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| Titel |
Development and uncertainty analysis of a high-resolution NH3 emissions inventory and its implications with precipitation over the Pearl River Delta region, China |
| VerfasserIn |
J. Y. Zheng, S. S. Yin, D. W. Kang, W. W. Che, L. J. Zhong |
| 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 ; 12, no. 15 ; Nr. 12, no. 15 (2012-08-06), S.7041-7058 |
| Datensatznummer |
250011369
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| Publikation (Nr.) |
 copernicus.org/acp-12-7041-2012.pdf |
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| Zusammenfassung |
| Detailed NH3 emission inventories are important to
understand various atmospheric processes, air quality modeling studies, air
pollution management, and related environmental and ecological issues. A
high-resolution NH3 emission inventory was developed based on
state-of-the-science techniques, up-to-date information, and
advanced expert knowledge for the Pearl River Delta region, China. To
provide model-ready emissions input, this NH3 emissions inventory was
spatially allocated to 3 km × 3 km grid cells using source-based
spatial surrogates with geographical information system (GIS) technology.
For NH3 emissions, 9 source categories and 45 subcategories were
identified in this region, and detailed spatial and temporal characteristics
were investigated. Results show that livestock is by far the most important
NH3 emission source by contributing about 61.7% of the total
NH3 emissions in this region, followed by nitrogen fertilizer
applications (~23.7%) and non-agricultural sources
(~14.6%). Uncertainty analysis reveals that the
uncertainties associated with different sources vary from source to source
and the magnitude of the uncertainty associated with a specific source
mainly depends on the degree of accuracy of the emission factors and
activity data as well as the technique used to perform the estimate. Further
studies should give priority to the hog, broiler, goose subsectors of the
livestock source and N fertilizer application source in order to reduce
uncertainties of ammonia emission estimates in this region. The validity of
the NH3 emissions inventory is justified by the trend analysis of local
precipitation compositions, such as pH values, the
Ca2++NH4+/SO42−+ NO3− ratios, and
NH4+ concentrations which are directly or indirectly related to
NH3 emissions. |
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