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| Titel |
Modelling atmospheric transport of α-hexachlorocyclohexane in the Northern Hemispherewith a 3-D dynamical model: DEHM-POP |
| VerfasserIn |
K. M. Hansen, J. H. Christensen, J. Brandt, L. M. Frohn, C. Geels |
| 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 ; 4, no. 4 ; Nr. 4, no. 4 (2004-07-13), S.1125-1137 |
| Datensatznummer |
250001843
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| Publikation (Nr.) |
 copernicus.org/acp-4-1125-2004.pdf |
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| Zusammenfassung |
| The Danish Eulerian Hemispheric Model (DEHM) is a 3-D dynamical
atmospheric transport model originally developed to describe the
atmospheric transport of sulphur into the Arctic. A new version of
the model, DEHM-POP, developed to study the atmospheric transport
and environmental fate of persistent organic pollutants (POPs) is
presented. During environmental cycling, POPs can be deposited and
re-emitted several times before reaching a final destination. A
description of the exchange processes between the land/ocean
surfaces and the atmosphere is included in the model to account
for this multi-hop transport. The α-isomer of the pesticide
hexachlorocyclohexane (α-HCH) is used as tracer in the
model development. The structure of the model and processes
included are described in detail. The results from a model
simulation showing the atmospheric transport for the years 1991 to
1998 are presented and evaluated against measurements. The annual
averaged atmospheric concentration of α-HCH for the 1990s
is well described by the model; however, the shorter-term average
concentration for most of the stations is not well captured. This
indicates that the present simple surface description needs to be
refined to get a better description of the air-surface exchange
processes of POPs. |
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