Historic CH4 Records from Antarctic and Greenland Ice Cores, Antarctic Firn Data, and Archived Air Samples from Cape Grim, Tasmania

Etheridge, D. M.; Steele, L. P.; Francey, R. J.; Langenfelds, R. J.

doi:10.3334/CDIAC/ATG.030

Title: Historic CH4 Records from Antarctic and Greenland Ice Cores, Antarctic Firn Data, and Archived Air Samples from Cape Grim, Tasmania

Dataset
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Abstract

The Antarctic CH4 records presented here are derived from three ice cores obtained at Law Dome, East Antarctica (66°44'S, 112°50'E, 1390 meters above mean sea level). Law Dome has many qualities of an ideal ice core site for the reconstruction of past concentrations of atmospheric gases; these qualities include: negligible melting of the ice sheet surface, low concentrations of impurities, regular stratigraphic layering undisturbed by wind stress at the surface or differential ice flow at depth, and a high snow accumulation rate. Further details on the site, drilling, and cores are provided by Etheridge et al. (1998), Etheridge et al. (1996), Etheridge and Wookey (1989), and Morgan et al. (1997). The two Greenland ice cores are from the Summit region (72°34' N, 37°37' W, 3200 meters above mean sea level). Lower snow accumulation rate there results in lower air-age resolution, and measurements presented here cover only the pre-industrial period (until 1885). More details about these measurements are presented in Etheridge et al. (1998). Additionally, this site contains firn data from Core DE08-2, and archived air samples from Cape Grim, Tasmania, for comparison.For access to the data files, click this link to the CDIAC data transition website: http://cdiac.ess-dive.lbl.gov/trends/atm_meth/lawdome_meth.html

Authors:

Etheridge, D. M.; Steele, L. P.; Francey, R. J.; Langenfelds, R. J.

CSIRO, Division of Atmospheric Research

Publication Date:: 2002-09-01

Other Number(s):: osti:1394397; doi:10.3334/CDIAC/ATG.030; cdiac:doi 10.3334/CDIAC/cli.030

Research Org.:: Environmental System Science Data Infrastructure for a Virtual Ecosystem (ESS-DIVE) (United States)

Sponsoring Org.:: U.S. DOE > Office of Science (SC) > Biological and Environmental Research (BER) (SC-23)

Subject:: 54 ENVIRONMENTAL SCIENCES

Keywords:: CH4 measurements; CH4 mixing ratio; atmospheric CH4 reconstructions; TRENDS-OTHER ATMOSPHERIC TRACE GASES; mean air age; CH4 mixing ratio; mean ice depth; ice age year A.D.; ice sample code; year A.D.; 75 year smoothing spline

Geolocation:: -66.733,112.833|-66.733,112.833|-66.733,112.833|-66.733,112.833|-66.733,112.833

OSTI Identifier:: 1394397

DOI:: https://doi.org/10.3334/CDIAC/ATG.030

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Citation Formats


                    Etheridge, D. M., Steele, L. P., Francey, R. J., and Langenfelds, R. J. Historic CH4 Records from Antarctic and Greenland Ice Cores, Antarctic Firn Data, and Archived Air Samples from Cape Grim, Tasmania.  United States: N. p., 2002. 
        Web.  doi:10.3334/CDIAC/ATG.030.

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                    Etheridge, D. M., Steele, L. P., Francey, R. J., & Langenfelds, R. J. Historic CH4 Records from Antarctic and Greenland Ice Cores, Antarctic Firn Data, and Archived Air Samples from Cape Grim, Tasmania.  United States.  doi:https://doi.org/10.3334/CDIAC/ATG.030

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                    Etheridge, D. M., Steele, L. P., Francey, R. J., and Langenfelds, R. J. 2002.  
"Historic CH4 Records from Antarctic and Greenland Ice Cores, Antarctic Firn Data, and Archived Air Samples from Cape Grim, Tasmania".  United States.  doi:https://doi.org/10.3334/CDIAC/ATG.030.  https://www.osti.gov/servlets/purl/1394397. Pub date:Sun Sep 01 00:00:00 EDT 2002

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@article{osti_1394397,

  title        = {Historic CH4 Records from Antarctic and Greenland Ice Cores, Antarctic Firn Data, and Archived Air Samples from Cape Grim, Tasmania},

  author       = {Etheridge, D. M. and Steele, L. P. and Francey, R. J. and Langenfelds, R. J.},

  abstractNote = {The Antarctic CH4 records presented here are derived from three ice cores obtained at Law Dome, East Antarctica (66°44'S, 112°50'E, 1390 meters above mean sea level). Law Dome has many qualities of an ideal ice core site for the reconstruction of past concentrations of atmospheric gases; these qualities include: negligible melting of the ice sheet surface, low concentrations of impurities, regular stratigraphic layering undisturbed by wind stress at the surface or differential ice flow at depth, and a high snow accumulation rate. Further details on the site, drilling, and cores are provided by Etheridge et al. (1998), Etheridge et al. (1996), Etheridge and Wookey (1989), and Morgan et al. (1997). The two Greenland ice cores are from the Summit region (72°34' N, 37°37' W, 3200 meters above mean sea level). Lower snow accumulation rate there results in lower air-age resolution, and measurements presented here cover only the pre-industrial period (until 1885). More details about these measurements are presented in Etheridge et al. (1998). Additionally, this site contains firn data from Core DE08-2, and archived air samples from Cape Grim, Tasmania, for comparison.For access to the data files, click this link to the CDIAC data transition website: http://cdiac.ess-dive.lbl.gov/trends/atm_meth/lawdome_meth.html},

  doi          = {10.3334/CDIAC/ATG.030},

  journal      = {},

  number       = ,

  volume       = ,

  place        = {United States},

  year         = {2002},

  month        = {9}

}

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DOI: https://doi.org/10.3334/CDIAC/ATG.030

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