@manual{74994,
  author = {Marta Janiskova},
  title = {Assimilation experiments for radar and lidar. Support-to-Science-Element (STSE) Study EarthCARE Assimilation},
  abstract = {1D-Var assimilation experiments have been performed using observations of cloud radar reflectivity and lidar backscatter, either separately or in combination. Information on temperature and specific humidity retrieved from 1D-Var was used as pseudo-observations in the 4D-Var system. Obtained results indicate that 1D-Var analyses get closer to assimilated and also independent observations. However, impact of the cloud radar reflectivity is larger than that of the lidar backscatter. 1D+4D-Var analysis reduces analysis departures for q pseudo-observations and provides analysis departures closer to T pseudo-observations than would be obtained if temperature pseudo-observations were not assimilated. Impact on the first-guess and analysis departure statistics when verified against other observation types assimilated in 4D-Var is small. The performed 1D+4D-Var assimilation experiments also suggest a positive impact of the new observations on the subsequent forecast.},
  year = {2014},
  journal = {WP-3200 Report: ESA ESTEC Contract AO/I-6441/10/NL/CB},
  number = {2014:WP-3200},
  month = {01/2014},
  publisher = {ECMWF},
  address = {Shinfield Park, Reading},
  language = {eng},
}