An OSSE-based evaluation of 4D-Ensemble-Var (and hybrid variants) for the NCEP GFS Daryl Kleist1,2 and Kayo Ide2 * CMOS 2012 Congress AMS 21st NWP and 25th WAF Conferences…

GSI-based Hybrid Data Assimilation: Practical Implementation and impact on the NCEP GFS Daryl Kleist Environmental Modeling Center NOAA/NWS/NCEP With acknowledgements to…

GSI Tutorial 2011 Background and Observation Errors: Estimation and Tuning Daryl Kleist NCEP/EMC 29-30 June 2011 * GSI Tutorial GSI Tutorial Background Errors Background…

An OSSE-based evaluation of 4D-Ensemble-Var (and hybrid variants) for the NCEP GFS Daryl Kleist1,2 and Kayo Ide2 * CMOS 2012 Congress AMS 21st NWP and 25th WAF Conferences…

Hybrid variational-ensemble data assimilation at NCEP 1 GSI-based hybrid variation-ensemble data assimilation for the NCEP GFS Daryl T. Kleist GSI Community Workshop 28 June…

GSI Hybrid EnKF-3DVAR Upgrade Components GPS RO bending angle rather than refractivity Inclusion of compressibility factors for atmosphere Retune SBUV ob errors â fix bug…

Structure and Phase Error Correction of the First Guess with Hybrid 3DV-Ensemble Analysis A description of the tangent linear normal mode constraint (TLNMC) in GSI David…

Running Global Model Parallel Experiments Data Assimilation Andrew Collard 1 Overview Introduction to Atmospheric Data Assimilation Control Variables Observations Background…