Articles | Volume 15, issue 2
https://doi.org/10.5194/cp-15-751-2019
https://doi.org/10.5194/cp-15-751-2019
Research article
 | 
10 Apr 2019
Research article |  | 10 Apr 2019

A 2700-year annual timescale and accumulation history for an ice core from Roosevelt Island, West Antarctica

Mai Winstrup, Paul Vallelonga, Helle A. Kjær, Tyler J. Fudge, James E. Lee, Marie H. Riis, Ross Edwards, Nancy A. N. Bertler, Thomas Blunier, Ed J. Brook, Christo Buizert, Gabriela Ciobanu, Howard Conway, Dorthe Dahl-Jensen, Aja Ellis, B. Daniel Emanuelsson, Richard C. A. Hindmarsh, Elizabeth D. Keller, Andrei V. Kurbatov, Paul A. Mayewski, Peter D. Neff, Rebecca L. Pyne, Marius F. Simonsen, Anders Svensson, Andrea Tuohy, Edwin D. Waddington, and Sarah Wheatley

Data sets

Roosevelt Island Climate Evolution (RICE) ice core: The RICE17 chronology and accumulation record for the past 2700 years M. Winstrup https://doi.org/10.1594/PANGAEA.899147

The Roosevelt Island Ice Core Chronology 2017 (RICE17) M. Winstrup and J. E. Lee https://doi.org/10.1594/PANGAEA.899571

Water isotopes and total beta activity, Roosevelt Island firn cores (1974/75; 1976/77) H. Brink Clausen and M. Winstrup https://doi.org/10.1594/PANGAEA.899157

Roosevelt Island: Radar and GPS H. Conway https://doi.org/10.15784/601070

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Short summary
We present a 2700-year timescale and snow accumulation history for an ice core from Roosevelt Island, Ross Ice Shelf, Antarctica. We observe a long-term slightly decreasing trend in accumulation during most of the period but a rapid decline since the mid-1960s. The latter is linked to a recent strengthening of the Amundsen Sea Low and the expansion of regional sea ice. The year 1965 CE may thus mark the onset of significant increases in sea-ice extent in the eastern Ross Sea.