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| Titel |
NOx and O3 above a tropical rainforest: an analysis with a global and box model |
| VerfasserIn |
R. C. Pike, J. D. Lee, P. J. Young, G. D. Carver, X. Yang, N. Warwick, S. Moller, P. Misztal, B. Langford, D. Stewart, C. E. Reeves, C. N. Hewitt, J. A. Pyle |
| 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 ; 10, no. 21 ; Nr. 10, no. 21 (2010-11-11), S.10607-10620 |
| Datensatznummer |
250008884
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| Publikation (Nr.) |
 copernicus.org/acp-10-10607-2010.pdf |
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| Zusammenfassung |
| A cross-platform field campaign, OP3, was conducted in the state of Sabah in
Malaysian Borneo between April and July of 2008. Among the suite of
observations recorded, the campaign included measurements of NOx and
O3 – crucial outputs of any model chemistry mechanism. We describe the
measurements of these species made from both the ground site and aircraft. We
then use the output from two resolutions of the chemistry transport model
p-TOMCAT to illustrate the ability of a global model chemical mechanism to
capture the chemistry at the rainforest site. The basic model performance is
good for NOx and poor for ozone. A box model containing the same chemical
mechanism is used to explore the results of the global model in more depth
and make comparisons between the two. Without some parameterization of the
nighttime boundary layer – free troposphere mixing (i.e. the use of a dilution
parameter), the box model does not reproduce the observations, pointing to
the importance of adequately representing physical processes for comparisons
with surface measurements. We conclude with a discussion of box model budget
calculations of chemical reaction fluxes, deposition and mixing, and compare
these results to output from p-TOMCAT. These show the same chemical mechanism
behaves similarly in both models, but that emissions and advection play
particularly strong roles in influencing the comparison to surface
measurements. |
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