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| Titel |
Comparing high resolution WRF-VPRM simulations and two global CO2 transport models with coastal tower measurements of CO2 |
| VerfasserIn |
R. Ahmadov, C. Gerbig, R. Kretschmer, S. Körner, C. Rödenbeck, P. Bousquet, M. Ramonet |
| Medientyp |
Artikel
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| Sprache |
Englisch
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| ISSN |
1726-4170
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| Digitales Dokument |
URL |
| Erschienen |
In: Biogeosciences ; 6, no. 5 ; Nr. 6, no. 5 (2009-05-15), S.807-817 |
| Datensatznummer |
250003744
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| Publikation (Nr.) |
 copernicus.org/bg-6-807-2009.pdf |
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| Zusammenfassung |
| In order to better understand the effects that mesoscale transport has on
atmospheric CO2 distributions, we have used the atmospheric WRF model
coupled to the diagnostic biospheric model VPRM, which provides high
resolution biospheric CO2 fluxes based on MODIS satellite indices. We
have run WRF-VPRM for the period from 16 May to 15 June in 2005 covering the
intensive period of the CERES experiment, using the CO2 fields from the
global model LMDZ for initialization and lateral boundary conditions. The
comparison of modeled CO2 concentration time series against
observations at the Biscarosse tower and against output from two global
models – LMDZ and TM3 – clearly reveals that WRF-VPRM can capture the
measured CO2 signal much better than the global models with lower
resolution. Also the diurnal variability of the atmospheric CO2 field
caused by recirculation of nighttime respired CO2 is simulated by
WRF-VRPM reasonably well. Analysis of the nighttime data indicates that with
high resolution modeling tools such as WRF-VPRM a large fraction of the time
periods that are impossible to utilize in global models, can be used
quantitatively and may help to constrain respiratory fluxes. The paper
concludes that we need to utilize a high-resolution model such as WRF-VPRM
to use continental observations of CO2 concentration data with more
spatial and temporal coverage and to link them to the global inversion
models. |
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