Varying regional δ¹⁸O-temperature relationship in high resolution stable water isotopes from East Greenland ...

• Main Authors: Holme, Christian T, Gkinis, Vasileios, Lanzky, Mika, Morris, Valerie, Olesen, Martin, Thayer, Abigail, Vaughn, Bruce H, Vinther, Bo Møllesøe
• Format: Article in Journal/Newspaper
• Language: English
• Published: PANGAEA 2019
• Subjects: climate; diffusion; Greenland; paleoclimatology; Temperature; water isotopes; Arctic Sea Ice and Greenland Ice Sheet Sensitivity ice2ice; Arctic; East Greenland; ice core; Ice Sheet; Sea ice
• Online Access: https://dx.doi.org/10.1594/pangaea.901850; https://doi.pangaea.de/10.1594/PANGAEA.901850

This study examines the stable water isotope signal (δ18O) of three ice cores drilled on the Renland peninsula (East Greenland coast). While ice core δ18O measurements qualitatively are a measure of the local temperature history, the δ18O variability in precipitation actually reflects the integrated hydrological activity that the deposited ice experienced from the evaporation source to the condensation site. Thus, as Renland is located next to a fluctuating sea ice cover, the transfer function used to infer past temperatures from the δ18O variability is potentially influenced by variations in the local moisture conditions. The objective of this study is therefore to evaluate the δ18O variability of ice cores drilled on Renland and examine what amount of the signal that can be attributed to regional temperature variations. In the analysis, three ice cores are utilized to create stacked summer, winter and annually averaged δ18O signals (AD 1801-2014). The imprint of temperature on δ18O is first examined by ... : Supplement to: Holme, Christian T; Gkinis, Vasileios; Lanzky, Mika; Morris, Valerie; Olesen, Martin; Thayer, Abigail; Vaughn, Bruce H; Vinther, Bo Møllesøe (2019): Varying regional δ18O–temperature relationship in high-resolution stable water isotopes from east Greenland. Climate of the Past, 15(3), 893-912 ...