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The CAM-Chem model has been interfaced to the Data Assimilation Research Testbed (DART) in order to assimilate both chemical and meteorological observations.

The In this case, the dataassimilationscheme isanEnsemble Adjustment Kalman Filter (EAKF).

This requires an ensemble (or multiple instances) of CAM-Chem simulations, which is currently done within the multi-instance feature of the CESM coupler.

A reanalysis of MOPITT Carbon Monoxide (2002-2013) has been performed (Gaubert et al., 2016; Gaubert et al., 2017) and monthly means outputs are available here.