Greenland Ice Sheet Project Two (GISP2) ice core methane (CH4) and nitrogen isotopic composition (d15N-N2), 13-50 ka BP

We present high resolution measurements of atmospheric methane (CH4) and nitrogen isotopic composition (d15N-N2) in the Greenland Ice Sheet Project Two (GISP2) Ice core. The data span Marine Isotope Stage 3, 13 to 50 thousand years (ka) before present. These datasets enhance our understanding of abr...

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Bibliographic Details
Main Author: Christo Buizert
Format: Dataset
Language:unknown
Published: Arctic Data Center 2022
Subjects:
ICE CORE RECORDS
METHANE
NITROGEN ISOTOPES
GREENLAND
GISP2
Greenland
Antarc*
Antarctica
Greenland Ice Sheet Project
ice core
Ice Sheet
Online Access:https://doi.org/10.18739/A2639K65M
Description
Summary:We present high resolution measurements of atmospheric methane (CH4) and nitrogen isotopic composition (d15N-N2) in the Greenland Ice Sheet Project Two (GISP2) Ice core. The data span Marine Isotope Stage 3, 13 to 50 thousand years (ka) before present. These datasets enhance our understanding of abrupt climate variability during the last glacial period, with a focus on Heinrich events 1 through 5. CH4 data were analyzed between 2014 and 2020 via an established wet extraction technique (Mitchell et al. 2013). Concentrations were determined via gas chromatography measurements on an Agilent 6890N and calibrated to the NOAA04 scale. d15N-N2 data were measured between 2017 and 2020 on a Finnigan MAT Delta XP via an established technique (Petrenko et al. 2006). The methane data allow for gas-phase synchronization of the GISP2 ice core to other polar ice cores from Greenland and Antarctica. The nitrogen isotopic composition data allow for reconstruction of abrupt Greenland surface climate variations.

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