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| Titel |
A new data set of soil mineralogy for dust-cycle modeling |
| VerfasserIn |
E. Journet, Y. Balkanski, S. P. Harrison |
| Medientyp |
Artikel
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| Sprache |
Englisch
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| ISSN |
1680-7316
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| Digitales Dokument |
URL |
| Erschienen |
In: Atmospheric Chemistry and Physics ; 14, no. 8 ; Nr. 14, no. 8 (2014-04-16), S.3801-3816 |
| Datensatznummer |
250118617
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| Publikation (Nr.) |
 copernicus.org/acp-14-3801-2014.pdf |
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| Zusammenfassung |
| The mineralogy of airborne dust affects the impact of dust particles on
direct and indirect radiative forcing, on atmospheric chemistry and on
biogeochemical cycling. It is determined partly by the mineralogy of the
dust-source regions and partly by size-dependent fractionation during
erosion and transport. Here we present a data set that characterizes the
clay and silt-sized fractions of global soil units in terms of the abundance
of 12 minerals that are important for dust–climate interactions: quartz,
feldspars, illite, smectite, kaolinite, chlorite, vermiculite, mica,
calcite, gypsum, hematite and goethite. The basic mineralogical information
is derived from the literature, and is then expanded following explicit
rules, in order to characterize as many soil units as possible. We present
three alternative realizations of the mineralogical maps, taking the
uncertainties in the mineralogical data into account. We examine the
implications of the new database for calculations of the single scattering
albedo of airborne dust and thus for dust radiative forcing. |
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