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| Titel |
Evaluation of black carbon emission inventories using a Lagrangian dispersion model – a case study over southern India |
| VerfasserIn |
H. S. Gadhavi, K. Renuka, V. Ravi Kiran, A. Jayaraman, A. Stohl, Z. Klimont, G. Beig |
| 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. 3 ; Nr. 15, no. 3 (2015-02-10), S.1447-1461 |
| Datensatznummer |
250119401
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| Publikation (Nr.) |
 copernicus.org/acp-15-1447-2015.pdf |
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| Zusammenfassung |
| We evaluated three emission inventories of black carbon (BC) using Lagrangian
particle dispersion model simulations and BC observations from a rural site
in southern India (Gadanki; 13.48° N, 79.18° E) from 2008
to 2012. We found that 93 to 95% of the BC load at the observation site
originated from emissions in India and the rest from the neighbouring
countries and shipping. A substantial fraction (33 to 43%) of the BC was
transported from northern India. Wet deposition is found to play a minor role
in reducing BC mass at the site because of its proximity to BC sources during
rainy season and relatively short rainy season over western and northern
parts of India. Seasonally, the highest BC concentration (approx.
3.3 μg m−3) is observed during winter, followed by spring
(approx. 2.8 μg m−3). While the model reproduced well the
seasonal cycle, the modelled BC concentrations are significantly lower than
observed values, especially in spring. The model bias is correlated to fire
radiative power – a proxy of open biomass burning activity. Using potential
emission sensitivity maps derived using the model, we suggest that
underestimation of BC mass in the model during spring is due to the
underestimation of BC fluxes over southern India (possibly from
open-biomass-burning/forest-fires). The overall performance of the model
simulations using three different emission inventories (SAFAR-India, ECLIPSE
and RETRO) is similar, with ECLIPSE and SAFAR-India performing marginally
better as both have about 30% higher emissions for India than RETRO. The
ratio of observed to modelled annual mean BC concentration was estimated as
1.5 for SAFAR, 1.7 for ECLIPSE and 2.4 for RETRO. |
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