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@ARTICLE{Inness:275995,
      author       = {Inness, A. and Blechschmidt, A.-M. and Bouarar, I. and
                      Chabrillat, S. and Crepulja, M. and Engelen, R. J. and
                      Eskes, H. and Flemming, J. and Gaudel, A. and Hendrick, F.
                      and Huijnen, V. and Jones, L. and Kapsomenakis, J. and
                      Katragkou, E. and Keppens, A. and Langerock, B. and de
                      Mazière, M. and Melas, D. and Parrington, M. and Peuch, V.
                      H. and Razinger, M. and Richter, A. and Schultz, Martin and
                      Suttie, M. and Thouret, V. and Vrekoussis, M. and Wagner, A.
                      and Zerefos, C.},
      title        = {{D}ata assimilation of satellite-retrieved ozone, carbon
                      monoxide and nitrogen dioxide with {ECMWF}'s
                      {C}omposition-{IFS}},
      journal      = {Atmospheric chemistry and physics},
      volume       = {15},
      number       = {9},
      issn         = {1680-7324},
      address      = {Katlenburg-Lindau},
      publisher    = {EGU},
      reportid     = {FZJ-2015-06493},
      pages        = {5275 - 5303},
      year         = {2015},
      abstract     = {Daily global analyses and 5-day forecasts are generated in
                      the context of the European Monitoring Atmospheric
                      Composition and Climate (MACC) project using an extended
                      version of the Integrated Forecasting System (IFS) of the
                      European Centre for Medium-Range Weather Forecasts (ECMWF).
                      The IFS now includes modules for chemistry, deposition and
                      emission of reactive gases, aerosols, and greenhouse gases,
                      and the 4-dimensional variational data assimilation scheme
                      makes use of multiple satellite observations of atmospheric
                      composition in addition to meteorological observations. This
                      paper describes the data assimilation setup of the new
                      Composition-IFS (C-IFS) with respect to reactive gases and
                      validates analysis fields of ozone (O3), carbon monoxide
                      (CO), and nitrogen dioxide (NO2) for the year 2008 against
                      independent observations and a control run without data
                      assimilation. The largest improvement in CO by assimilation
                      of Measurements of Pollution in the Troposphere (MOPITT) CO
                      columns is seen in the lower troposphere of the Northern
                      Hemisphere (NH) extratropics during winter, and during the
                      South African biomass-burning season. The assimilation of
                      several O3 total column and stratospheric profile retrievals
                      greatly improves the total column, stratospheric and upper
                      tropospheric O3 analysis fields relative to the control run.
                      The impact on lower tropospheric ozone, which comes from the
                      residual of the total column and stratospheric profile O3
                      data, is smaller, but nevertheless there is some improvement
                      particularly in the NH during winter and spring. The impact
                      of the assimilation of tropospheric NO2 columns from the
                      Ozone Monitoring Instrument (OMI) is small because of the
                      short lifetime of NO2, suggesting that NO2 observations
                      would be better used to adjust emissions instead of initial
                      conditions. The results further indicate that the quality of
                      the tropospheric analyses and of the stratospheric ozone
                      analysis obtained with the C-IFS system has improved
                      compared to the previous "coupled" model system of MACC.},
      cin          = {IEK-8},
      ddc          = {550},
      cid          = {I:(DE-Juel1)IEK-8-20101013},
      pnm          = {243 - Tropospheric trace substances and their
                      transformation processes (POF3-243) / MACC-III - Monitoring
                      Atmospheric Composition and Climate -III (633080) / MACC II
                      - Monitoring Atmospheric Composition and Climate Interim
                      Implementation (283576)},
      pid          = {G:(DE-HGF)POF3-243 / G:(EU-Grant)633080 /
                      G:(EU-Grant)283576},
      typ          = {PUB:(DE-HGF)16},
      UT           = {WOS:000355289100019},
      doi          = {10.5194/acp-15-5275-2015},
      url          = {https://juser.fz-juelich.de/record/275995},
}