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  TransCom 3 CO2 inversion intercomparison: 1. Annual mean control results and sensitivity to transport and prior flux information

Gurney, K. R., Law, R. M., Denning, A. S., Rayner, P. J., Baker, D., Bousquet, P., et al. (2003). TransCom 3 CO2 inversion intercomparison: 1. Annual mean control results and sensitivity to transport and prior flux information. Tellus, Series B - Chemical and Physical Meteorology, 55(2), 555-579. doi:10.1034/j.1600-0889.2003.00049.x.

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http://dx.doi.org/10.1034/j.1600-0889.2003.00049.x (Verlagsversion)
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Gurney, K. R., Autor
Law, R. M., Autor
Denning, A. S., Autor
Rayner, P. J., Autor
Baker, D., Autor
Bousquet, P., Autor
Bruhwiler, L., Autor
Chen, Y.-H., Autor
Ciais, P., Autor
Fan, S. M., Autor
Fung, I. Y., Autor
Gloor, M.1, Autor           
Heimann, M.2, Autor           
Higuchi, K., Autor
John, J., Autor
Kowalczyk, E., Autor
Maki, T., Autor
Maksyutov, S., Autor
Peylin, P., Autor
Prather, M., Autor
Pak, B. C., AutorSarmiento, J., AutorTaguchi, S., AutorTakahashi, T., AutorYuen, C.-W., Autor mehr..
Affiliations:
1Tall Tower Atmospheric Gas Measurements, Dr. J. Lavrič, Department Biogeochemical Systems, Prof. M. Heimann, Max Planck Institute for Biogeochemistry, Max Planck Society, ou_1497786              
2Department Biogeochemical Systems, Prof. M. Heimann, Max Planck Institute for Biogeochemistry, Max Planck Society, ou_1497755              

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Schlagwörter: General-circulation model; atmospheric CO2; carbon-dioxide; boundary-layer; cumulus parameterization; tracer; sinks; simulation; surface; scale
 Zusammenfassung: Spatial and temporal variations of atmospheric CO2 concentrations contain information about surface sources and sinks, which can be quantitatively interpreted through tracer transport inversion. Previous CO2 inversion calculations obtained differing results due to different data, methods and transport models used. To isolate the sources of uncertainty, we have conducted a set of annual mean inversion experiments in which 17 different transport models or model variants were used to calculate regional carbon sources and sinks from the same data with a standardized method. Simulated transport is a significant source of uncertainty in these calculations, particularly in the response to prescribed "background" fluxes due to fossil fuel combustion, a balanced terrestrial biosphere, and air-sea gas exchange. Individual model-estimated fluxes are often a direct reflection of their response to these background fluxes. Models that generate strong surface maxima near background exchange locations tend to require larger uptake near those locations. Models with weak surface maxima tend to have less uptake in those same regions but may infer small sources downwind. In some cases, individual model flux estimates cannot be analyzed through simple relationships to background flux responses but are likely due to local transport differences or particular responses at individual CO2 observing locations. The response to the background biosphere exchange generates the greatest variation in the estimated fluxes, particularly over land in the Northern Hemisphere. More observational data in the tropical regions may help in both lowering the uncertain tropical land flux uncertainties and constraining the northern land estimates because of compensation between these two broad regions in the inversion. More optimistically, examination of the model-mean retrieved fluxes indicates a general insensitivity to the prior fluxes and the prior flux uncertainties. Less uptake in the Southern Ocean than implied by oceanographic observations, and an evenly distributed northern land sink, remain in spite of changes in this aspect of the inversion setup.

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 Datum: 2003
 Publikationsstatus: Erschienen
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 Identifikatoren: Anderer: BGC0597
DOI: 10.1034/j.1600-0889.2003.00049.x
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Titel: Tellus, Series B - Chemical and Physical Meteorology
Genre der Quelle: Zeitschrift
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Ort, Verlag, Ausgabe: Copenhagen : Swedish Geophysical Society :
Seiten: - Band / Heft: 55 (2) Artikelnummer: - Start- / Endseite: 555 - 579 Identifikator: CoNE: https://pure.mpg.de/cone/journals/resource/954925506308
ISSN: 0280-6509