IEDA
Dataset Information
Firn Air Isotope and Temperature Measurements from Siple Dome and South Pole
Data DOI:
https://doi.org/10.7265/N51N7Z2P
Cite as
Severinghaus, J. P., Battle, M., & Grachev, A. (2001) "Firn Air Isotope and Temperature Measurements from Siple Dome and South Pole" U.S. Antarctic Program (USAP) Data Center. doi: https://doi.org/10.7265/N51N7Z2P.
AMD - DIF Record(s)
Abstract
This data set includes d15N, d18O/2, dO2/N2/4, d40Ar/4, d38/Ar/2, d84Kr/48, and d132Xe/96 values for air drawn from the top 15 to 50 m of firn at the South Pole (summer and winter 1998) and a site at Siple Dome (summers 1996 and 1998). Data also include related firn temperature measurements. The objective of this research was to better understand thermal fractionation processes affecting records of atmospheric history from firn and ice core gases. Recent work (e.g., Severinghaus and Brook, 1999) has exploited trapped air in ice and deep firn as a record of past atmospheric composition and climate change. Interpretation of these paleoclimate archives is complicated by artifacts of thermal diffusion, a process in which heavier gases migrate down temperature gradients toward colder regions in the firn. Seasonal temperature change at the snow surface creates strong temperature gradients in the top few meters of the firn, which cause isotopic fractionation of firn gases. A specific goal of this research is to identify any long-term effects of seasonal temperature fluctuations on firn air isotopic anomalies.
Creator(s):
Severinghaus, Jeffrey P.; Grachev, Alexi; Battle, Mark
Date Created:
2001-01-01
Repository:
USAP-DC (current) - NSIDC (original)
Spatial Extent(s)
West: -148.767, East: -148.767, South: -81.667, North: -81.667
West: -102, East: -102, South: -89.997, North: -89.997
Temporal Extent(s)
Start: 1998-01-14 - End: 1998-07-28
Version:
1
References
  1. Severinghaus, J.P., A. Grachev, and M. Battle. 2001. Thermal, fractionation of air in polar firn by seasonal temperature gradients., Geochemistry, Geophysics, Geosystems [online journal] 2: Paper, no. 2000GC000146. (doi:10.1029/2000GC000146)
  2. Severinghaus, J.P. and E.J. Brook, 1999. Abrupt climate change at the, end of the last glacial period inferred from trapped air in polar, ice. Science 286: 930-934. (doi:10.1126/science.286.5441.930 )
Supplemental Docs
View
Download
nsidc0098_UG.pdf
Data Files
Download
4.8 kB
firn_air_isotopes.txt

MD5 Checksum: f9f4b5539bd2a56e861f4e36bfa076c7 File Type: Text File

Download
4.9 kB
firn_air_isotopes.xls

MD5 Checksum: 6854b770e387e5e63fb8d773765bbcc4 File Type: Microsoft Excel

Download
865 Bytes
firn_temps.txt

MD5 Checksum: 2b818cb33013b22862316fd6948bc5d4 File Type: Text File

Download
854 Bytes
firn_temps.xls

MD5 Checksum: 56ed96d72b775c3c9a7806ea19b05a65 File Type: Microsoft Excel

Download
7.8 kB
nsidc-0098_fgdc.xml

MD5 Checksum: 142f0d493e6f02266a0fa601763ff3c6 File Type: XML

This dataset has been downloaded 0 times since March 2017 (based on unique date-IP combinations)