Articles | Volume 9, issue 14
Atmos. Chem. Phys., 9, 5331–5342, 2009
https://doi.org/10.5194/acp-9-5331-2009
Atmos. Chem. Phys., 9, 5331–5342, 2009
https://doi.org/10.5194/acp-9-5331-2009

  29 Jul 2009

29 Jul 2009

A two-step scheme for high-resolution regional atmospheric trace gas inversions based on independent models

C. Rödenbeck, C. Gerbig, K. Trusilova, and M. Heimann C. Rödenbeck et al.
  • Max Planck Institute for Biogeochemistry, Postfach 100164, 07701 Jena, Germany

Abstract. Mixing ratio measurements of atmospheric tracers like CO2 can be used to estimate regional surface-air tracer fluxes using inverse methods, involving a numerical transport model. Currently available transport models are either global but rather coarse, or more accurate but only over a limited spatial and temporal domain. To obtain higher-resolution flux estimates within a region of interest, existing studies use zoomed or coupled models. The two-step scheme developed here uses global and regional models sequentially in separate inversion steps, coupled only via the data vector. This provides a nested atmospheric inversion scheme without the necessity of a direct coupled model implementation. For example, the scheme allows an easy nesting of Lagrangian models with their potential of very high resolution into global inversions based on Eulerian models.

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