Stable oxygen isotope profile of the B21_2012 firn core, annual means

• Main Authors: Freitag, Johannes, Kipfstuhl, Sepp, Weißbach, Stefanie, Karlsson, Nanna Bjørnholt, Münch, Thomas, Hörhold, Maria
• Format: Dataset
• Language: English
• Published: PANGAEA 2021
• Subjects: Age; AWI_Envi; AWI_Glac; AWI Arctic Land Expedition; B21_2012; Calculated; annual mean; FIRNC; firn core; Glaciology @ AWI; GL-Land_2012_NEEM12_NGT12; Greenland; ngt27C94.2-cont; North Greenland Traverse; Polar Terrestrial Environmental Systems @ AWI; stable water isotopes; δ18O; water; Arctic; North Greenland
• Online Access: https://doi.pangaea.de/10.1594/PANGAEA.931704; https://doi.org/10.1594/PANGAEA.931704

Stable oxygen isotopes (δ18O) were measured on discrete samples using Cavity Ring-Down spectroscopy with an L2120-i and L2130-i by Picarro Instruments. The δ18O concentration with depth is provided with a precision of better than 0.1 per mil. 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.