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| Titel |
Sources of black carbon aerosols in South Asia and surrounding regions during the Integrated Campaign for Aerosols, Gases and Radiation Budget (ICARB) |
| VerfasserIn |
R. Kumar, M. C. Barth, V. S. Nair, G. G. Pfister, S. Suresh Babu, S. K. Satheesh, K. Krishna Moorthy, G. R. Carmichael, Z. Lu, D. G. Streets |
| 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. 10 ; Nr. 15, no. 10 (2015-05-19), S.5415-5428 |
| Datensatznummer |
250119733
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| Publikation (Nr.) |
 copernicus.org/acp-15-5415-2015.pdf |
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| Zusammenfassung |
| This study examines differences in the surface black carbon (BC) aerosol
loading between the Bay of Bengal (BoB) and the Arabian Sea (AS) and
identifies dominant sources of BC in South Asia and surrounding regions
during March–May 2006 (Integrated Campaign for Aerosols, Gases and Radiation
Budget, ICARB) period. A total of 13 BC tracers are introduced in the
Weather Research and Forecasting Model coupled with Chemistry to address
these objectives. The model reproduced the temporal and spatial variability
of BC distribution observed over the AS and the BoB during the ICARB
ship cruise and captured spatial variability at the inland sites. In
general, the model underestimates the observed BC mass concentrations.
However, the model–observation discrepancy in this study is smaller compared
to previous studies. Model results show that ICARB measurements were fairly
well representative of the AS and the BoB during the
pre-monsoon season. Elevated BC mass concentrations in the BoB are due to
5 times stronger influence of anthropogenic emissions on the BoB compared
to the AS. Biomass burning in Burma also affects the BoB much more strongly
than the AS. Results show that anthropogenic and biomass burning emissions,
respectively, accounted for 60 and 37% of the average ± standard deviation (representing spatial and temporal variability) BC mass
concentration (1341 ± 2353 ng m−3) in South Asia. BC emissions
from residential (61%) and industrial (23%) sectors are the major
anthropogenic sources, except in the Himalayas where vehicular emissions
dominate. We find that regional-scale transport of anthropogenic emissions
contributes up to 25% of BC mass concentrations in western and eastern
India, suggesting that surface BC mass concentrations cannot be linked
directly to the local emissions in different regions of South Asia. |
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