Jeffrey Walker
•Observational Data Sets
•NCAR Northern Hemisphere Sea Level Pressure
• 01/1899 –
present; 5 x 5 degrees
•Climate Research Unit (University of East Anglia) Temperature and Precipitation
•01/01 - 12/98; 0.5 x 0.5 degrees
•Center for Climatic Research (University of Delaware) Terrestrial Temperature and Precipitation
•01/50 - 12/96 ; 0.5 x 0.5 degree
•Global Precipitation Climatology Project
(GPCP)
•01/86 - 03/95; 2.5 x 2.5 degree
•Langley Eight Year Shortwave and Longwave Surface Radiation Budget
•07/83 - 06/91 - in process of being extended; 2.5 x 2.5 degree
•Re-Analysis Atmospheric Forcing Data Sets
•ECMWF Re-analysis Advanced Global
Data
• 4x/day, 01/79 - 12/93
•1.125 degrees
(Gaussian)
•NCEP/NCAR Re-analysis
•4x/day, 01/48 – 12/99
•2.5 x 2.5 degrees
•Bias Correct Using Monthly Mean Observational Data Sets
Berg,
Famiglietti, Walker and Houser, AMS 2001
Bias Reduced Forcing