The data included in the file "gisphc.dat" contain nitrate and conductivity
data from the GISPH core.  The data were originally acquired by Ed Zeller, 
University of Kansas.  The data were measured from the surface to a depth of
122 meters, and the analysis was performed simultaneously on the same 1.5 cm 
ice core sample for each data series.


The reference for the data and any research is below:

E. Zeller, "415-Year Greenland Ice Core Record of Solar Proton Events Dated 
by Volcanic Eruptive Episodes."  Institute for Tertiary-Quarternary Studies -
TER-QUA Symposium Series, 2:  1-24.


Please ackowledge receipt of these GISP2 data from the CODIAC archive at NCAR/EOL.

Date of last modification of document file:
6/17/08