Atmospheric methane across the Last Glacial Maximum from the West Antarctic Ice Sheet (WAIS) Divide, North Greenland Eemian Ice Drilling (NEEM), and Greenland Ice Sheet Project Two (GISP2) ice cores. ...

• Main Authors: Riddell-Young, Benjamin, Brook, Ed
• Format: Dataset
• Language: English
• Published: NSF Arctic Data Center 2023
• Subjects: Methane; Paleoclimate; Antarctica; Greenhouse gases; Greenland; Antarctic; West Antarctic Ice Sheet; Antarc*; Greenland Ice Sheet Project; ice core; Ice Sheet; North Greenland
• Online Access: https://dx.doi.org/10.18739/a2zc7rw3h; https://arcticdata.io/catalog/view/doi:10.18739/A2ZC7RW3H

This dataset includes measurements of atmospheric methane from samples from the North Greenland Eemian Ice Drilling (NEEM), Greenland Ice Sheet Project Two (GISP2) and West Antarctic Ice Sheet (WAIS) Divide ice cores. All measurements were made at the Oregon State University Ice Core and Quaternary Geochemistry Laboratory (Corvallis, OR) using an established analytical system. 433 samples from the NEEM ice core were measured between 1420 and 1560 meter depths. A measurement uncertainty ranging from 2.8 to 4.2 parts per billion (ppb), depending on the measurement year, was determined from replicate samples. 340 samples from the GISP2 ice core were measured between 1740 and 2060 meter depths. A measurement uncertainty ranging from 3.1 to 3.4 ppb, depending on the measurement year, was determined from replicate samples. All GISP2 and NEEM data were corrected for excess methane contamination using the established relationship between excess methane and Ca2+ (Lee et al., 2020). Both corrected and uncorrected data ...