High Accuracy 14C Measurements for Atmospheric CO2 Samples from the South Pole and Point Barrow, Alaska by Accelerator Mass Spectrometry
Accelerator mass spectrometry (AMS) was used to obtain 14 CO 2 measurements from flasks collected at the South Pole and Point Barrow, Alaska, USA, at the Scripps Institute of Oceanography network station (Keeling et al., 1989) (see also http://cdiac.ess-dive.lbl.gov/trends/co2/sio-bar.html). Air sam...
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dataone:ess-dive-5aa19dbeec8ce1c-20180727T044302915 2024-06-03T18:46:45+00:00 High Accuracy 14C Measurements for Atmospheric CO2 Samples from the South Pole and Point Barrow, Alaska by Accelerator Mass Spectrometry H.A.J. Meijer M.H. Pertuisot J. van der Plicht Point Barrow, Alaska, USA ENVELOPE(-156.18333,-24.8,71.31667,-89.98333) BEGINDATE: 1984-03-21T00:00:00Z ENDDATE: 1992-01-06T00:00:00Z 2006-01-01T00:00:00Z https://search.dataone.org/view/ess-dive-5aa19dbeec8ce1c-20180727T044302915 unknown ESS-DIVE: Deep Insight for Earth Science Data 14C C14 Atmospheric C14 Atmospheric 14C Atmospheric 14CO2 Flask samples Flask sampling accelerator mass spectrometry accelerator mass spectroscopy Center for Isotope Research University of Groningen Sample date Smoothed 14CO2 concentration Smoothed seasonal 14CO2 concentration Smoothed total 14CO2 concentration Dataset 2006 dataone:urn:node:ESS_DIVE 2024-06-03T18:11:16Z Accelerator mass spectrometry (AMS) was used to obtain 14 CO 2 measurements from flasks collected at the South Pole and Point Barrow, Alaska, USA, at the Scripps Institute of Oceanography network station (Keeling et al., 1989) (see also http://cdiac.ess-dive.lbl.gov/trends/co2/sio-bar.html). Air samples for years 1985-1991, originally collected in 5-liter flasks, had been stored in Pyrex sealed-off tubes after stable isotope analysis (Roeloffzen et al., 1991). These samples were more or less evenly distributed over time. Typically, the extracted CO 2 from 2-5 flasks from consecutive weekly measurements were put together in one flame-off tube. The tubes were broken in the standard inlet arrangement of a dual inlet stable isotope ratio mass spectrometer, and a stable isotope measurement was performed using the same instrument used in the original analyses (Roeloffzen et al., 1991). Then, the CO 2 was cryogenically trapped and converted to graphite (Aerts-Bijma et al., 1997). For the majority of the samples the amount of CO 2 was sufficient for our regular, 2 mm diameter AMS targets, containing about 1.5 mg of C. For most of these, two targets could be produced from one CO 2 flask. In some cases, however, the amount of CO 2 was only sufficient for a smaller target. Individual standard samples were graphitized along with the corresponding atmospheric CO 2 samples, so that any day to day variability in the graphitization circumstances would be visible in the standard samples. The 14 C is reported as ∆ 14 C as per Stuiver and Polach 1977. More information about 14 C standards can be found at: http://www.c14dating.com/agecalc.html. More information about sample preparation and analysis at the Groningen AMS can be found at: http://www.rug.nl/ees/onderzoek/programmas/radiocarbonams/sampleTreatmentAms The primary literature reference for the material presented here is Meijer et al. (2006). The statistical analysis included curve fitting described by Cleveland (1979). A seasonal pattern was then fit to the residuals, and the data are given in terms of these trends and departures from them. Dataset Barrow Point Barrow South pole Alaska ESS-DIVE: Deep Insight for Earth Science Data (via DataONE) South Pole Scripps ENVELOPE(-63.783,-63.783,-69.150,-69.150) ENVELOPE(-156.18333,-24.8,71.31667,-89.98333) |
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 |
14C C14 Atmospheric C14 Atmospheric 14C Atmospheric 14CO2 Flask samples Flask sampling accelerator mass spectrometry accelerator mass spectroscopy Center for Isotope Research University of Groningen Sample date Smoothed 14CO2 concentration Smoothed seasonal 14CO2 concentration Smoothed total 14CO2 concentration |
spellingShingle |
14C C14 Atmospheric C14 Atmospheric 14C Atmospheric 14CO2 Flask samples Flask sampling accelerator mass spectrometry accelerator mass spectroscopy Center for Isotope Research University of Groningen Sample date Smoothed 14CO2 concentration Smoothed seasonal 14CO2 concentration Smoothed total 14CO2 concentration H.A.J. Meijer M.H. Pertuisot J. van der Plicht High Accuracy 14C Measurements for Atmospheric CO2 Samples from the South Pole and Point Barrow, Alaska by Accelerator Mass Spectrometry |
