Title Analytical treatment of ice sublimation and test of sublimation parameterisations in two-moment ice microphysics models
Author Gierens, K.; Bretl, S.
Author Affil Gierens, K., Deutsches Zentrum für Luft- und Raumfahrt, Institut für Physik der Atmosphäre, Oberpfaffenhofen, Germany
Source Atmospheric Chemistry and Physics, 9(19), p.7481-7490, . Publisher: Copernicus, Katlenburg-Lindau, International. ISSN: 1680- 7316
Publication Date 2009
Notes In English. Includes appendices; published in Atmospheric Chemistry and Physics Discussions: 30 April 2009, http://www.atmos-chem-phys- discuss.net/9/10549/2009/acpd-9-10549- 2009.html; accessed in May, 2011. 14 refs. GeoRef Acc. No: 310154
Index Terms clouds (meteorology); crystals; distribution; humidity; ice; ice crystals; analysis (mathematics); models; sublimation; clouds; eddies; mass; mathematical methods; power law; saturation; spatial distribution; temporal distribution; two-dimensional models
Abstract We derive an analytic solution to the spectral growth/sublimation equation for ice crystals and apply it to idealised cases. The results are used to test parameterisations of the ice sublimation process in two-moment bulk microphysics models. Although it turns out that the relation between number loss fraction and mass loss fraction is not a function since it is not unique, it seems that a functional parameterisation is the best that one can do in a bulk model. Testing a more realistic case with humidity oscillations shows that artificial crystal loss can occur in simulations of mature cirrus clouds with relative humidity fluctuating about ice saturation.
URL http://www.atmos-chem-phys.net/9/7481/2009/acp-9-7481-2009.pdf
Publication Type journal article
Record ID 65006699