Reaction of a polar gravel‐spit system to atmospheric warming and glacier retreat as reflected by morphology and internal sediment geometries (South Shetland Islands, Antarctica)

Pablo Heredia Barión; Sebastian Lindhorst; Ilona Schutter; Ulrike Falk; Gerhard Kuhn

doi:10.1002/esp.4565

journal article Open Access Jan 21, 2019

Reaction of a polar gravel‐spit system to atmospheric warming and glacier retreat as reflected by morphology and internal sediment geometries (South Shetland Islands, Antarctica)

Pablo Heredia Barión

Sebastian Lindhorst Ilona Schutter Ulrike Falk Gerhard Kuhn

Earth Surface Processes and Landforms Vol. 44 No. 5 pp. 1148-1162 · Wiley

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Abstract

AbstractSedimentary architecture and morphogenetic evolution of a polar bay‐mouth gravel‐spit system are revealed based on topographic mapping, sedimentological data, radiocarbon dating and ground‐penetrating radar investigations. Data document variable rates of spit progradation in reaction to atmospheric warming synchronous to the termination of the last glacial re‐advance (LGR, 0.45–0.25 ka BP), the southern hemisphere equivalent of the Little Ice Age cooling period. Results show an interruption of spit progradation that coincides with the proposed onset of accelerated isostatic rebound in reaction to glacier retreat. Spit growth resumed in the late 19th century after the rate of isostatic rebound decreased, and continues until today. The direction of modern spit progradation, however, is rotated northwards compared with the growth axis of the early post‐LGR spit. This is interpreted to reflect the shift and strengthening in the regional wind field during the last century. A new concept for the interplay of polar gravel‐spit progradation and glacio‐isostatic adjustment is presented, allowing for the prediction of future coastal evolution in comparable polar settings. © 2018 The Authors. Earth Surface Processes and Landforms published by John Wiley & Sons Ltd.

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Details

Published: Jan 21, 2019
Vol/Issue: 44(5)
Pages: 1148-1162
License: View

Authors

P

Pablo Heredia Barión

Helmholtz Center for Polar and Marine Research, Geosciences Division Alfred Wegener Institute Am Alten Hafen 26 27568 Bremerhaven Germany; Department of Geosciences University of Bremen Klagenfurterstr, 2‐4 28359 Bremen Germany

S

Sebastian Lindhorst

University of Hamburg, Institute for Geology Bundesstr, 55 20146 Hamburg Germany

I

Ilona Schutter

University of Hamburg, Institute for Geology Bundesstr, 55 20146 Hamburg Germany

U

Ulrike Falk

Helmholtz Center for Polar and Marine Research, Geosciences Division Alfred Wegener Institute Am Alten Hafen 26 27568 Bremerhaven Germany

G

Gerhard Kuhn

Helmholtz Center for Polar and Marine Research, Geosciences Division Alfred Wegener Institute Am Alten Hafen 26 27568 Bremerhaven Germany

Funding

Deutsche Forschungsgemeinschaft Award: DFG project Li2005/1‐1 to SL

Alfred Wegener Institute Helmholtz Centre for Polar and Marine Research Award: Paces II‐Polar Regions and Coasts in the changing

Cite This Article

Pablo Heredia Barión, Sebastian Lindhorst, Ilona Schutter, et al. (2019). Reaction of a polar gravel‐spit system to atmospheric warming and glacier retreat as reflected by morphology and internal sediment geometries (South Shetland Islands, Antarctica). Earth Surface Processes and Landforms, 44(5), 1148-1162. https://doi.org/10.1002/esp.4565

Reaction of a polar gravel‐spit system to atmospheric warming and glacier retreat as reflected by morphology and internal sediment geometries (South Shetland Islands, Antarctica)

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