Chlorofluorocarbons measured on water bottle samples during POLARSTERN cruise ANT-XXII/3
During the expedition a total of 800 samples on 60 CTD stations were collected for chlorofluorocarbons (CFC-11 and CFC-12), of which 723 where successfully analysed. The water samples from the rosette system were collected into 100 ml glass ampoules and sealed off after a CFC free headspace of pure...
Main Authors: | , , , |
---|---|
Format: | Dataset |
Language: | English |
Published: |
PANGAEA - Data Publisher for Earth & Environmental Science
2013
|
Subjects: | |
Online Access: | https://dx.doi.org/10.1594/pangaea.770667 https://doi.pangaea.de/10.1594/PANGAEA.770667 |
id |
ftdatacite:10.1594/pangaea.770667 |
---|---|
record_format |
openpolar |
spelling |
ftdatacite:10.1594/pangaea.770667 2023-05-15T14:14:59+02:00 Chlorofluorocarbons measured on water bottle samples during POLARSTERN cruise ANT-XXII/3 Huhn, Oliver Rhein, Monika Hoppema, Mario van Heuven, Steven 2013 text/tab-separated-values https://dx.doi.org/10.1594/pangaea.770667 https://doi.pangaea.de/10.1594/PANGAEA.770667 en eng PANGAEA - Data Publisher for Earth & Environmental Science https://dx.doi.org/10.1594/pangaea.787532 https://dx.doi.org/10.1016/j.dsr.2013.01.005 Creative Commons Attribution 3.0 Unported https://creativecommons.org/licenses/by/3.0/legalcode cc-by-3.0 CC-BY Event label Date/Time of event Latitude of event Longitude of event Elevation of event DEPTH, water Freon-11 trichorofluoromethane Freon-12 dichlorodifluoromethane Bottle number CTD/Rosette Gas chromatography ANT-XXII/3 Polarstern Dataset dataset 2013 ftdatacite https://doi.org/10.1594/pangaea.770667 https://doi.org/10.1594/pangaea.787532 https://doi.org/10.1016/j.dsr.2013.01.005 2022-02-09T13:37:10Z During the expedition a total of 800 samples on 60 CTD stations were collected for chlorofluorocarbons (CFC-11 and CFC-12), of which 723 where successfully analysed. The water samples from the rosette system were collected into 100 ml glass ampoules and sealed off after a CFC free headspace of pure nitrogen had been applied.The Chlorofluorocarbon (CFC-11 and CFC-12) water samples from the CTD-bottle-system are stored in glass ampoules without contact to the atmosphere during the tapping. Immediately after sampling the ampoules are flame sealed after a CFC free headspace of pure nitrogen had been applied.The loss of CFCs into the headspace is considered by a careful equilibration between liquid and gas phase under controlled conditions before the sealed ampoules are opened and a precise measurement of the volume of the headspace. The determination of CFC concentrations in the IUP Bremen gas chromatography lab is accomplished by purge and trap sample pre-treatment followed by gas chromatographic (GC) separation on a capillary column and electron capture detection (ECD). The system is calibrated by analyzing several different volumes of a known standard gas. CFC concentrations are calibrated on SIO98 scale (Prinn et al., 2000, doi:10.1029/2000JD900141). A more detailed description of the measurement system is given by Bulsiewicz et at. (1998, doi:10.1029/98JC00140).Accuracy (i.e. uncertainties of calibrated sample volume, calibration curve, extraction efficiency, standard and working gas, water blank, etc.):- CFC-12 < 1.8 %- CFC-11 < 3.1 %Precision (i.e. mean error from 16 replicate samples):- CFC-12 < 0.006 pmol/kg or < 1.2 % (which ever is greater)We do not give a value for the precision of CFC-12. Offline sample chromatograms regularly show a negative peak in the vicinity of the CFC-11 peak, which decreases the accuracy of CFC-11 in comparison to CFC-12, and which does not allow giving an objective estimate of a precision for CFC-11.Sampling on board and measurement of CFCs at the IUP Bremen was funded by the Deutsche Forschungsgemeinschaft within the SPP 1158 "Antarktisforschung", grant RH 25/27. We thank Eberhard Fahrbach, Gerd Rohardt, Mario Hoppema and the scientific party to participate in the ANT-XXII/3 expedition and for the excellent assistance and cooperation on board. We further thank the master and crew of RV Polarstern.CFC measurements: Klaus BulsiewiczQuality flags: ? = doubtful; / = bad; # = mean of replicates Dataset Antarktis* DataCite Metadata Store (German National Library of Science and Technology) Gerd ENVELOPE(-45.750,-45.750,-60.666,-60.666) Klaus ENVELOPE(24.117,24.117,65.717,65.717) |
institution |
Open Polar |
collection |
DataCite Metadata Store (German National Library of Science and Technology) |
op_collection_id |
ftdatacite |
language |
English |
topic |
Event label Date/Time of event Latitude of event Longitude of event Elevation of event DEPTH, water Freon-11 trichorofluoromethane Freon-12 dichlorodifluoromethane Bottle number CTD/Rosette Gas chromatography ANT-XXII/3 Polarstern |
