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| Titel |
Net sea–air CO2 flux uncertainties in the Bay of Biscay based on the choice of wind speed products and gas transfer parameterizations |
| VerfasserIn |
P. Otero, X. A. Padin, M. Ruiz-Villarreal, L. M. García-García, A. F. Ríos, F. F. Pérez |
| 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 ; 10, no. 5 ; Nr. 10, no. 5 (2013-05-03), S.2993-3005 |
| Datensatznummer |
250018234
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| Publikation (Nr.) |
 copernicus.org/bg-10-2993-2013.pdf |
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| Zusammenfassung |
| The estimation of sea–air CO2 fluxes is largely dependent on wind
speed through the gas transfer velocity parameterization. In this paper, we
quantify uncertainties in the estimation of the CO2 uptake in the Bay
of Biscay resulting from the use of different sources of wind speed such as three
different global reanalysis meteorological models (NCEP/NCAR 1, NCEP/DOE 2
and ERA-Interim), one high-resolution regional forecast model
(HIRLAM-AEMet), winds derived under the Cross-Calibrated Multi-Platform
(CCMP) project, and QuikSCAT winds in combination with some of the most
widely used gas transfer velocity parameterizations. Results show that net
CO2 flux estimations during an entire seasonal cycle
(September 2002–September 2003) may vary by a factor of ~ 3 depending on the selected
wind speed product and the gas exchange parameterization, with the highest
impact due to the last one. The comparison of satellite- and model-derived
winds with observations at buoys advises against the systematic
overestimation of NCEP-2 and the underestimation of NCEP-1. In the coastal
region, the presence of land and the time resolution are the main constraints
of QuikSCAT, which turns CCMP and ERA-Interim in the preferred options. |
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