The last Eurasian ice sheets - a chronological database and time-slice reconstruction, DATED-1
TLDR
In this paper, the authors present a new time-slice reconstruction of the Eurasian ice sheets (British-Irish, Svalbard-Barents-Kara Seas and Scandinavian) documenting the spatial evolution of these interconnected ice sheets every 1000 years from 25 to 10 years and at four selected time periods back to 40 years.Abstract:
We present a new time-slice reconstruction of the Eurasian ice sheets (British–Irish, Svalbard–Barents–Kara Seas and Scandinavian) documenting the spatial evolution of these interconnected ice sheets every 1000 years from 25 to 10 ka, and at four selected time periods back to 40 ka. The time-slice maps of ice-sheet extent are based on a new Geographical Information System (GIS) database, where we have collected published numerical dates constraining the timing of ice-sheet advance and retreat, and additionally geomorphological and geological evidence contained within the existing literature. We integrate all uncertainty estimates into three ice-margin lines for each time-slice; a most-credible line, derived from our assessment of all available evidence, with bounding maximum and minimum limits allowed by existing data. This approach was motivated by the demands of glaciological, isostatic and climate modelling and to clearly display limitations in knowledge. The timing of advance and retreat were both remarkably spatially variable across the ice-sheet area. According to our compilation the westernmost limit along the British–Irish and Norwegian continental shelf was reached up to 7000 years earlier (at c. 27–26 ka) than the eastern limit on the Russian Plain (at c. 20–19 ka). The Eurasian ice sheet complex as a whole attained its maximum extent (5.5 Mkm2) and volume (~24 m Sea Level Equivalent) at c. 21 ka. Our continental-scale approach highlights instances of conflicting evidence and gaps in the ice-sheet chronology where uncertainties remain large and should be a focus for future research. Largest uncertainties coincide with locations presently below sea level and where contradicting evidence exists. This first version of the database and time-slices (DATED-1) has a census date of 1 January 2013 and both are available to download via the Bjerknes Climate Data Centre and PANGAEA (www.bcdc.no; http://doi.pangaea.de/10.1594/PANGAEA.848117).read more
Citations
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The configuration of Northern Hemisphere ice sheets through the Quaternary.
Christine Batchelor,Martin Margold,Mario Krapp,Della K. Murton,April S. Dalton,Philip L. Gibbard,Chris R. Stokes,Julian B. Murton,Andrea Manica +8 more
TL;DR: A synthesis of empirical data and numerical modelling results related to pre-LGM ice sheets to produce new hypotheses regarding their extent in the Northern Hemisphere at 17 time-slices that span the Quaternary shows pronounced ice-sheet asymmetry within the last glacial cycle and significant variations in ice-marginal positions between older glacial cycles.
Journal ArticleDOI
Deglaciation of the Eurasian ice sheet complex.
Henry Patton,Alun Hubbard,Karin Andreassen,Amandine Auriac,Pippa L. Whitehouse,Arjen P. Stroeven,Calvin Shackleton,Monica Winsborrow,Jakob Heyman,Adrian M. Hall +9 more
TL;DR: In this article, a first-order thermomechanical ice sheet model was applied to investigate the retreat of the EISC after 23 ka BP, directly extending the work of Patton et al. (2016) who modelled the build-up to its maximum extent.
Journal ArticleDOI
Massive blow-out craters formed by hydrate-controlled methane expulsion from the Arctic seafloor
Karin Andreassen,Alun Hubbard,Monica Winsborrow,Henry Patton,Sunil Vadakkepuliyambatta,Andreia Plaza-Faverola,Eythor Gudlaugsson,Pavel Serov,A. Deryabin,Rune Mattingsdal,Jürgen Mienert,Stefan Bünz +11 more
TL;DR: It is proposed that the thinning of the ice sheet at the end of recent glacial cycles decreased the pressure on pockets of hydrates buried in the seafloor, resulting in explosive blow-outs that created the giant craters and released large quantities of methane into the water above.
Journal ArticleDOI
An updated radiocarbon-based ice margin chronology for the last deglaciation of the North American Ice Sheet Complex
April S. Dalton,April S. Dalton,Martin Margold,Chris R. Stokes,Lev Tarasov,Arthur S. Dyke,Arthur S. Dyke,Roberta S. Adams,Serge Allard,Heather E. Arends,Nigel Atkinson,John W. Attig,Peter J. Barnett,Robert L. Barnett,Robert L. Barnett,Martin Batterson,Pascal Bernatchez,Harold W. Borns,Andy Breckenridge,Jason P. Briner,Etienne Brouard,Etienne Brouard,Janet E. Campbell,Anders E. Carlson,John J. Clague,B. Brandon Curry,Robert André Daigneault,Hugo Dubé-Loubert,Hugo Dubé-Loubert,Don J. Easterbrook,David A. Franzi,Hannah G. Friedrich,Svend Funder,Michelle S. Gauthier,Angela S. Gowan,Kenneth L. Harris,Bernard Hétu,Tom S. Hooyer,Carrie Jennings,Mark D. Johnson,Alan E. Kehew,Samuel E. Kelley,Daniel Kerr,Edward L. King,Kristian K. Kjeldsen,Alan R. Knaeble,Patrick Lajeunesse,Thomas R. Lakeman,Michel Lamothe,Phillip C Larson,Martin Lavoie,Henry M. Loope,Thomas V. Lowell,Barbara A. Lusardi,Lorraine Manz,Isabelle McMartin,F. Chantel Nixon,Serge Occhietti,Michael A. Parkhill,David J.W. Piper,Antonius G. Pronk,Pierre J. H. Richard,John C. Ridge,Martin Ross,Martin Roy,Allen Seaman,John Shaw,Rudolph R. Stea,James T. Teller,Woodrow B Thompson,L. Harvey Thorleifson,D J Utting,Jean J. Veillette,Brent Ward,Thomas K. Weddle,Herbert E. Wright +75 more
TL;DR: The most up-to-date and authoritative margin chronology for the entire ice sheet complex is featured in two publications (Geological Survey of Canada Open File 1574 [Dyke et al., 2003] and as mentioned in this paper ).
Journal ArticleDOI
Population genomics of Mesolithic Scandinavia: Investigating early postglacial migration routes and high-latitude adaptation.
Torsten Günther,Helena Malmström,Emma M. Svensson,Ayça Omrak,Federico Sánchez-Quinto,Gülşah Merve Kılınç,Gülşah Merve Kılınç,Gülşah Merve Kılınç,Maja Krzewińska,Gunilla Eriksson,Magdalena Fraser,Hanna Edlund,Arielle R. Munters,Alexandra Coutinho,Luciana G. Simões,Mário Vicente,Anders Sjölander,Berit J. Sellevold,Roger Jørgensen,Peter Claes,Mark D. Shriver,Cristina Valdiosera,Mihai G. Netea,Jan Apel,Kerstin Lidén,Kerstin Lidén,Birgitte Skar,Jan Storå,Anders Götherström,Mattias Jakobsson +29 more
TL;DR: The authors' results suggest two different early postglacial migrations into Scandinavia: initially from the south, and later, from the northeast, which followed the ice-free Norwegian north Atlantic coast, along which novel and advanced pressure-blade stone-tool techniques may have spread.
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