This describes the contents of the n2o_*_theta.ascii files in this directory.
n2o_lat_theta.ascii contains N2O seasonal means binned by latitude and potential 
temperature. n2o_eqlat_theta.ascii contains the N2O seasonal means binned by 
equivalent latitude and potential temperature.

There are four seasons labelled: DJF (Dec-Jan-Feb)
                                 MAM (Mar-Apr-May)
                                 JJA (Jun-Jul-Aug)
                                 SON (Sep-Oct-Nov)

The latitude value is next to the season. Latitudes run from -72 to 88,
incremented by 2 degrees. Equivalent latitudes run from -90 to 90, also
incremented by 2 degrees. After the season and latitude are 5 lines
of N2O mixing ratios. These are the 35 potential temperature values,
running from 360 to 530 K, increments of 5 K. Missing values are '999.9'.

This worked is published in:
"Climatology and small-scale structure of lower stratospheric N2O based on
in situ observations", JGR, 104, 2195-2208, 1999. The post script files in
this directory are Plates 4 & 5 of that paper, which are color contour plots
of the data in the latitude and equivalent latitude coordinates.

The color post script files in this directory are for Plates 4 & 5 of that paper 
(seasonal mean N2O in latitude and in equivalent latitude).