Estimating High Latitude Carbon Fluxes With Inversions Of Atmospheric CO2 |
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Authors: | Roger Dargaville David Baker Christian Rödenbeck Peter Rayner Philippe Ciais |
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Institution: | (1) Laboratoire des Sciences du Climat et de l'Environnement, Paris, France;(2) National Center for Atmospheric Research, Boulder, Colorado, USA;(3) Max-Planck-Institut für Biogeochemie, Jena, Germany;(4) Present address: Climpact, University of Pierre and Marie Curie, IOC UNESCO, Paris, France |
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Abstract: | Atmospheric inversions have proven to be useful tools, showing for example the likely existence of a large terrestrial carbon
sink in the northern mid-latitudes. However, as we go to smaller spatial scales the uncertainties in the inversions increase
rapidly, and the task of finding the distribution of the sink between North America, Europe and Asia has been shown to be
very difficult. The uncertainty in the fluxes due to network selection, transport model error and inversion set up tends to
be too high for studying either net annual fluxes or interannual variability on spatial scales such as the North American
Boreal or Eurasian Boreal regions. We discuss the path forward; to couple together the atmospheric inversions with process
based terrestrial carbon models, creating carbon data assimilation systems. Such systems are being developed now and could
prove to be very powerful. The multi-disciplinary nature of the data assimilation system requires information from flux towers,
soil and above ground biomass inventories, remote sensed fields, atmospheric CO2 concentrations and climate data as well as model development and will need a massive community effort if it will succeed. |
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Keywords: | :" target="_blank">: Global carbon cycle atmospheric inversions Boreal ecosystems |
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