In situ Carbon 13 and Oxygen 18 Ratios of Atmospheric CO2 from Cape Grim, Tasmania, Australia,1982-1993 (DB1014)
Since 1982, a continuous program of sampling atmospheric CO2 to determine stable isotope ratios has been maintained at the Australian Baseline Air Pollution Station, Cape Grim, Tasmania (40°, 40'56"S, 144°, 41'18"E). The process of in situ extraction of CO2 from air, the preponde...
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ESS-DIVE: Deep Insight for Earth Science Data
1995
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dataone:ess-dive-61dd2a9c56051e5-20230407T152118981138 2024-10-03T18:46:28+00:00 In situ Carbon 13 and Oxygen 18 Ratios of Atmospheric CO2 from Cape Grim, Tasmania, Australia,1982-1993 (DB1014) R. J. Francey C. E. Allison Cape Grim, Tasmania, Australia ENVELOPE(144.683,144.683,-40.683,-40.683) BEGINDATE: 1982-01-19T00:00:00Z ENDDATE: 1993-12-17T00:00:00Z 1995-01-21T00:00:00Z https://search.dataone.org/view/ess-dive-61dd2a9c56051e5-20230407T152118981138 unknown ESS-DIVE: Deep Insight for Earth Science Data Atmospheric CO2 concentrations carbon 13 ratio oxygen 18 ratio DB1014 height tear d13C d18O Dataset 1995 dataone:urn:node:ESS_DIVE 2024-10-03T18:19:22Z Since 1982, a continuous program of sampling atmospheric CO2 to determine stable isotope ratios has been maintained at the Australian Baseline Air Pollution Station, Cape Grim, Tasmania (40°, 40'56"S, 144°, 41'18"E). The process of in situ extraction of CO2 from air, the preponderance of samples collected in conditions of strong wind from the marine boundary layer of the Southern Ocean, and the determination of all isotope ratios relative to a common high purity CO2 reference gas with isotopic δ13C close to atmospheric values, are a unique combination of factors with respect to obtaining a globally representative signal from a surface site. Air samples are collected during baseline condition episodes at a frequency of around one sample per week. Baseline conditions are characterized by wind direction in the sector 190°-280°, condensation nucleus concentration below 600 per cm-3, and steady continuous CO2 concentrations (variation ± 0.2 ppmv per hour). A vacuum pump draws air from either the 10 m or 70 m intakes and sampling alternates between the two intakes. The air from the intake is dried with a trap immersed in an alcohol bath at about -80°C. Mass spectrometer analyses for δ13C and δ18O are carried out by CSIRO's Division of Atmospheric Research in Aspendale, usually one to three weeks following collection. This record is possibly the most accurate representation of global atmospheric 13C behavior over the last decade and may be used to partition the uptake of fossil-fuel carbon emissions between ocean and terrestrial plant reservoirs. Using these data, Francey et al. (1995) observed a gradual decrease in δ13C from 1982 to 1993, but with a pronounced flattening from 1988 to 1990; a trend that appears to involve the terrestrial carbon cycle. For access to the data files, click this link to the CDIAC data transition website: http://cdiac.ess-dive.lbl.gov/ndps/db1014.html This dataset was transferred from the CDIAC Archive and published on ESS-DIVE in 2018 under the project title "Carbon Dioxide Information Analysis Center (CDIAC), Oak Ridge National Laboratory (ORNL), Oak Ridge, TN (United States); CSIRO Division of Atmospheric Research, Australia". In 2023, the project title was updated to "Carbon Dioxide Information Analysis Center (CDIAC); Oak Ridge National Laboratory (ORNL), Oak Ridge, TN (United States)" to enable consistent management of all datasets previously hosted by the CDIAC Archive that are now published on ESS-DIVE. Dataset Southern Ocean ESS-DIVE: Deep Insight for Earth Science Data (via DataONE) Grim ENVELOPE(-64.486,-64.486,-65.379,-65.379) Southern Ocean ENVELOPE(144.683,144.683,-40.683,-40.683) |
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 |
Atmospheric CO2 concentrations carbon 13 ratio oxygen 18 ratio DB1014 height tear d13C d18O |
spellingShingle |
Atmospheric CO2 concentrations carbon 13 ratio oxygen 18 ratio DB1014 height tear d13C d18O R. J. Francey C. E. Allison In situ Carbon 13 and Oxygen 18 Ratios of Atmospheric CO2 from Cape Grim, Tasmania, Australia,1982-1993 (DB1014) |
