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| Titel |
Development and validation of a size-resolved particle dry deposition scheme for application in aerosol transport models |
| VerfasserIn |
A. Petroff, L. Zhang |
| Medientyp |
Artikel
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| Sprache |
Englisch
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| ISSN |
1991-959X
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| Digitales Dokument |
URL |
| Erschienen |
In: Geoscientific Model Development ; 3, no. 2 ; Nr. 3, no. 2 (2010-12-23), S.753-769 |
| Datensatznummer |
250000966
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| Publikation (Nr.) |
 copernicus.org/gmd-3-753-2010.pdf |
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| Zusammenfassung |
| A size-resolved particle dry deposition scheme is developed for inclusion in
large-scale air quality and climate models where the size distribution and
fate of atmospheric aerosols is of concern. The "resistance" structure is
similar to what is proposed by Zhang et al. (2001), while a new "surface"
deposition velocity (or surface resistance) is derived by simplification of a
one-dimensional aerosol transport model (Petroff et al., 2008b, 2009).
Compared to Zhang et al.'s model, the present model accounts for the leaf
size, shape and area index as well as the height of the vegetation canopy.
Consequently, it is more sensitive to the change of land covers, particularly
in the accumulation mode (0.1–1 micron). A drift velocity is included to
account for the phoretic effects related to temperature and humidity
gradients close to liquid and solid water surfaces. An extended comparison of
this model with experimental evidence is performed over typical land covers
such as bare ground, grass, coniferous forest, liquid and solid water
surfaces and highlights its adequate prediction. The predictions of the
present model differ from Zhang et al.'s model in the fine mode, where the
latter tends to over-estimate in a significant way the particle deposition,
as measured by various investigators or predicted by the present model. The
present development is thought to be useful to modellers of the atmospheric
aerosol who need an adequate parameterization of aerosol dry removal to the
earth surface, described here by 26 land covers. An open source code is
available in Fortran90. |
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