Citation:

PANGAEA.945670

Name: Stable water isotopic concentration profile of the B26_2011 firn core
Published: 2022-06-27
License: https://creativecommons.org/licenses/by/4.0/
Keywords: density; firn core; North Greenland Traverse; stable water isotopes

Always quote citation above when using data! You can download the citation in several formats below.

Published: 2022-06-27 • DOI registered: 2022-07-27

RIS Citation BibTeX Citation Text Citation Copy Citation ShareShow Map Google Earth 10 3 1

Abstract:

The firn core array of the North Greenland Traverse (NGT) provides unique climatic information for North Greenland until the mid 1990ies. In order to extend this climate record into more recent time, some of the drill sites were revisited and extension cores were drilled. The record is a composite of snow liners (from the surface to 1.29 m depth) and a consecutive firn core from 1.47 m depth to 30.00 m depth with a diameter of 75 cm. Density was measured by weighing the 55 cm long bags. Stable oxygen isotopes (δ18O) were measured at the Niels Bohr Institute, Copenhagen, Denmark. Using raw, un-calibrated dielectrical profiling (DEP) data from the field (NEEM Set-up), volcanic tie points were derived. Together with the smoothed density data and the isotopic composition the record was dated by layer counting. The annual mean values of δ18O were obtained based on this dating. Based on the density measurements and the dating, the annual accumulation rate in water equivalent depth was derived.

Keyword(s):

density; firn core; North Greenland Traverse; stable water isotopes

Supplement to:

Buchardt, Susanne L; Clausen, Henrik Brink; Vinther, Bo Møllesøe; Dahl-Jensen, Dorthe (2012): Investigating the past and recent δ18O-accumulation relationship seen in Greenland ice cores. Climate of the Past, 8(6), 2053-2059, https://doi.org/10.5194/cp-8-2053-2012

Hörhold, Maria; Münch, Thomas; Weißbach, Stefanie; Kipfstuhl, Sepp; Freitag, Johannes; Sasgen, Ingo; Lohmann, Gerrit; Vinther, Bo Møllesøe; Laepple, Thomas (2023): Modern temperatures in central–north Greenland warmest in past millennium. Nature, 613(7944), 503-507, https://doi.org/10.1038/s41586-022-05517-z

Project(s):

Glaciology @ AWI (AWI_Glac)

North Greenland Eemian Ice Drilling (NEEM)

Polar Terrestrial Environmental Systems @ AWI (AWI_Envi)

Funding:

Agence Nationale de la Recherche (ANR), grant/award no. 07-VULN-09-001: North Greenland Eemian Ice Drilling

Coverage:

Latitude: 77.253300 * Longitude: -49.216700

Date/Time Start: 2011-05-01T00:00:00 * Date/Time End: 2011-08-31T00:00:00

Minimum DEPTH, ice/snow: 1.475 m * Maximum DEPTH, ice/snow: 29.925 m

Event(s):

B26_2011 * Latitude: 77.253300 * Longitude: -49.216700 * Date/Time Start: 2011-05-01T00:00:00 * Date/Time End: 2011-08-31T00:00:00 * Location: Greenland * Method/Device: Firn corer (FIRNC)

Parameter(s):