NCEP/NCAR Reanalysis Data, Sea-Level Pressure (NCEP_RE/sea_level_pressure)

The NCEP/NCAR Reanalysis Project is a joint project between the National
Centers for Environmental Prediction (NCEP, formerly “NMC”) and the
National Center for Atmospheric Research (NCAR). The goal of this joint
effort is to produce new atmospheric analyses using historical data as
well as to produce analyses of the current atmospheric state (Climate Data
Assimilation System, CDAS). The NCEP/NCAR Reanalysis 1 project is using a
state-of-the-art analysis/forecast system to perform data assimilation using
past data from 1948 to the present. The data have 6-hour temporal
resolution (0000, 0600, 1200, and 1800 UTC) and 2.5 degree spatial
resolution.