PCN REANALYSIS DATA
The Reanalysis data section of the PCN provides the NCEP/NCAR 2.5° x 2.5° gridded temperature reanalysis data sets at seasonal and annual time 
resolution, in netCDF and text format. Seasonal or annual means, or anomalies from the 1961 AD - 1990 AD base period, are provided, including 
both meteorological and calendar seasonal averages. The files are formatted alternatively with grids beginning at either the prime meridian or 180°W.

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 (1948 onwards) 
and as well to produce analyses of the current atmospheric state.

Download PCN REANALYSIS data from the NOAA/WDC Paleo archive:
The full PCN Data Description and Format is located here: ftp://ftp.ncdc.noaa.gov/pub/data/paleo/reconstructions/pcn/readme-pcn.txt

NCEP Reanalysis Mean Annual Air Temperature:
Annual Mean Air Temperature, grid structure 0°E - 2.5°W, Text or netCDF
Annual Mean Air Temperature, grid structure 180°W - 177.5°E, Text or netCDF
Annual Mean Air Temperature Anomalies, grid structure 0°E - 2.5°W, Text or netCDF
Annual Mean Air Temperature Anomalies, grid structure 180°W - 177.5°E, Text or netCDF

NCEP Reanalysis Seasonal Mean Air Temperature:
Winter:
Mean Air Temperature, Calendar Winter (JFM), grid structure 0°E - 2.5°W, Text or netCDF
Mean Air Temperature, Calendar Winter (JFM), grid structure 180°W - 177.5°E, Text or netCDF
Mean Air Temperature Anomalies, Calendar Winter (JFM), grid structure 0°E - 2.5°W, Text or netCDF
Mean Air Temperature Anomalies, Calendar Winter (JFM), grid structure 180°W - 177.5°E, Text or netCDF
Mean Air Temperature, Meteorological Winter (DJF), grid structure 0°E - 2.5°W, Text or netCDF
Mean Air Temperature, Meteorological Winter (DJF), grid structure 180°W - 177.5°E, Text or netCDF
Mean Air Temperature Anomalies, Meteorological Winter (DJF), grid structure 0°E - 2.5°W, Text or netCDF
Mean Air Temperature Anomalies, Meteorological Winter (DJF), grid structure 180°W - 177.5°E, Text or netCDF
Spring:
Mean Air Temperature, Calendar Spring (AMJ), grid structure 0°E - 2.5°W, Text or netCDF
Mean Air Temperature, Calendar Spring (AMJ), grid structure 180°W - 177.5°E, Text or netCDF
Mean Air Temperature Anomalies, Calendar Spring (AMJ), grid structure 0°E - 2.5°W, Text or netCDF
Mean Air Temperature Anomalies, Calendar Spring (AMJ), grid structure 180°W - 177.5°E, Text or netCDF
Mean Air Temperature, Meteorological Spring (MAM), grid structure 0°E - 2.5°W, Text or netCDF
Mean Air Temperature, Meteorological Spring (MAM), grid structure 180°W - 177.5°E, Text or netCDF
Mean Air Temperature Anomalies, Meteorological Spring (MAM), grid structure 0°E - 2.5°W, Text or netCDF
Mean Air Temperature Anomalies, Meteorological Spring (MAM), grid structure 180°W - 177.5°E, Text or netCDF
Summer:
Mean Air Temperature, Calendar Summer (JAS), grid structure 0°E - 2.5°W, Text or netCDF
Mean Air Temperature, Calendar Summer (JAS), grid structure 180°W - 177.5°E, Text or netCDF
Mean Air Temperature Anomalies, Calendar Summer (JAS), grid structure 0°E - 2.5°W, Text or netCDF
Mean Air Temperature Anomalies, Calendar Summer (JAS), grid structure 180°W - 177.5°E, Text or netCDF
Mean Air Temperature, Meteorological Summer (JJA), grid structure 0°E - 2.5°W, Text or netCDF
Mean Air Temperature, Meteorological Summer (JJA), grid structure 180°W - 177.5°E, Text or netCDF
Mean Air Temperature Anomalies, Meteorological Summer (JJA), grid structure 0°E - 2.5°W, Text or netCDF
Mean Air Temperature Anomalies, Meteorological Summer (JJA), grid structure 180°W - 177.5°E, Text or netCDF
Autumn:
Mean Air Temperature, Calendar Autumn (OND), grid structure 0°E - 2.5°W, Text or netCDF
Mean Air Temperature, Calendar Autumn (OND), grid structure 180°W - 177.5°E, Text or netCDF
Mean Air Temperature Anomalies, Calendar Autumn (OND), grid structure 0°E - 2.5°W, Text or netCDF
Mean Air Temperature Anomalies, Calendar Autumn (OND), grid structure 180°W - 177.5°E, Text or netCDF
Mean Air Temperature, Meteorological Autumn (SON), grid structure 0°E - 2.5°W, Text or netCDF
Mean Air Temperature, Meteorological Autumn (SON), grid structure 180°W - 177.5°E, Text or netCDF
Mean Air Temperature Anomalies, Meteorological Autumn (SON), grid structure 0°E - 2.5°W, Text or netCDF
Mean Air Temperature Anomalies, Meteorological Autumn (SON), grid structure 180°W - 177.5°E, Text or netCDF

Citation for Data Source:
Kalnay et al. 1996. The NCEP/NCAR 40-year reanalysis project, Bull. Amer. Meteor. Soc., 77, 437-470

For more information, see the NOAA/ESRL/PSD NCEP/NCAR Reanalysis Project page: http://www.esrl.noaa.gov/psd/data/reanalysis/reanalysis.shtml