Atmospheric CO2 Record from In Situ Measurements at Amsterdam Island (1980-1995)
Until 1993 air samples were collected continuously through an air intake located at the top of a tower, 9 m above ground and 65 m above mean sea level. Since 1994, the intake has been situated 20 m above ground and 76 m above mean sea level. The tower is located at the north-northwest end of the isl...
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Environmental System Science Data Infrastructure for a Virtual Ecosystem; Carbon Dioxide Information Analysis Center (CDIAC), Oak Ridge National Laboratory (ORNL), Oak Ridge, TN (United States)
1996
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Online Access: | https://dx.doi.org/10.3334/cdiac/atg.013 https://www.osti.gov/servlets/purl/1394176/ |
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ftdatacite:10.3334/cdiac/atg.013 2023-05-15T13:22:32+02:00 Atmospheric CO2 Record from In Situ Measurements at Amsterdam Island (1980-1995) Gaudry, A. Kazan, V. Monfray, P. 1996 https://dx.doi.org/10.3334/cdiac/atg.013 https://www.osti.gov/servlets/purl/1394176/ en eng Environmental System Science Data Infrastructure for a Virtual Ecosystem; Carbon Dioxide Information Analysis Center (CDIAC), Oak Ridge National Laboratory (ORNL), Oak Ridge, TN (United States) 54 ENVIRONMENTAL SCIENCES dataset Numeric Data Dataset 1996 ftdatacite https://doi.org/10.3334/cdiac/atg.013 2021-11-05T12:55:41Z Until 1993 air samples were collected continuously through an air intake located at the top of a tower, 9 m above ground and 65 m above mean sea level. Since 1994, the intake has been situated 20 m above ground and 76 m above mean sea level. The tower is located at the north-northwest end of the island on the edge of a 55 m cliff. The air is dried by means of a cryogenic water trap at -60°C. Until 1990, determinations of CO2 were made by using successively two Hartmann-Braun URAS 2T nondispersive infrared (NDIR) analyzers. Since 1991, CO2 determinations have been made using a Siemens ULTRAMAT 5F NDIR. Standard gases in use from October 1980 to December of 1984 were CO2-in-N2 mixtures certified by Scripps Institution of Oceanography (SIO). The N2 scale was corrected for the carrier gas effect to obtain the air scale (WMO mole fraction scale). In 1985, CO2-in-air mixtures expressed in the 1985 WMO mole fraction in air scale were introduced. In 1990, a new series of 12 primary standard gases were gravimetrically prepared, then linearly adjusted at the laboratory and checked several times (i.e., 1990, 1992, and 1993) through intercalibrations with DSIR in New Zealand and NOAA/CMDL, which both used the 1985 mole fraction scale. The agreement was always better than 0.1 ppm (Monfray et al. 1992). Since 1993, the 1993 mole fraction scale has been used thanks to a new series of 10 cylinders provided by SIO. Dataset Amsterdam Island DataCite Metadata Store (German National Library of Science and Technology) New Zealand Scripps ENVELOPE(-63.783,-63.783,-69.150,-69.150) Uras ENVELOPE(42.939,42.939,63.262,63.262) |
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Open Polar |
collection |
DataCite Metadata Store (German National Library of Science and Technology) |
op_collection_id |
ftdatacite |
language |
English |
topic |
54 ENVIRONMENTAL SCIENCES |
spellingShingle |
54 ENVIRONMENTAL SCIENCES Gaudry, A. Kazan, V. Monfray, P. Atmospheric CO2 Record from In Situ Measurements at Amsterdam Island (1980-1995) |
topic_facet |
54 ENVIRONMENTAL SCIENCES |
description |
Until 1993 air samples were collected continuously through an air intake located at the top of a tower, 9 m above ground and 65 m above mean sea level. Since 1994, the intake has been situated 20 m above ground and 76 m above mean sea level. The tower is located at the north-northwest end of the island on the edge of a 55 m cliff. The air is dried by means of a cryogenic water trap at -60°C. Until 1990, determinations of CO2 were made by using successively two Hartmann-Braun URAS 2T nondispersive infrared (NDIR) analyzers. Since 1991, CO2 determinations have been made using a Siemens ULTRAMAT 5F NDIR. Standard gases in use from October 1980 to December of 1984 were CO2-in-N2 mixtures certified by Scripps Institution of Oceanography (SIO). The N2 scale was corrected for the carrier gas effect to obtain the air scale (WMO mole fraction scale). In 1985, CO2-in-air mixtures expressed in the 1985 WMO mole fraction in air scale were introduced. In 1990, a new series of 12 primary standard gases were gravimetrically prepared, then linearly adjusted at the laboratory and checked several times (i.e., 1990, 1992, and 1993) through intercalibrations with DSIR in New Zealand and NOAA/CMDL, which both used the 1985 mole fraction scale. The agreement was always better than 0.1 ppm (Monfray et al. 1992). Since 1993, the 1993 mole fraction scale has been used thanks to a new series of 10 cylinders provided by SIO. |
format |
Dataset |
author |
Gaudry, A. Kazan, V. Monfray, P. |
author_facet |
Gaudry, A. Kazan, V. Monfray, P. |
author_sort |
Gaudry, A. |
title |
Atmospheric CO2 Record from In Situ Measurements at Amsterdam Island (1980-1995) |
title_short |
Atmospheric CO2 Record from In Situ Measurements at Amsterdam Island (1980-1995) |
title_full |
Atmospheric CO2 Record from In Situ Measurements at Amsterdam Island (1980-1995) |
title_fullStr |
Atmospheric CO2 Record from In Situ Measurements at Amsterdam Island (1980-1995) |
title_full_unstemmed |
Atmospheric CO2 Record from In Situ Measurements at Amsterdam Island (1980-1995) |
title_sort |
atmospheric co2 record from in situ measurements at amsterdam island (1980-1995) |
publisher |
Environmental System Science Data Infrastructure for a Virtual Ecosystem; Carbon Dioxide Information Analysis Center (CDIAC), Oak Ridge National Laboratory (ORNL), Oak Ridge, TN (United States) |
publishDate |
1996 |
url |
https://dx.doi.org/10.3334/cdiac/atg.013 https://www.osti.gov/servlets/purl/1394176/ |
long_lat |
ENVELOPE(-63.783,-63.783,-69.150,-69.150) ENVELOPE(42.939,42.939,63.262,63.262) |
geographic |
New Zealand Scripps Uras |
geographic_facet |
New Zealand Scripps Uras |
genre |
Amsterdam Island |
genre_facet |
Amsterdam Island |
op_doi |
https://doi.org/10.3334/cdiac/atg.013 |
_version_ |
1766365384162672640 |