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Physically based parameterization of cirrus cloud formation for use in global atmospheric models

Kärcher, B. and Hendricks, J. and Lohmann, U. (2006) Physically based parameterization of cirrus cloud formation for use in global atmospheric models. Journal of Geophysical Research, 111, D01205-1-D01205-11. DOI: 10.1029/2005JD006219.

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Official URL: http://www.agu.org/pubs/crossref/2006/2005JD006219.shtml


Motivated by the need to study the climatic impact of aerosol-related cirrus cloud changes, a physically based parameterization scheme of ice initiation and initial growth of ice crystals in young cirrus clouds has been developed. The scheme tracks the number density and size of nucleated ice crystals as a function of vertical wind speed, temperature, ice saturation ratio, aerosol number size distributions, and preexisting cloud ice, allowing for competition between heterogeneous ice nuclei and liquid aerosol particles during freezing. Predictions of the parameterization are compared with numerical parcel simulations of ice nucleation and growth from atmospheric aerosols, with a special focus on explaining the indirect effects of ice nuclei on the properties of young cirrus clouds. The uncertainties of the parameterization are discussed and its implementation in a general circulation model is briefly outlined. This new scheme establishes a flexible framework for a comprehensive assessment of indirect aerosol effects on and properties of cirrus clouds in global climate, chemistry transport, and weather forecast models.

Document Type:Article
Title:Physically based parameterization of cirrus cloud formation for use in global atmospheric models
AuthorsInstitution or Email of Authors
Lohmann, U.ETH Zürich, Zurich, CH
Journal or Publication Title:Journal of Geophysical Research
Refereed publication:Yes
In Open Access:No
In ISI Web of Science:Yes
Page Range:D01205-1-D01205-11
Keywords:cirrus clouds; global models; parameterization
HGF - Research field:Aeronautics, Space and Transport (old)
HGF - Program:Space (old)
HGF - Program Themes:W EO - Erdbeobachtung
DLR - Research area:Space
DLR - Program:W EO - Erdbeobachtung
DLR - Research theme (Project):W - Vorhaben Atmosphären- und Klimaforschung (old)
Location: Oberpfaffenhofen
Institutes and Institutions:Institute of Atmospheric Physics > Atmospheric Trace Species
Deposited By: Jana Freund
Deposited On:17 Jul 2007
Last Modified:11 Nov 2014 21:56

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