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2013JD019592ps01.epsPS document1714KInferred “delta”-CO2 correlation length and variance parameters for January (A and C) and June (B and D). The covariance parameters are shown for the 15th day of the month, 1800 h UTC at ~45 hPa (i.e., ~20.0 km).
2013JD019592ps02.epsPS document2202KCO2 concentrations from the 4D-VAR analyses based on the two background error statistics—“delta”-statistics (A and B), NMC statistics (C and D), and the unconstrained model run (E and F) for January and June 2010. These plots are shown for the 15th day of the month, 1800 h UTC at ~45 hPa (i.e., ~20.0 km).
2013JD019592ps03.epsPS document2271KColumn-averaged CO2 mixing ratio analysis increments based on the two background error statistics—“delta”-statistics (panel A), and NMC-based statistics (panel B), averaged over the month of June 2010. As described in Fisher [2002], within the ECMWF 4D-VAR system these analysis increments are calculated using the differences between the observations and the model background (short forecast), the observation errors and the background errors.
2013JD019592_ManuscriptSupplementaryMaterials.docxWord document764KSupporting information
2013JD019592_Readme.docxWord document12KSupporting information

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