TY - RPRT
AU - Marta Janiskova
AB - 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.
BT - WP-3200 Report: ESA ESTEC Contract AO/I-6441/10/NL/CB
C1 - Research
CY - Shinfield Park, Reading
DA - 01/2014
LA - eng
M1 - 2014:WP-3200
N2 - 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.
PB - ECMWF
PP - Shinfield Park, Reading
PY - 2014
T2 - WP-3200 Report: ESA ESTEC Contract AO/I-6441/10/NL/CB
T3 - ESA Contract Report
TI - Assimilation experiments for radar and lidar. Support-to-Science-Element (STSE) Study EarthCARE Assimilation
ER -