Bock, Michael; Schmitt, Jochen; Beck, Jonas; Seth, Barbara; Chappellaz, Jérôme A; Fischer, Hubertus (2017): Stable isotopic methane (δ¹³CH4) records of ice core EDC [dataset]. PANGAEA, https://doi.org/10.1594/PANGAEA.873913, In supplement to: Bock, M et al. (2017): Glacial/interglacial wetland, biomass burning, and geologic methane emissions constrained by dual stable isotopic CH4 ice core records. Proceedings of the National Academy of Sciences, 201613883, https://doi.org/10.1073/pnas.1613883114
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Coverage:
Latitude: -75.100000 * Longitude: 123.350000
Date/Time Start: 1993-01-01T00:00:00 * Date/Time End: 2004-12-31T00:00:00
Minimum DEPTH, ice/snow: 509.30 m * Maximum DEPTH, ice/snow: 2805.97 m
Event(s):
EDC (EPICA Dome C) * Latitude: -75.100000 * Longitude: 123.350000 * Date/Time Start: 1993-01-01T00:00:00 * Date/Time End: 2004-12-31T00:00:00 * Elevation: 3233.0 m * Recovery: 3300 m * Location: Dome C, Antarctica * Campaign: Dome C * Method/Device: Ice drill (ICEDRILL) * Comment: Drill site is 56 km from the site of a previous Dome C core that provided records extending into the last glacial period, and 560 km from the site of the Vostok cores. The completion of the Dome C core was delayed when the first drilling became stuck at 788 m in 1999 (EDC96).
Comment:
d13CH4 data are measured using the system described in:
Schmitt, J., B. Seth, M. Bock, H. Fischer, "Online technique for isotope and mixing ratios of CH4, N2O, Xe and mixing ratios of organic trace gases on a single ice core sample", Atmospheric Measurement Techniques, 7/8, 2645-2665, 2014, doi:10.5194/amt-7-2645-2014
All data are free of krypton interference during the mass spectrometric analysis. For details see:
Schmitt, J., B. Seth, M. Bock, C. van der Veen, L. Möller, C. J. Sapart, M. Prokopiou, T. Sowers, T. Röckmann, H. Fischer, "On the interference of Kr during carbon isotope analysis of methane using continuous-flow combustion-isotope ratio mass spectrometry", Atmospheric Measurement Techniques, 6/1, 1425-1445, 2013, doi:10.5194/amt-6-1425-2013
Parameter(s):
| # | Name | Short Name | Unit | Principal Investigator | Method/Device | Comment |
|---|---|---|---|---|---|---|
| 1 | DEPTH, ice/snow | Depth ice/snow | m | Bock, Michael | Geocode | |
| 2 | Gas age | Gas age | ka BP | Bock, Michael | AICC2012, BP = 1950 | |
| 3 | Methane mixing ratio | CH4 mix ratio | nmol/mol | Bock, Michael | Determined according to Schmitt et al. (2014) | measured |
| 4 | Methane mixing ratio, standard deviation | CH4 mix ratio std dev | ± | Bock, Michael | Determined according to Schmitt et al. (2014) | Methane mixing ratio error (1-sigma standard deviation of ice core replicates in nmol/mol) |
| 5 | δ13C, methane | δ13C CH4 | ‰ PDB | Bock, Michael | Determined according to Schmitt et al. (2014) | measured, with respect to Vienna Pee Dee Belemnite (VPDB) |
| 6 | δ13C, methane, standard deviation | δ13C CH4 std dev | ± | Bock, Michael | Determined according to Schmitt et al. (2014) | d13CH4 error (1-sigma standard deviation of ice core replicates in per mil with respect to Vienna Pee Dee Belemnite (VPDB)) |
| 7 | Gravitational settling | Grav settl | ‰ | Bock, Michael | see Bock et al. (2017) | see supporting information of Bock et al. (2017) |
| 8 | δ13C, methane | δ13C CH4 | ‰ PDB | Bock, Michael | see Bock et al. (2017) | corrected for gravitational settling in the firn, with respect to Vienna Pee Dee Belemnite (VPDB) |
| 9 | Diffusive fractionation | Diff frac | ‰ | Bock, Michael | see Bock et al. (2017) | see supporting information of Bock et al. (2017) |
| 10 | δ13C, methane | δ13C CH4 | ‰ PDB | Bock, Michael | see Bock et al. (2017) | corrected for gravitational settling and diffusional fractionation in the firn, with respect to Vienna Pee Dee Belemnite (VPDB) |
License:
Creative Commons Attribution-NoDerivs 3.0 Unported (CC-BY-ND-3.0)
Size:
810 data points