Journal article
A European summertime CO2 biogenic flux inversion at mesoscale from continuous in situ mixing ratio measurements
G Broquet, F Chevallier, P Rayner, C Aulagnier, I Pison, M Ramonet, M Schmidt, AT Vermeulen, P Ciais
Journal of Geophysical Research Atmospheres | Published : 2011
DOI: 10.1029/2011JD016202
Abstract
A regional variational inverse modeling system for the estimation of European biogenic CO2 fluxes is presented. This system is based on a 50 km horizontal resolution configuration of a mesoscale atmospheric transport model and on the adjoint of its tracer transport code. It exploits hourly CO2 in situ data from 15 CarboEurope-Integrated Project stations. Particular attention in the inversion setup is paid to characterizing the transport model error and to selecting the observations to be assimilated as a function of this error. Comparisons between simulations and data of CO 2 and 222Rn concentrations indicate that the model errors should have a standard deviation which is less than 7 ppm whe..
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Awarded by European Commission
Funding Acknowledgements
We would like to thank Philippe Peylin, Nicolas Viovy, Philippe Bousquet and Leonard Rivier, who have provided simulations of ORCHIDEE, LMDZ and MM5, and the anthropogenic emission product. We also thank all the principal investigators and scientists of the CarboEurope-Integrated Project who have provided the data used in this paper, and in particular Ingeborg Levin (Universitat Heidelberg), Attilio Di Diodato and Marco Alemanno (Servizio meteorologico dell' Aeronautica Militare Italiana), Laszlo Haszpra (Hungarian Meteorological Service), Markus Leuenberger (Universitat Bern), Alcide Di Sarra and Salvatore Piacentino (Agenzia nazionale per le nuove tecnologie, l'energia e lo sviluppo economico sostenibile), Josep-Anton Morgui (Universitat de Barcelona), Jost Valentin Lavric (Max-Planck-Institute for Biogeochemistry), Francesco Apadula (Research on Energy Systems) and Frank Meinhardt (Umwelt Bundes Amt). The setup of CarboEurope atmospheric measurements was also supported by the CHIOTTO project and the Max-Planck-Society. We thank the custodians of the International Foundation High Altitude Research Stations Jungfraujoch and Gornergrat (HFSJG) for their help with the continuous CO<INF>2</INF> measurements at Jungfraujoch. The L4 eddy covariance data have been downloaded from http://gaia.agraria.unitus.it/database/carboeuropeip/. We thank Dario Pappale and the scientists involved in the setup of this database. This study was co-funded by the European Commission under the EU Seventh Research Framework Programme (grant agreement 218793, MACC). Peter Rayner is in receipt of an ARC Professorial Fellowship (DP1096309).