Sajama Ice Core Gas Composition Data: Readme file
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              World Data Center for Paleoclimatology, Boulder
                                and 
                   NOAA Paleoclimatology Program
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NOTE: PLEASE CITE ORIGINAL REFERENCE WHEN USING THIS DATA!!!!!

NAME OF DATA SET: Sajama Ice Core Gas Composition Data
LAST UPDATE: 9/2001 (Original receipt by WDC Paleo)

CONTRIBUTORS: Todd Sowers and Richard K. Campen, 
Pennsylvania State University

IGBP PAGES/WDCA CONTRIBUTION SERIES NUMBER: 2001-062

SUGGESTED DATA CITATION: Sowers, T.A. and Campen, R.K., 2001,
Sajama Ice Core Gas Composition Data, 
IGBP PAGES/World Data Center A for Paleoclimatology 
Data Contribution Series #2001-062. 
NOAA/NGDC Paleoclimatology Program, Boulder CO, USA. 

ORIGINAL REFERENCES:  
Campen, R. K., 2000, Measurements of gasses trapped in a South American 
ice core: Paleoatmospheric composition and inferred microbial activity,  
Master's Thesis, Pennsylvania State University, Completed May 2000, 146pp.

Thompson, L.G., M.E.Davis, E.M.Thompson, T.A.Sowers, K.A.Henderson, 
V.S.Zagorodnov, P.N.Lin, V.N. Mikhalenko, R.K.Campen, J.F.Bolzan, 
J.Cole-Dai and B.Francou. 1998. 
A 25,000 year tropical climate history from Bolivian ice cores. 
Science, 282(5295), 1858-1864. 


FUNDING SOURCE: US National Science Foundation 
(Grant# ATM-9618067 to Todd Sowers/PSU)

GEOGRAPHIC REGION: South America, Bolivian Altiplano

PERIOD OF RECORD: 25 KYrBP-Present

LIST OF FILES: Readme_Sajama_Gas.txt (this file),
sajama_gas.xls (Microsoft Excel format)
sajama_gas.txt (ASCII text format) 
                

DESCRIPTION:
Sajama Ice Core, Bolivia
· Latitude 18o 06'S
· Longitude 68o 53'W
· Elevation : 6542masl
· Variable names : Depth; Gas Age; d15N ; Atm d18O; d(32/28) ; dAr/N2; dCO2/N2; CH4
· Variable units (meters below surface), (years before present), (‰ with respect to present), 
(‰ with respect to present), (‰with respect to present), (‰with respect to present), 
(‰ with respect to present), (ppbV)

· Data precision (± 0.01m), (± 5-1,000 years), (±0.03‰), (±0.06‰), (±0.3‰), (±0.3‰), (±100‰), ,
 (± 30 ppbV))



General Information about the Sajama Ice Cores

Site Description and Analysis
	In June-July 1997, two ice cores to bedrock were recovered from the summit 
of the extinct Sajama volcano, Bolivia (18øS, 69øW, elevation 6540 m) and were 
subsequently transported back in a frozen state to the cold room facility at the 
Byrd Polar Research Center (BPRC).  Core 1 (SjC1, 132.4 m) was sectioned in the 
BPRC laboratory into 5063 samples decreasing in thickness from ~15 cm at the top 
to ~1-2 cm at the base.  Core 2 (SjC2, 132.8 m), drilled just 3m from the SjC1 site, 
was sampled more coarsely, only 803 samples collected from its length.  
Borehole temperatures ranged from -11.3 to -9.5øC and indicate that the glacier 
remains frozen to the bed.