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| Titel |
Error characterization of CO2 vertical mixing in the atmospheric transport model WRF-VPRM |
| VerfasserIn |
R. Kretschmer, C. Gerbig, U. Karstens, F.-T. Koch |
| 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. 5 ; Nr. 12, no. 5 (2012-03-05), S.2441-2458 |
| Datensatznummer |
250010854
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| Publikation (Nr.) |
 copernicus.org/acp-12-2441-2012.pdf |
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| Zusammenfassung |
| One of the dominant uncertainties in inverse estimates of regional CO2
surface-atmosphere fluxes is related to model errors in vertical transport
within the planetary boundary layer (PBL). In this study we present the
results from a synthetic experiment using the atmospheric model WRF-VPRM to
realistically simulate transport of CO2 for large parts of the European
continent at 10 km spatial resolution. To elucidate the impact of vertical
mixing error on modeled CO2 mixing ratios we simulated a month during
the growing season (August 2006) with different commonly used
parameterizations of the PBL (Mellor-Yamada-Janjić (MYJ) and
Yonsei-University (YSU) scheme). To isolate the effect of transport errors we
prescribed the same CO2 surface fluxes for both simulations. Differences
in simulated CO2 mixing ratios (model bias) were on the order of 3 ppm
during daytime with larger values at night. We present a simple method to
reduce this bias by 70–80% when the true height of the mixed layer is
known. |
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