Methane in NEEM-2011-S1 ice core from North Greenland, 1800 years continuous record: Version 2 ...

• Main Authors: Rhodes, Rachael H, Brook, Edward J
• Format: Article in Journal/Newspaper
• Language: English
• Published: PANGAEA 2019
• Subjects: atmospheric composition; biogeochemical cycles; Greenland; Holocene; Ice core; Methane; Ice drill; North Greenland Eemian Ice Drilling NEEM; ice core; North Greenland
• Online Access: https://dx.doi.org/10.1594/pangaea.899040; https://doi.pangaea.de/10.1594/PANGAEA.899040

Changes to original version posted at NOAA (https://www.ncdc.noaa.gov/paleo-search/study/14173): Chronology has been updated to most recent NEEM-2011-S1 ice age and NEEM delta age. Age scale now constructed from annual-layer-counted ice age (Sigl et al., 2015, Nature). Two options for delta age provided a) constant delta age of 188 yr (Buizert et al. 2012, ACP & 2014 corrigendum), b) variable delta age transferred from main NEEM core (Rasmussen et al., 2013, COP) using offsets between GICC05 and NEEM-2011-S1 ice age provided by Sigl et al. 2015. Outliers at 387.2-387.4 m and 335.1-335.3 m depth removed. Publication abstract: Ancient air trapped inside bubbles in ice cores can now be analysed for methane concentration utilising a laser spectrometer coupled to a continuous melter system. We present a new ultra-high resolution record of atmospheric methane variability over the last 1800 yr obtained from continuous analysis of a shallow ice core from the North Greenland Eemian project (NEEM-2011-S1) during a ... : CHANGES TO ORIGINAL VERSION POSTED AT NOAA (https://www.ncdc.noaa.gov/paleo-search/study/14173)* Chronology has been updated to most recent NEEM-2011-S1 ice age and NEEM delta age.* Age scale now constructed from annual-layer-counted ice age (Sigl et al., 2015, Nature).* Two options for delta age provided a) constant delta age of 188 yr (Buizert et al. 2012, ACP & 2014 corrigendum). b) variable delta age transferred from main NEEM core (Rasmussen et al., 2013, COP) using offsets between GICC05 and NEEM-2011-S1 ice age provided by Sigl et al. 2015* Outliers at 387.2-387.4 m and 335.1-335.3 m depth removed. ...