Additional information about these datasets may be found in:

NCAR Tech Note TN-373, "Global Analyses from ECMWF and Atlas of 1000 to 10 mb
Circulation Statistics", Trenberth

NCAR Tech Note TN-301, "Intercomparison of NMC and ECMWF Global Analyses: 1980
- 1986", Trenberth and Olson

NCAR Tech Note TN-338+, "A Global Ocean Wind Stress Climatology Based on ECMWF Analyses", Trenberth, Olson and Large