in a world with or without ice

When convective clouds grow above the melting line, where temperatures fall below 0°C, condensed water begins to freeze and water vapor is deposited. These processes release the latent heat of fusion, which warms cloud air, and many previous studies have suggested that this heating from fusion increases cloud buoyancy in the upper troposphere. Here in this paper we use numerical simulations of radiative-convective equilibrium with and without ice processes to argue that tropical cloud buoyancy is not systematically higher in a world with fusion than in a world without it. This insensitivity results from the fact that the environmental temperature profile encountered by developing tropical clouds is itself determined by convection. We also offer a simple explanation for the large reservoir of convective available potential energy in the tropical upper troposphere that does not invoke ice.
Authors:
 [1] ;  [1]
  1. Univ. of California, Berkeley, CA (United States). Dept. of Earth and Planetary Science; Lawrence Berkeley National Lab. (LBNL), Berkeley, CA (United States). Climate and Ecosystem Sciences Division
Publication Date:
Grant/Contract Number:
AC02-05CH11231
Type:
Accepted Manuscript
Journal Name:
Geophysical Research Letters
Additional Journal Information:
Journal Volume: 43; Journal Issue: 7; Journal ID: ISSN 0094-8276
Publisher:
American Geophysical Union
Research Org:
Lawrence Berkeley National Lab. (LBNL), Berkeley, CA (United States)
Sponsoring Org:
USDOE Office of Science (SC), Biological and Environmental Research (BER) (SC-23)
Country of Publication:
United States
Language:
English
Subject:
54 ENVIRONMENTAL SCIENCES; convection; buoyancy; ice; latent heat
OSTI Identifier:
1471014

Seeley, Jacob T., and Romps, David M.. Tropical cloud buoyancy is the same in a world with or without ice. United States: N. p., Web. doi:10.1002/2016GL068583.
Seeley, Jacob T., & Romps, David M.. Tropical cloud buoyancy is the same in a world with or without ice. United States. doi:10.1002/2016GL068583.
Seeley, Jacob T., and Romps, David M.. 2016. "Tropical cloud buoyancy is the same in a world with or without ice". United States. doi:10.1002/2016GL068583. https://www.osti.gov/servlets/purl/1471014.
@article{osti_1471014,
title = {Tropical cloud buoyancy is the same in a world with or without ice},
author = {Seeley, Jacob T. and Romps, David M.},
abstractNote = {When convective clouds grow above the melting line, where temperatures fall below 0°C, condensed water begins to freeze and water vapor is deposited. These processes release the latent heat of fusion, which warms cloud air, and many previous studies have suggested that this heating from fusion increases cloud buoyancy in the upper troposphere. Here in this paper we use numerical simulations of radiative-convective equilibrium with and without ice processes to argue that tropical cloud buoyancy is not systematically higher in a world with fusion than in a world without it. This insensitivity results from the fact that the environmental temperature profile encountered by developing tropical clouds is itself determined by convection. We also offer a simple explanation for the large reservoir of convective available potential energy in the tropical upper troposphere that does not invoke ice.},
doi = {10.1002/2016GL068583},
journal = {Geophysical Research Letters},
number = 7,
volume = 43,
place = {United States},
year = {2016},
month = {3}
}