Methane in NEEM-2011-S1 ice core from North Greenland, 1800 years continuous record: full dataset, v2

DOI

Description and NotesDescription: 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/

Entire CH4 dataset at 5 s integration time.

Identifier
DOI https://doi.org/10.1594/PANGAEA.899036
Related Identifier https://doi.org/10.1594/PANGAEA.899040
Related Identifier https://doi.org/10.1016/j.epsl.2013.02.034
Related Identifier https://doi.org/10.5194/acp-12-4259-2012
Related Identifier https://doi.org/10.5194/acp-14-3571-2014
Related Identifier https://doi.org/10.1007/s00340-005-1828-z
Related Identifier https://doi.org/10.5194/cp-9-2713-2013
Related Identifier https://doi.org/10.1038/nature14565
Related Identifier https://doi.org/10.5194/amt-5-999-2012
Metadata Access https://ws.pangaea.de/oai/provider?verb=GetRecord&metadataPrefix=datacite4&identifier=oai:pangaea.de:doi:10.1594/PANGAEA.899036
Provenance
Creator Rhodes, Rachael H ORCID logo; Brook, Edward J
Publisher PANGAEA
Publication Year 2019
Funding Reference Agence Nationale de la Recherche https://doi.org/10.13039/501100001665 Crossref Funder ID 07-VULN-09-001 North Greenland Eemian Ice Drilling
Rights Creative Commons Attribution 4.0 International; https://creativecommons.org/licenses/by/4.0/
OpenAccess true
Representation
Resource Type Dataset
Format text/tab-separated-values
Size 175080 data points
Discipline Earth System Research
Spatial Coverage (-51.060 LON, 77.450 LAT); Greenland