Historic CH4 Records from Antarctic and Greenland Ice Cores, Antarctic Firn Data, and Archived Air Samples from Cape Grim, Tasmania
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; t...
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ESS-DIVE: Deep Insight for Earth Science Data
2002
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dataone:ess-dive-47b6690fb47c0e7-20180704T210533551 2024-06-03T18:46:23+00:00 Historic CH4 Records from Antarctic and Greenland Ice Cores, Antarctic Firn Data, and Archived Air Samples from Cape Grim, Tasmania D. M. Etheridge L. P. Steele R. J. Francey R. J. Langenfelds Law Dome, Antarctica ENVELOPE(112.833,112.833,-66.733,-66.733) BEGINDATE: 1007-12-26T00:00:00Z ENDDATE: 1995-01-01T00:00:00Z 2002-09-01T00:00:00Z https://search.dataone.org/view/ess-dive-47b6690fb47c0e7-20180704T210533551 unknown ESS-DIVE: Deep Insight for Earth Science Data CH4 measurements CH4 mixing ratio atmospheric CH4 reconstructions TRENDS-OTHER ATMOSPHERIC TRACE GASES mean air age mean ice depth ice age year A.D. ice sample code year A.D. 75 year smoothing spline Dataset 2002 dataone:urn:node:ESS_DIVE 2024-06-03T18:11:16Z 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 Dataset Antarc* Antarctic Antarctica East Antarctica Greenland Greenland ice cores ice core Ice Sheet ESS-DIVE: Deep Insight for Earth Science Data (via DataONE) Antarctic The Antarctic East Antarctica Greenland Law Dome ENVELOPE(112.833,112.833,-66.733,-66.733) Grim ENVELOPE(-64.486,-64.486,-65.379,-65.379) ENVELOPE(112.833,112.833,-66.733,-66.733) |
institution |
Open Polar |
collection |
ESS-DIVE: Deep Insight for Earth Science Data (via DataONE) |
op_collection_id |
dataone:urn:node:ESS_DIVE |
language |
unknown |
topic |
CH4 measurements CH4 mixing ratio atmospheric CH4 reconstructions TRENDS-OTHER ATMOSPHERIC TRACE GASES mean air age mean ice depth ice age year A.D. ice sample code year A.D. 75 year smoothing spline |
spellingShingle |
CH4 measurements CH4 mixing ratio atmospheric CH4 reconstructions TRENDS-OTHER ATMOSPHERIC TRACE GASES mean air age mean ice depth ice age year A.D. ice sample code year A.D. 75 year smoothing spline D. M. Etheridge L. P. Steele R. J. Francey R. J. Langenfelds Historic CH4 Records from Antarctic and Greenland Ice Cores, Antarctic Firn Data, and Archived Air Samples from Cape Grim, Tasmania |
topic_facet |
CH4 measurements CH4 mixing ratio atmospheric CH4 reconstructions TRENDS-OTHER ATMOSPHERIC TRACE GASES mean air age mean ice depth ice age year A.D. ice sample code year A.D. 75 year smoothing spline |
description |
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 |
format |
Dataset |
author |
D. M. Etheridge L. P. Steele R. J. Francey R. J. Langenfelds |
author_facet |
D. M. Etheridge L. P. Steele R. J. Francey R. J. Langenfelds |
author_sort |
D. M. Etheridge |
title |
Historic CH4 Records from Antarctic and Greenland Ice Cores, Antarctic Firn Data, and Archived Air Samples from Cape Grim, Tasmania |
title_short |
Historic CH4 Records from Antarctic and Greenland Ice Cores, Antarctic Firn Data, and Archived Air Samples from Cape Grim, Tasmania |
title_full |
Historic CH4 Records from Antarctic and Greenland Ice Cores, Antarctic Firn Data, and Archived Air Samples from Cape Grim, Tasmania |
title_fullStr |
Historic CH4 Records from Antarctic and Greenland Ice Cores, Antarctic Firn Data, and Archived Air Samples from Cape Grim, Tasmania |
title_full_unstemmed |
Historic CH4 Records from Antarctic and Greenland Ice Cores, Antarctic Firn Data, and Archived Air Samples from Cape Grim, Tasmania |
title_sort |
historic ch4 records from antarctic and greenland ice cores, antarctic firn data, and archived air samples from cape grim, tasmania |
publisher |
ESS-DIVE: Deep Insight for Earth Science Data |
publishDate |
2002 |
url |
https://search.dataone.org/view/ess-dive-47b6690fb47c0e7-20180704T210533551 |
op_coverage |
Law Dome, Antarctica ENVELOPE(112.833,112.833,-66.733,-66.733) BEGINDATE: 1007-12-26T00:00:00Z ENDDATE: 1995-01-01T00:00:00Z |
long_lat |
ENVELOPE(112.833,112.833,-66.733,-66.733) ENVELOPE(-64.486,-64.486,-65.379,-65.379) ENVELOPE(112.833,112.833,-66.733,-66.733) |
geographic |
Antarctic The Antarctic East Antarctica Greenland Law Dome Grim |
geographic_facet |
Antarctic The Antarctic East Antarctica Greenland Law Dome Grim |
genre |
Antarc* Antarctic Antarctica East Antarctica Greenland Greenland ice cores ice core Ice Sheet |
genre_facet |
Antarc* Antarctic Antarctica East Antarctica Greenland Greenland ice cores ice core Ice Sheet |
_version_ |
1800870444169953280 |