topic_facet |
14C C14 Atmospheric C14 Atmospheric 14C Atmospheric 14CO2 Flask samples Flask sampling accelerator mass spectrometry accelerator mass spectroscopy Center for Isotope Research University of Groningen Sample date Smoothed 14CO2 concentration Smoothed seasonal 14CO2 concentration Smoothed total 14CO2 concentration |
description |
Accelerator mass spectrometry (AMS) was used to obtain 14 CO 2 measurements from flasks collected at the South Pole and Point Barrow, Alaska, USA, at the Scripps Institute of Oceanography network station (Keeling et al., 1989) (see also http://cdiac.ess-dive.lbl.gov/trends/co2/sio-bar.html). Air samples for years 1985-1991, originally collected in 5-liter flasks, had been stored in Pyrex sealed-off tubes after stable isotope analysis (Roeloffzen et al., 1991). These samples were more or less evenly distributed over time. Typically, the extracted CO 2 from 2-5 flasks from consecutive weekly measurements were put together in one flame-off tube. The tubes were broken in the standard inlet arrangement of a dual inlet stable isotope ratio mass spectrometer, and a stable isotope measurement was performed using the same instrument used in the original analyses (Roeloffzen et al., 1991). Then, the CO 2 was cryogenically trapped and converted to graphite (Aerts-Bijma et al., 1997). For the majority of the samples the amount of CO 2 was sufficient for our regular, 2 mm diameter AMS targets, containing about 1.5 mg of C. For most of these, two targets could be produced from one CO 2 flask. In some cases, however, the amount of CO 2 was only sufficient for a smaller target. Individual standard samples were graphitized along with the corresponding atmospheric CO 2 samples, so that any day to day variability in the graphitization circumstances would be visible in the standard samples. The 14 C is reported as ∆ 14 C as per Stuiver and Polach 1977. More information about 14 C standards can be found at: http://www.c14dating.com/agecalc.html. More information about sample preparation and analysis at the Groningen AMS can be found at: http://www.rug.nl/ees/onderzoek/programmas/radiocarbonams/sampleTreatmentAms The primary literature reference for the material presented here is Meijer et al. (2006). The statistical analysis included curve fitting described by Cleveland (1979). A seasonal pattern was then fit to the residuals, and the data are given in terms of these trends and departures from them. |
format |
Dataset |
author |
H.A.J. Meijer M.H. Pertuisot J. van der Plicht |
author_facet |
H.A.J. Meijer M.H. Pertuisot J. van der Plicht |
author_sort |
H.A.J. Meijer |
title |
High Accuracy 14C Measurements for Atmospheric CO2 Samples from the South Pole and Point Barrow, Alaska by Accelerator Mass Spectrometry |
title_short |
High Accuracy 14C Measurements for Atmospheric CO2 Samples from the South Pole and Point Barrow, Alaska by Accelerator Mass Spectrometry |
title_full |
High Accuracy 14C Measurements for Atmospheric CO2 Samples from the South Pole and Point Barrow, Alaska by Accelerator Mass Spectrometry |
title_fullStr |
High Accuracy 14C Measurements for Atmospheric CO2 Samples from the South Pole and Point Barrow, Alaska by Accelerator Mass Spectrometry |
title_full_unstemmed |
High Accuracy 14C Measurements for Atmospheric CO2 Samples from the South Pole and Point Barrow, Alaska by Accelerator Mass Spectrometry |
title_sort |
high accuracy 14c measurements for atmospheric co2 samples from the south pole and point barrow, alaska by accelerator mass spectrometry |
publisher |
ESS-DIVE: Deep Insight for Earth Science Data |
publishDate |
2006 |
url |
https://search.dataone.org/view/ess-dive-5aa19dbeec8ce1c-20180727T044302915 |
op_coverage |
Point Barrow, Alaska, USA ENVELOPE(-156.18333,-24.8,71.31667,-89.98333) BEGINDATE: 1984-03-21T00:00:00Z ENDDATE: 1992-01-06T00:00:00Z |
long_lat |
ENVELOPE(-63.783,-63.783,-69.150,-69.150) ENVELOPE(-156.18333,-24.8,71.31667,-89.98333) |
geographic |
South Pole Scripps |
geographic_facet |
South Pole Scripps |
genre |
Barrow Point Barrow South pole Alaska |
genre_facet |
Barrow Point Barrow South pole Alaska |
_version_ |
1800870493740335104 |