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| Titel |
Detection of anthropogenic dust using CALIPSO lidar measurements |
| VerfasserIn |
J. P. Huang, J. J. Liu, B. Chen, S. L. Nasiri |
| 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 ; 15, no. 20 ; Nr. 15, no. 20 (2015-10-21), S.11653-11665 |
| Datensatznummer |
250120109
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| Publikation (Nr.) |
 copernicus.org/acp-15-11653-2015.pdf |
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| Zusammenfassung |
| Anthropogenic dusts are those produced by human activities on disturbed
soils, which are mainly cropland, pastureland, and urbanized regions, and are a
subset of the total dust load which includes natural sources from desert
regions. Our knowledge of anthropogenic dusts is still very limited due to a
lack of data. To understand the contribution of anthropogenic dust to the
total global dust load, it is important to identify it apart from total dust. In
this study, a new technique for distinguishing anthropogenic dust from
natural dust is proposed by using Cloud-Aerosol Lidar and Infrared Pathfinder
Satellite Observation (CALIPSO) dust and planetary boundary layer (PBL)
height retrievals along with a land use data set. Using this technique, the
global distribution of dust is analyzed and the relative contribution of
anthropogenic and natural dust sources to regional and global emissions are
estimated. Results reveal that local anthropogenic dust aerosol due to human
activity, such as agriculture, industrial activity, transportation, and
overgrazing, accounts for about 25 % of the global continental dust load.
Of these anthropogenic dust aerosols, more than 53 % come from semi-arid
and semi-wet regions. Annual mean anthropogenic dust column burden (DCB)
values range from 0.42 g m−2, with a maximum in India, to
0.12 g m−2, with a minimum in North America. A better understanding of
anthropogenic dust emission will enable us to focus on human activities in
these critical regions and with such knowledge we will be more able to
improve global dust models and to explore the effects of anthropogenic
emission on radiative forcing, climate change, and air quality in the future. |
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