 |
| Titel |
Adaptive method of lines for multi-component aerosol condensational growth and CCN activation |
| VerfasserIn |
S. Arabas, H. Pawlowska |
| Medientyp |
Artikel
|
| Sprache |
Englisch
|
| ISSN |
1991-959X
|
| Digitales Dokument |
URL |
| Erschienen |
In: Geoscientific Model Development ; 4, no. 1 ; Nr. 4, no. 1 (2011-01-21), S.15-31 |
| Datensatznummer |
250001551
|
| Publikation (Nr.) |
 copernicus.org/gmd-4-15-2011.pdf |
|
|
|
|
|
| Zusammenfassung |
| The process of formation of cloud droplets on an ensemble of aerosol
particles is modelled by numerous investigators using the method of lines
(MOL). The method involves discretisation of the aerosol size spectrum into
bins whose positions evolve with time. One of the drawbacks of the method is
its poor representation of the aerosol spectrum shape in the region between
the unactivated aerosol mode and the activated droplet mode. An adaptive grid
refinement procedure is introduced. The procedure splits any overly wide bins
into several narrower ones during integration. The number of new bins added
is a function of particle concentration in the bin being split. Application
of the grid refinement procedure results in suppression of the sensitivity of
the computed cloud droplet spectrum characteristics such as droplet number
concentration or effective radius to the initial grid choice. A model of
droplet formation on multi-component aerosol is formulated for the purpose of
the study. Model formulation includes explicit treatment of the droplet
temperature evolution. Several examples of the model set-up are used to
demonstrate model capabilities. Model results are compared to those without
adaptivity. A C++ implementation of the model is available as an electronic
supplement of the paper. |
| |
|
| Teil von |
|
|
|
|
|
|
|
|