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A new parameterization of cloud droplet activation applicable to general circulation models

Ming, Y ; Ramaswamy, V ; Donner, LJ and Phillips, Vaughan LU (2006) In Journal of Atmospheric Sciences 63(4). p.1348-1356
Abstract
A new parameterization is proposed to link the droplet number concentration to the size distribution and chemical composition of aerosol and updraft velocity. Except for an empirical assumption of droplet growth, the parameterization is formulated almost entirely on first principles to allow for satisfactory performance under a variety of conditions. For a series of updraft velocity ranging from 0.03 to 10.0 m s(-1), the droplet number concentrations predicted with the parameterization are in good agreement with the detailed parcel model simulations with an average error of -4 +/- 26% (one standard deviation). The accuracy is comparable to or better than some existing parameterizations. The parameterization is able to account for the... (More)
A new parameterization is proposed to link the droplet number concentration to the size distribution and chemical composition of aerosol and updraft velocity. Except for an empirical assumption of droplet growth, the parameterization is formulated almost entirely on first principles to allow for satisfactory performance under a variety of conditions. For a series of updraft velocity ranging from 0.03 to 10.0 m s(-1), the droplet number concentrations predicted with the parameterization are in good agreement with the detailed parcel model simulations with an average error of -4 +/- 26% (one standard deviation). The accuracy is comparable to or better than some existing parameterizations. The parameterization is able to account for the effects of droplet surface tension and mass accommodation coefficient on activation without adjusting the empirical parameter. These desirable attributes make the parameterization suitable for being used in the prognostic determination of the cloud droplet number concentration in general circulation models (GCMs). (Less)
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author
publishing date
type
Contribution to journal
publication status
published
subject
in
Journal of Atmospheric Sciences
volume
63
issue
4
pages
1348 - 1356
publisher
Amer Meteorological Soc
external identifiers
  • wos:000237197300014
  • scopus:33646232731
ISSN
1520-0469
DOI
10.1175/JAS3686.1
language
English
LU publication?
no
id
80dc2c2f-ff90-4034-a22e-96194a14cbc9 (old id 4587555)
date added to LUP
2016-04-01 11:39:53
date last changed
2019-10-23 02:03:25
@article{80dc2c2f-ff90-4034-a22e-96194a14cbc9,
  abstract     = {A new parameterization is proposed to link the droplet number concentration to the size distribution and chemical composition of aerosol and updraft velocity. Except for an empirical assumption of droplet growth, the parameterization is formulated almost entirely on first principles to allow for satisfactory performance under a variety of conditions. For a series of updraft velocity ranging from 0.03 to 10.0 m s(-1), the droplet number concentrations predicted with the parameterization are in good agreement with the detailed parcel model simulations with an average error of -4 +/- 26% (one standard deviation). The accuracy is comparable to or better than some existing parameterizations. The parameterization is able to account for the effects of droplet surface tension and mass accommodation coefficient on activation without adjusting the empirical parameter. These desirable attributes make the parameterization suitable for being used in the prognostic determination of the cloud droplet number concentration in general circulation models (GCMs).},
  author       = {Ming, Y and Ramaswamy, V and Donner, LJ and Phillips, Vaughan},
  issn         = {1520-0469},
  language     = {eng},
  number       = {4},
  pages        = {1348--1356},
  publisher    = {Amer Meteorological Soc},
  series       = {Journal of Atmospheric Sciences},
  title        = {A new parameterization of cloud droplet activation applicable to general circulation models},
  url          = {http://dx.doi.org/10.1175/JAS3686.1},
  doi          = {10.1175/JAS3686.1},
  volume       = {63},
  year         = {2006},
}