Rhodes, Rachael H; Brook, Edward J (2019): Methane in NEEM-2011-S1 ice core from North Greenland, 1800 years continuous record: full dataset, v2 [dataset]. PANGAEA, https://doi.org/10.1594/PANGAEA.899036, In supplement to: Rhodes, Rachael H; Faïn, Xavier; Stowasser, Christopher; Blunier, Thomas; Chappellaz, Jérôme A; McConnell, Joseph R; Romanini, Daniele; Mitchell, Logan E; Brook, Edward J (2013): Continuous methane measurements from a late Holocene Greenland ice core: Atmospheric and in-situ signals. Earth and Planetary Science Letters, 368, 9-19, https://doi.org/10.1016/j.epsl.2013.02.034
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Abstract:
Description and Notes
Description: Methane concentration from the Greenland NEEM-2011-S1 Ice Core from 71 to 408m depth (~270-1961 CE).
Methane concentrations analysed online by laser spectrometer (SARA, Spectroscopy by Amplified Resonant Absorption, developed at Laboratoire Interdisciplinaire de Physique, Grenoble, France) on gas extracted from an ice core processed using a continuous melter system (Desert Research Institute). Methane data have a 5 second integration time (raw data acquisition rate 0.6 Hz). Analytical precision, from Allan Variance test, is 0.9 ppb (2 sigma). Long-term reproducibility is 2.6% (2 sigma). Gaps in the record are due to problems during online analysis. Online analysis conducted August-September 2011.
Note: Lat-Long provided is for main NEEM borehole. The NEEM-2011-S1 core was drilled 200 m distance away in 2011 to 410 m depth.
Methane concentrations are reported on NOAA2004 scale (instrument calibrated on dry synthetic air standards).
A correction factor of 1.079 has been applied to all data to correct for methane dissolution in melted ice core sample prior to gas extraction. Correction factor calculated using empirical data (concentrations not aligned/tied to existing discrete methane measurements).
Additional methods description provided in:
* Stowasser, C., Buizert, C., Gkinis, V., Chappellaz, J., Schupbach, S., Bigler, M., Fain, X., Sperlich, P., Baumgartner, M., Schilt, A., Blunier, T., 2012. Continuous measurements of methane mixing ratios from ice cores. Atmos. Meas. Tech. 5, 999-1013.
* Morville, J., Kassi, S., Chenevier, M., Romanini, D., 2005. Fast, low-noise, mode bymode, cavity-enhanced absorption spectroscopy by diode-laser self-locking. Appl. Phys. B Lasers Opt. 80, 1027-01038.
* NEEM (North Greenland Eemian Ice Drilling) project information http://neem.dk/
Further details:
Buizert, Christo; Martinerie, Patricia; Petrenko, Vasilii V; Severinghaus, Jeffrey P; Trudinger, Cathy M; Witrant, Emmanuel; Rosen, Julia L; Orsi, Anais J; Rubino, Mauro; Etheridge, David; Steele, L P; Hogan, Chad M; Laube, J C; Sturges, William T; Levchenko, Oleg V; Smith, Abigail M; Levin, Ingeborg; Conway, Thomas J; Dlugokencky, Edward J; Lang, Patricia M; Kawamura, K; Jenk, Theo M; White, James W C; Sowers, Todd A; Schwander, Jakob; Blunier, Thomas (2012): Gas transport in firn: multiple-tracer characterisation and model intercomparison for NEEM, Northern Greenland. Atmospheric Chemistry and Physics, 12(9), 4259-4277, https://doi.org/10.5194/acp-12-4259-2012
