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| Small, David; Rinterknecht, Vincent; Austin, William E. N.; Bates, Richard; Benn, Douglas I.; Scourse, James D.; Bourles, Didier L.; Hibbert, Fiona D.. |
| Geochronological constraints on the deglaciation of former marine based ice streams provide information on the rates and modes by which marine based ice sheets have responded to external forcing factors such as climate change. This paper presents new 36Cl cosmic ray exposure dating from boulders located on two moraines (Glen Brittle and Loch Scavaig) in southern Skye, northwest Scotland. Ages from the Glen Brittle moraines constrain deglaciation of a major marine terminating ice stream, the Barra-Donegal Ice Stream that drained the former British-Irish Ice Sheet, depending on choice of production method and scaling model this occurred 19.9 ± 1.5–17.6 ± 1.3 ka ago. We compare this timing of deglaciation to existing geochronological data and changes in a... |
| Tipo: Text |
Palavras-chave: Deglaciation; Scotland; Cosmogenic exposure ages; Chlorine-36. |
| Ano: 2016 |
URL: https://archimer.ifremer.fr/doc/00349/46010/83047.pdf |
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| Trofimova, Tamara; Alexandroff, Stella J.; Mette, Madelyn; Tray, Elizabeth; Butler, Paul G.; Campana, Steven; Harper, Elizabeth; Johnson, Andrew L.a.; Morrongiello, John R.; Peharda, Melita; Schöne, Bernd R.; Andersson, Carin; Andrus, C. Fred T.; Black, Bryan A.; Burchell, Meghan; Carroll, Michael L.; Delong, Kristine L.; Gillanders, Bronwyn M.; Grønkjær, Peter; Killam, Daniel; Prendergast, Amy L.; Reynolds, David J.; Scourse, James D.; Shirai, Kotaro; Thébault, Julien; Trueman, Clive; De Winter, Niels. |
| Horizon scanning is an increasingly common strategy to identify key research needs and frame future agendas in science. Here, we present the results of the first such exercise for the field of sclerochronology, thereby providing an overview of persistent and emergent research questions that should be addressed by future studies. Through online correspondence following the 5th International Sclerochronology Conference in 2019, participants submitted and rated questions that addressed either knowledge gaps or promising applications of sclerochronology. An initial list of 130 questions was compiled based on contributions of conference attendees and reviewed by expert panels formed during the conference. Herein, we present and discuss the 50 questions rated to... |
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| Ano: 2020 |
URL: https://archimer.ifremer.fr/doc/00648/76030/76938.pdf |
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| Wanamaker, Alan D., Jr.; Butler, Paul G; Scourse, James D.; Heinemeier, Jan; Eiriksson, Jon; Knudsen, Karen Luise; Richardson, Christopher A.. |
| Despite numerous investigations, the dynamical origins of the Medieval Climate Anomaly and the Little Ice Age remain uncertain. A major unresolved issue relating to internal climate dynamics is the mode and tempo of Atlantic meridional overturning circulation variability, and the significance of decadal-to-centennial scale changes in Atlantic meridional overturning circulation strength in regulating the climate of the last millennium. Here we use the time-constrained high-resolution local radiocarbon reservoir age offset derived from an absolutely dated annually resolved shell chronology spanning the past 1,350 years, to reconstruct changes in surface ocean circulation and climate. The water mass tracer data presented here from the North Icelandic shelf,... |
| Tipo: Text |
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| Ano: 2012 |
URL: https://archimer.ifremer.fr/doc/00265/37651/36977.pdf |
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