spellingShingle |
Event label Date/Time of event Latitude of event Longitude of event Elevation of event DEPTH, water Freon-11 trichorofluoromethane Freon-12 dichlorodifluoromethane Bottle number CTD/Rosette Gas chromatography ANT-XXII/3 Polarstern Huhn, Oliver Rhein, Monika Hoppema, Mario van Heuven, Steven Chlorofluorocarbons measured on water bottle samples during POLARSTERN cruise ANT-XXII/3 |
topic_facet |
Event label Date/Time of event Latitude of event Longitude of event Elevation of event DEPTH, water Freon-11 trichorofluoromethane Freon-12 dichlorodifluoromethane Bottle number CTD/Rosette Gas chromatography ANT-XXII/3 Polarstern |
description |
During the expedition a total of 800 samples on 60 CTD stations were collected for chlorofluorocarbons (CFC-11 and CFC-12), of which 723 where successfully analysed. The water samples from the rosette system were collected into 100 ml glass ampoules and sealed off after a CFC free headspace of pure nitrogen had been applied.The Chlorofluorocarbon (CFC-11 and CFC-12) water samples from the CTD-bottle-system are stored in glass ampoules without contact to the atmosphere during the tapping. Immediately after sampling the ampoules are flame sealed after a CFC free headspace of pure nitrogen had been applied.The loss of CFCs into the headspace is considered by a careful equilibration between liquid and gas phase under controlled conditions before the sealed ampoules are opened and a precise measurement of the volume of the headspace. The determination of CFC concentrations in the IUP Bremen gas chromatography lab is accomplished by purge and trap sample pre-treatment followed by gas chromatographic (GC) separation on a capillary column and electron capture detection (ECD). The system is calibrated by analyzing several different volumes of a known standard gas. CFC concentrations are calibrated on SIO98 scale (Prinn et al., 2000, doi:10.1029/2000JD900141). A more detailed description of the measurement system is given by Bulsiewicz et at. (1998, doi:10.1029/98JC00140).Accuracy (i.e. uncertainties of calibrated sample volume, calibration curve, extraction efficiency, standard and working gas, water blank, etc.):- CFC-12 < 1.8 %- CFC-11 < 3.1 %Precision (i.e. mean error from 16 replicate samples):- CFC-12 < 0.006 pmol/kg or < 1.2 % (which ever is greater)We do not give a value for the precision of CFC-12. Offline sample chromatograms regularly show a negative peak in the vicinity of the CFC-11 peak, which decreases the accuracy of CFC-11 in comparison to CFC-12, and which does not allow giving an objective estimate of a precision for CFC-11.Sampling on board and measurement of CFCs at the IUP Bremen was funded by the Deutsche Forschungsgemeinschaft within the SPP 1158 "Antarktisforschung", grant RH 25/27. We thank Eberhard Fahrbach, Gerd Rohardt, Mario Hoppema and the scientific party to participate in the ANT-XXII/3 expedition and for the excellent assistance and cooperation on board. We further thank the master and crew of RV Polarstern.CFC measurements: Klaus BulsiewiczQuality flags: ? = doubtful; / = bad; # = mean of replicates |
format |
Dataset |
author |
Huhn, Oliver Rhein, Monika Hoppema, Mario van Heuven, Steven |
author_facet |
Huhn, Oliver Rhein, Monika Hoppema, Mario van Heuven, Steven |
author_sort |
Huhn, Oliver |
title |
Chlorofluorocarbons measured on water bottle samples during POLARSTERN cruise ANT-XXII/3 |
title_short |
Chlorofluorocarbons measured on water bottle samples during POLARSTERN cruise ANT-XXII/3 |
title_full |
Chlorofluorocarbons measured on water bottle samples during POLARSTERN cruise ANT-XXII/3 |
title_fullStr |
Chlorofluorocarbons measured on water bottle samples during POLARSTERN cruise ANT-XXII/3 |
title_full_unstemmed |
Chlorofluorocarbons measured on water bottle samples during POLARSTERN cruise ANT-XXII/3 |
title_sort |
chlorofluorocarbons measured on water bottle samples during polarstern cruise ant-xxii/3 |
publisher |
PANGAEA - Data Publisher for Earth & Environmental Science |
publishDate |
2013 |
url |
https://dx.doi.org/10.1594/pangaea.770667 https://doi.pangaea.de/10.1594/PANGAEA.770667 |
long_lat |
ENVELOPE(-45.750,-45.750,-60.666,-60.666) ENVELOPE(24.117,24.117,65.717,65.717) |
geographic |
Gerd Klaus |
geographic_facet |
Gerd Klaus |
genre |
Antarktis* |
genre_facet |
Antarktis* |
op_relation |
https://dx.doi.org/10.1594/pangaea.787532 https://dx.doi.org/10.1016/j.dsr.2013.01.005 |
op_rights |
Creative Commons Attribution 3.0 Unported https://creativecommons.org/licenses/by/3.0/legalcode cc-by-3.0 |
op_rightsnorm |
CC-BY |
op_doi |
https://doi.org/10.1594/pangaea.770667 https://doi.org/10.1594/pangaea.787532 https://doi.org/10.1016/j.dsr.2013.01.005 |
_version_ |
1766287322109706240 |