topic_facet |
Atmospheric CO2 concentrations carbon 13 ratio oxygen 18 ratio DB1014 height tear d13C d18O |
description |
Since 1982, a continuous program of sampling atmospheric CO2 to determine stable isotope ratios has been maintained at the Australian Baseline Air Pollution Station, Cape Grim, Tasmania (40°, 40'56"S, 144°, 41'18"E). The process of in situ extraction of CO2 from air, the preponderance of samples collected in conditions of strong wind from the marine boundary layer of the Southern Ocean, and the determination of all isotope ratios relative to a common high purity CO2 reference gas with isotopic δ13C close to atmospheric values, are a unique combination of factors with respect to obtaining a globally representative signal from a surface site. Air samples are collected during baseline condition episodes at a frequency of around one sample per week. Baseline conditions are characterized by wind direction in the sector 190°-280°, condensation nucleus concentration below 600 per cm-3, and steady continuous CO2 concentrations (variation ± 0.2 ppmv per hour). A vacuum pump draws air from either the 10 m or 70 m intakes and sampling alternates between the two intakes. The air from the intake is dried with a trap immersed in an alcohol bath at about -80°C. Mass spectrometer analyses for δ13C and δ18O are carried out by CSIRO's Division of Atmospheric Research in Aspendale, usually one to three weeks following collection. This record is possibly the most accurate representation of global atmospheric 13C behavior over the last decade and may be used to partition the uptake of fossil-fuel carbon emissions between ocean and terrestrial plant reservoirs. Using these data, Francey et al. (1995) observed a gradual decrease in δ13C from 1982 to 1993, but with a pronounced flattening from 1988 to 1990; a trend that appears to involve the terrestrial carbon cycle. For access to the data files, click this link to the CDIAC data transition website: http://cdiac.ess-dive.lbl.gov/ndps/db1014.html This dataset was transferred from the CDIAC Archive and published on ESS-DIVE in 2018 under the project title "Carbon Dioxide Information Analysis Center (CDIAC), Oak Ridge National Laboratory (ORNL), Oak Ridge, TN (United States); CSIRO Division of Atmospheric Research, Australia". In 2023, the project title was updated to "Carbon Dioxide Information Analysis Center (CDIAC); Oak Ridge National Laboratory (ORNL), Oak Ridge, TN (United States)" to enable consistent management of all datasets previously hosted by the CDIAC Archive that are now published on ESS-DIVE. |
format |
Dataset |
author |
R. J. Francey C. E. Allison |
author_facet |
R. J. Francey C. E. Allison |
author_sort |
R. J. Francey |
title |
In situ Carbon 13 and Oxygen 18 Ratios of Atmospheric CO2 from Cape Grim, Tasmania, Australia,1982-1993 (DB1014) |
title_short |
In situ Carbon 13 and Oxygen 18 Ratios of Atmospheric CO2 from Cape Grim, Tasmania, Australia,1982-1993 (DB1014) |
title_full |
In situ Carbon 13 and Oxygen 18 Ratios of Atmospheric CO2 from Cape Grim, Tasmania, Australia,1982-1993 (DB1014) |
title_fullStr |
In situ Carbon 13 and Oxygen 18 Ratios of Atmospheric CO2 from Cape Grim, Tasmania, Australia,1982-1993 (DB1014) |
title_full_unstemmed |
In situ Carbon 13 and Oxygen 18 Ratios of Atmospheric CO2 from Cape Grim, Tasmania, Australia,1982-1993 (DB1014) |
title_sort |
in situ carbon 13 and oxygen 18 ratios of atmospheric co2 from cape grim, tasmania, australia,1982-1993 (db1014) |
publisher |
ESS-DIVE: Deep Insight for Earth Science Data |
publishDate |
1995 |
url |
https://search.dataone.org/view/ess-dive-61dd2a9c56051e5-20230407T152118981138 |
op_coverage |
Cape Grim, Tasmania, Australia ENVELOPE(144.683,144.683,-40.683,-40.683) BEGINDATE: 1982-01-19T00:00:00Z ENDDATE: 1993-12-17T00:00:00Z |
long_lat |
ENVELOPE(-64.486,-64.486,-65.379,-65.379) ENVELOPE(144.683,144.683,-40.683,-40.683) |
geographic |
Grim Southern Ocean |
geographic_facet |
Grim Southern Ocean |
genre |
Southern Ocean |
genre_facet |
Southern Ocean |
_version_ |
1811928889429065728 |