DSS presents a surface subset of the Global Final (FNL) Analyses on a pair of 2.5x2.5 degree hemispheric grids, every twelve hours. These were operationally prepared by NCEP. The NCAR documents Information about NMC Analysis and Forecast Models and History of Changes in the NMC Analysis Techniques discuss model features and changes.

The analyses are available on the surface, at 1000mb and a boundary layer. This subset was prepared by DSS from the analyses in DS082.0. Parameters include surface pressure, sea level pressure, geopotential height, temperature, sea surface temperature, potential temperature, relative humidity, snow depth (weekly, Northern Hemisphere only), and u- and v-winds.

This dataset is in the binary NMC Office Note 84 (ON84) format. MORE

Unless you have a special interest in this dataset, DSS recommends that you use one of our reanalysis datasets, such as ds090.0. That's because those are based on a more complete collection of observations, improved analysis methods, and are provided in a common modern format (GRIB).