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| Titel |
Comparative evaluation of the impact of WRF/NMM and WRF/ARW meteorology on CMAQ simulations for PM2.5 and its related precursors during the 2006 TexAQS/GoMACCS study |
| VerfasserIn |
S. Yu, R. Mathur, J. Pleim, G. Pouliot, D. Wong, B. Eder, K. Schere, R. Gilliam, S. T. Rao |
| 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. 9 ; Nr. 12, no. 9 (2012-05-09), S.4091-4106 |
| Datensatznummer |
250011122
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| Publikation (Nr.) |
 copernicus.org/acp-12-4091-2012.pdf |
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| Zusammenfassung |
| This study presents a comparative evaluation of the impact of WRF-NMM and
WRF-ARW meteorology on CMAQ simulations of PM2.5, its composition and
related precursors over the eastern United States with the intensive
observations obtained by aircraft (NOAA WP-3), ship and surface monitoring
networks (AIRNow, IMPROVE, CASTNet and STN) during the 2006 TexAQS/GoMACCS
study. The results at the AIRNow surface sites show that both ARW-CMAQ and
NMM-CMAQ reproduced day-to-day variations of observed PM2.5 and
captured the majority of observed PM2.5 within a factor of 2 with a NMB
value of −0.4% for ARW-CMAQ and −18% for NMM-CMAQ. Both models
performed much better at the urban sites than at the rural sites, with
greater underpredictions at the rural sites. Both models consistently
underestimated the observed PM2.5 at the rural IMPROVE sites by −1%
for the ARW-CMAQ and −19% for the NMM-CMAQ. The greater underestimations
of SO42−, OC and EC by the NMM-CMAQ contributed to increased
underestimation of PM2.5 at the IMPROVE sites. The NMB values for
PM2.5 at the STN urban sites are 15% and −16% for the ARW-CMAQ
and NMM-CMAQ, respectively. The underestimation of PM2.5 at the STN
sites by the NMM-CMAQ mainly results from the underestimations of the
SO42−, NH4+ and TCM components, whereas the
overestimation of PM2.5 at the STN sites by the ARW-CMAQ results from
the overestimations of SO42−, NO3−, and NH4+.
The Comparison with WP-3 aircraft measurements reveals that both ARW-CMAQ
and NMM-CMAQ have very similar model performance for vertical profiles
for PM2.5 chemical components (SO42−,
NH4+) and related gaseous species (HNO3, SO2,
NH3, isoprene, toluene, terpenes) as both models used the same chemical
mechanisms and emissions. The results of ship along the coast of
southeastern Texas over the Gulf of Mexico show that both models captured
the temporal variations and broad synoptic change seen in the observed HCHO
and acetaldehyde with the means NMB <30% most of the time but they
consistently underestimated terpenes, isoprene, toluene and SO2. |
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