A Comparison of the Impacts of Radiosonde and AMSU Radiance Observations in GSI Based 3DEnsVar and 3DVar Data Assimilation Systems for NCEP GFS

Table 1

List of experiments.

Experiment	Description
GSI3DVar	GSI3DVar control experiment which assimilates all observations in NCEP’s operational data stream
GSI3DVar-NoRAOB	The same as GSI3DVar experiment except denying Radiosonde observations
GSI3DVar-NoAMSU	GSI experiment which denies AMSU observations from operational data set
3DEnsVar	Hybrid control experiment which assimilates all conventional and satellite observations in NCEP’s data stream
3DEnsVar-NoRAOB	Hybrid experiment which denies Radiosonde observations from operational data set
3DEnsVar-NoAMSU	Hybrid experiment which denies AMSU observations from operational data set