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| Titel |
Sensitivity of Global Modeling Initiative chemistry and transport model simulations of radon-222 and lead-210 to input meteorological data |
| VerfasserIn |
D. B. Considine, D. J. Bergmann, H. Liu |
| 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 ; 5, no. 12 ; Nr. 5, no. 12 (2005-12-16), S.3389-3406 |
| Datensatznummer |
250003200
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| Publikation (Nr.) |
 copernicus.org/acp-5-3389-2005.pdf |
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| Zusammenfassung |
| We have used the Global Modeling Initiative chemistry and transport model to
simulate the radionuclides radon-222 and lead-210 using three different sets
of input meteorological information: 1. Output from the Goddard Space Flight
Center Global Modeling and Assimilation Office GEOS-STRAT assimilation; 2.
Output from the Goddard Institute for Space Studies GISS II' general
circulation model; and 3. Output from the National Center for Atmospheric
Research MACCM3 general circulation model. We intercompare these simulations
with observations to determine the variability resulting from the different
meteorological data used to drive the model, and to assess the agreement of
the simulations with observations at the surface and in the upper
troposphere/lower stratosphere region. The observational datasets we use are
primarily climatologies developed from multiple years of observations. In
the upper troposphere/lower stratosphere region, climatological
distributions of lead-210 were constructed from ~25 years of aircraft
and balloon observations compiled into the US Environmental Measurements
Laboratory RANDAB database. Taken as a whole, no simulation stands out as
superior to the others. However, the simulation driven by the NCAR MACCM3
meteorological data compares better with lead-210 observations in the upper
troposphere/lower stratosphere region. Comparisons of simulations made with
and without convection show that the role played by convective transport and
scavenging in the three simulations differs substantially. These differences
may have implications for evaluation of the importance of very short-lived
halogen-containing species on stratospheric halogen budgets. |
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