HR: 09:30h
AN: A51B-07    [PDF]
TI: Inverse Modeling of CO$_2$ Sources and Sinks Using Satellite Data: A Synthetic Inter-comparison of Measurement Techniques and Their Performance as a Function of Space and Time
AU: * Houweling, S
EM: s.houweling@phys.uu.nl
AF: National Institute for Space Research (SRON), Sorbonnelaan 2, Utrecht, 3584 CA Netherlands
AU: Breon, F
EM: fmbreon@cea.fr
AF: Laboratoire des Sciences du Climate et de l'Environnement, Bat 709, CE L'Orme des Merisiers, Gif sur Yvette, 91191 France
AU: Aben, I
EM: i.aben@sron.nl
AF: National Institute for Space Research (SRON), Sorbonnelaan 2, Utrecht, 3584 CA Netherlands
AU: Roedenbeck, C
EM: christian.roedenbeck@bgc-jena.mpg.de
AF: Max Planck Institute for Biogeochemistry, Winzerlaerstrasse 10, Jena, 07745 Germany
AU: Gloor, M
EM: mgloor@bgc-jena.mpg.de
AF: Max Planck Institute for Biogeochemistry, Winzerlaerstrasse 10, Jena, 07745 Germany
AU: Heimann, M
EM: martin.heimann@bgc-jena.mpg.de
AF: Max Planck Institute for Biogeochemistry, Winzerlaerstrasse 10, Jena, 07745 Germany
AU: Ciais, P
EM: ciais@prolix.saclay.cea.fr
AF: Laboratoire des Sciences du Climate et de l'Environnement, Bat 709, CE L'Orme des Merisiers, Gif sur Yvette, 91191 France
AB: Several measurement concepts have been proposed for measuring CO$_2$ from space. Currently, the AQUA and ENVISAT satellites are in orbit and the possibility to retrieve CO$_2$ from their instruments (AIRS and SCIAMACHY) is being investigated. Measurements from satellites in combination with inverse modeling techniques might lead to significantly improved CO2 flux estimates. We conducted synthetic inverse modeling experiments to investigate the expected performance of several measurement techniques including those used in AIRS, SCIAMACHY and the planned OCO mission. Our inverse modeling set-up solves for fluxes on a global domain and at a relatively high resolution (8x10 degree). This allows us to study the performance of the instruments as a function of temporal and spatial scale. Our results show characteristic strengths and weaknesses of the techniques that were tested, emphasizing the importance of a high measurement sensitivity to CO$_2$ near the surface and global coverage. An analysis will be presented of the scales that are resolved by the satellite measurements and how they compare with the current surface networks. We will address the issue of instrument precision requirements, and suggest realistic scientific aims of instruments that are in flight at present. Finally, we'll give recommendation for future research and discuss potentially promising new instrument concepts.
DE: 0322 Constituent sources and sinks
DE: 0365 Troposphere--composition and chemistry
DE: 1640 Remote sensing
DE: 3260 Inverse theory
SC: Atmospheric Sciences [A]
MN: 2003 Fall Meeting