Annual Accumulation Data from 1997 and 1998 PARCA Ice Cores 


The annual accumulation data (in water equivalent) from 14 cores collected in 
1997 and 16 cores collected in 1998 are included in Tables 1997 and 1998 
respectively.  Data is provided in Lotus123 and Excel Format.  Users of these 
data are encouraged to see the papers in the special issue of the Journal of 
Geophysical Research to be published in August 2001.  See below the discussion 
of the data included in worksheet.

If you use these data please reference the paper below that discusses the 
details of the dating and the construction of annual layer thicknesses.  Also, 
credit the NASA PARCA Program as the primary funding source for these data.

Mosley-Thompson, E., J.R. McConnell, R.C. Bales, Z. Li, P-N. Lin, K. Steffen, 
L.G. Thompson, R. Edwards, and D. Bathke. Local to regional-scale variability of 
Greenland accumulation from PARCA cores. Journal of Geophysical Research 
(Atmospheres), in press, 2001

Other pertinent papers appearing in 2000 and 2001 include:

Bales, R.C., J.R. McConnell, E. Mosley-Thompson and B. Csatho. Accumulation over 
the Greenland ice sheet from historical and recent records.  Journal of 
Geophysical Research (Atmospheres), in press, 2001

Bales, R.C., J.R. McConnell, E. Mosley-Thompson, and G. Lamorey. Accumulation 
map for the Greenland ice sheet 1971-1990. Geophysical Research Letters, in 
press, 2001.

Bales, R.C. E. Mosley-Thompson, J.R. McConnell. Variability of accumulation in 
northwest Greenland over the past 250 years, Geophysical Research Letters, in 
press, 2001.

McConnell, J., G. Lamorey, E. Hanna, E. Mosley-Thompson, R. Bales, D. Belle-
Oudry, J. Burkhart, J. Kyne, Annual net snow accumulation over southern 
Greenland from 1975 to1998.  Journal of Geophysical Research (Atmospheres), in 
press, 2001.

McConnell, J.R., R.J. Arthern, E. Mosley-Thompson, C.H. Davis, R.C. Bales, R. 
Thomas, J.F. Burkhart, and J.D. Kyne.  Changes in Greenland ice sheet elevation 
changes attributed primarily to snow accumulation variability. Nature, 
406(6798), 877-879, 2000.

McConnell, J.R., E. Mosley-Thompson, D.H. Bromwich, R.C. Bales, J.D. Kyne.  
Interannual variations of snow accumulation on the Greenland ice sheet (1985-
1996): New Observations versus model predictions.  Journal of Geophysical 
Research (Atmospheres), 105(D3), 4039-4046, 2001.

DATA SET NOTES:

Note that data for each core are contained on a separate sheet of the 
spreadsheet file.

Data include:

1) site location and elevation
2) density measurements
3) density model used to convert depth in firn to depth in water equivalent 
4) annual layer thicknesses (meters of water equivalent) based upon 
a) the winter minimum in dust concentration
b) the winter minimum in the oxygen isotopic ratio (d18O) 
c) the winter minimum in hydrogen peroxide (H2O2) 
5) visible stratigraphy 
6) additional notes of explanation may be included at the bottom of the first 
column.