Please direct any question about this data set to Jennifer Logan,
jal@io.harvard.edu, 617-495-4582.  Send an e-mail to jal@io.harvard.edu if
you download any of these data.  You will be informed of any updates.

Please read all the README files.

The data given here are described in two papers:

J. A. Logan, An analysis of ozonesonde data for the troposphere:
Recommendations for testing 3-D models, and development of a gridded
climatology for tropospheric ozone, J. Geophys. Res. 104, 16,115-16,149,
1999.

J. A. Logan, An analysis of ozonesonde data for the lower stratosphere:
Recommendations for testing models, J. Geophys. Res., 104, 16,151-16,170,
1999.


DIRECTORY STRUCTURE

This directory is pub/sonde

sonde/profiles   contains the files with the ozonesonde data at 22
                 standard pressure levels, as documented in README.data.

sonde/clim     contains the ozone climatology:  NB REVISED, December, 1998.

sonde/tropp    contains files with ozonesonde data given relative to the 
               tropopause height.

sonde/surface  contains files for many of the surface sites shown in the
               fiirst paper given above.  

These data may be accessed by anonymous ftp, and obtained using the mget
command.

ftp ftp.as.harvard.edu
log on as anonymous
give your e-mail address as password

cd pub/sonde

cd to the desired directory, and use the mget command to get the files.
If you type "prompt" (return)
before mget, you will not be queried about each file.

If any of the sonde data or the climatology are used in a publication or
presentation, cite the above papers for the source of the data.  For the
surface data, cite the original papers as decribed in sonde/surface.