Atmospheric CO2 input files
Author: Sara Fletcher 
Date: 2/14/2003

This directory contains the files needed to incorporate atmospheric
CO2 into the time-dependent inverse dye patterns.

splco2_mod.dat: This file contains a spline fit to ice core and Mauna Loa
observations of carbon dioxide in units of ppm from 1765-2001. The original OCMIP file splco2.dat was modified by incorporating more recent observations covering the 1990's.

cis92a.dat:  This file contains the 'business as usual' IS92a future scenario.
This scenario has been modified because this scenario over-estimated the
carbon dioxide growth rate in the 1990's.  The offset between the annual mean
observed mixing ratio from the NOAA CMDL Mauna Loa data and IS92a for 2001 has been subtracted from the original values.

read_co2.f:OCMIP routine that reads in the historical and future scenario carbon dioxide.  Note that only the 8th IPCC scenario, IS92a, will be used for this
experiment.

c_interp.f: OCMIP routine that interpolates the atmospheric carbon dioxide to
your model's time step.  The related routine try_c_interp.f provides an
example of how to use this code.