Buizert, Christo; Martinerie, Patricia; Petrenko, Vasilii V; Severinghaus, Jeffrey P; Trudinger, Cathy M; Witrant, Emmanuel; Rosen, Julia L; Orsi, Anais J; Rubino, Mauro; Etheridge, David; Steele, L P; Hogan, Chad M; Laube, J C; Sturges, William T; Levchenko, Oleg V; Smith, Abigail M; Levin, Ingeborg; Conway, Thomas J; Dlugokencky, Edward J; Lang, Patricia M; Kawamura, K; Jenk, Theo M; White, James W C; Sowers, Todd A; Schwander, Jakob; Blunier, Thomas (2014): Corrigendum to ''Gas transport in firn: multiple-tracer characterisation and model intercomparison for NEEM, Northern Greenland'' published in Atmos. Chem. Phys., 12, 4259–-4277, 2012. Atmospheric Chemistry and Physics, 14(7), 3571-3572, https://doi.org/10.5194/acp-14-3571-2014
Morville, J; Kassi, S; Chenevier, M; Romanini, Daniele (2005): Fast, low-noise, mode-by-mode, cavity-enhanced absorption spectroscopy by diode-laser self-locking. Applied Physics B-Lasers and Optics, 80(8), 1027-1038, https://doi.org/10.1007/s00340-005-1828-z
Rasmussen, Sune Olander; Abbott, Peter M; Blunier, Thomas; Bourne, Mark; Brook, Edward J; Buchardt, Susanne L; Buizert, Christo; Chappellaz, Jérôme A; Clausen, Henrik Brink; Cook, Eliza; Dahl-Jensen, Dorthe; Davies, Siwan M; Guillevic, Myriam; Kipfstuhl, Sepp; Laepple, Thomas; Seierstad, Inger K; Severinghaus, Jeffrey P; Steffensen, Jørgen Peder; Stowasser, Christopher; Svensson, Anders M; Vallelonga, Paul T; Vinther, Bo Møllesøe; Wilhelms, Frank; Winstrup, Mai (2013): A first chronology for the North Greenland Eemian Ice Drilling (NEEM) ice core. Climate of the Past, 9(6), 2713-2730, https://doi.org/10.5194/cp-9-2713-2013
Sigl, Michael; Winstrup, Mai; McConnell, Joseph R; Welten, Kees C; Plunkett, Gill; Ludlow, F; Büntgen, Ulf; Caffee, Marc W; Chellman, Nathan J; Dahl-Jensen, Dorthe; Fischer, H; Kipfstuhl, Sepp; Kostick, C; Maselli, Olivia J; Mekhaldi, Florian; Mulvaney, Robert; Muscheler, Raimund; Pasteris, Daniel R; Pilcher, John R; Salzer, Matthew W; Schüpbach, Simon; Steffensen, J P; Vinther, Bo Møllesøe; Woodruff, Thomas E (2015): Timing and climate forcing of volcanic eruptions for the past 2,500 years. Nature, 523(7562), 543-549, https://doi.org/10.1038/nature14565
Stowasser, Christopher; Buizert, Christo; Gkinis, Vasileios; Chappellaz, Jérôme A; Schüpbach, Simon; Bigler, Matthias; Faïn, Xavier; Sperlich, Peter; Baumgartner, M; Schilt, Adrian; Blunier, Thomas (2012): Continuous measurements of methane mixing ratios from ice cores. Atmospheric Measurement Techniques, 5(5), 999-1013, https://doi.org/10.5194/amt-5-999-2012
Project(s):
Funding:
Agence Nationale de la Recherche (ANR), grant/award no. 07-VULN-09-001: North Greenland Eemian Ice Drilling
Coverage:
Latitude: 77.450000 * Longitude: -51.060000
Minimum DEPTH, ice/snow: 71.098 m * Maximum DEPTH, ice/snow: 408.960 m
Event(s):
Comment:
Entire CH4 dataset at 5 s integration time.
Parameter(s):
| # | Name | Short Name | Unit | Principal Investigator | Method/Device | Comment |
|---|---|---|---|---|---|---|
| 1 | DEPTH, ice/snow | Depth ice/snow | m | Rhodes, Rachael H | Geocode | |
| 2 | Age | Age | a AD/CE | Rhodes, Rachael H | Ice age (yr CE) (Sigl et al. 2015) | |
| 3 | AGE | Age | ka BP | Rhodes, Rachael H | Age, calculated from a AD | Geocode – calculated from Ice age (yr CE) (Sigl et al. 2015) |
| 4 | Age | Age | a AD/CE | Rhodes, Rachael H | Gas age (yr CE) (constant delta age, Buizert et al. 2012, 2014) | |
| 5 | Age | Age | a AD/CE | Rhodes, Rachael H | Gas age (yr CE) (variable delta age, Rasmussen et al. 2013) | |
| 6 | Methane | CH4 | ppbv | Rhodes, Rachael H | see abstract | Entire CH4 dataset |
License:
Creative Commons Attribution 4.0 International (CC-BY-4.0)
Size:
175080 data points
Download Data
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