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| Titel |
Evaluation of GEOS-5 sulfur dioxide simulations during the Frostburg, MD 2010 field campaign |
| VerfasserIn |
V. Buchard, A. M. da Silva, P. Colarco, N. Krotkov, R. R. Dickerson, J. W. Stehr, G. Mount, E. Spinei, H. L. Arkinson, H. He |
| 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. 4 ; Nr. 14, no. 4 (2014-02-20), S.1929-1941 |
| Datensatznummer |
250118415
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| Publikation (Nr.) |
 copernicus.org/acp-14-1929-2014.pdf |
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| Zusammenfassung |
| Sulfur dioxide (SO2) is a major atmospheric pollutant with
a strong anthropogenic component mostly produced by the combustion
of fossil fuel and other industrial activities. As a precursor of
sulfate aerosols that affect climate, air quality, and human health,
this gas needs to be monitored on a global scale. Global climate and
chemistry models including aerosol processes along with their
radiative effects are important tools for climate and air quality
research. Validation of these models against in-situ and satellite
measurements is essential to ascertain the credibility of these
models and to guide model improvements. In this study, the Goddard
Chemistry, Aerosol, Radiation, and Transport (GOCART) module running
on-line inside the Goddard Earth Observing System version 5 (GEOS-5)
model is used to simulate aerosol and SO2
concentrations. Data taken in November 2010 over Frostburg, Maryland
during an SO2 field campaign involving ground
instrumentation and aircraft are used to evaluate GEOS-5 simulated
SO2 concentrations. Preliminary data analysis indicated the
model overestimated surface SO2 concentration, which
motivated the examination of the specification of SO2 anthropogenic emission rates. As
a result of this analysis, a revision of anthropogenic emission
inventories in GEOS-5 was implemented, and the vertical placement of
SO2 sources was updated. Results show that these revisions
improve the model agreement with observations locally and in regions
outside the area of this field campaign. In particular, we use the
ground-based measurements collected by the United States
Environmental Protection Agency (US EPA) for the year 2010 to
evaluate the revised model simulations over North America. |
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