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Ocean biogeochemistry in the Community Earth System Model

  • Room 112, O&M Building (map)


The Community Earth System Model (CESM) is a state-of-the-art climate model consisting of coupled atmosphere-ocean general circulation models (GCMs) and including land surface, sea ice, and recently land-ice component models.  The CESM represents processes relevant to the global carbon cycle, including the lower trophic levels of marine ecosystems.  The coupled GCMs spontaneously generate internal variability representative of the real climate system, and are forced with historical and future-scenario data sets defining anthropogenic effects, thus providing a powerful means of examining mechanisms by which climate variability and change impact ocean biogeochemistry.  In this talk I provide an overview of the CESM modeling framework and its application to questions about climate variability and change on interannual to centennial timescales.  I focus on the problem of oceanic deoxygenation, and demonstrate how natural climate variability impacts detection of anthropogenically forced trends