"This data set contains monthly means of meteorological observation
data from Russian stations from 1961-2000 (for most stations). The
Russian station observations were provided by Vladimir Radionov,
Arctic and Antarctic Research Institute (AARI), St. Petersburg, and
include 2-meter air temperature, sea level pressure, total and low
cloud amount, precipitation, and relative humidity. Data are
available in ASCII text format via FTP.", quoted from NSIDC site.
The data files and associated documentation were downloaded to this
DSS site in January 2007. See the dataset documentation
[http://rda.ucar.edu/datasets/ds489.0/#!docs] for more information.