Dear Rob,

The International Atomic Energy Agency (IAEA) and the World Meteorological
Organization have a homepage at:

        www.iaea.or.at/programs/ri/gnip/gnipmain.htm

from which one can download data sets of d18O values of precipitation for
various stations around the globe.  They are limited and in some cases the
records are spotty or of short duration.  There is a map from which you can
select your area.  The data sets can be downloaded in either ASCII or Lotus
format.

Good luck.

Eileen

Department of Geological Sciences       Internet:  [log in to unmask]
University of South Carolina            Office:  (803) 777-4526
Columbia, SC 29208                      FAX: (803) 777-6610