Deglaciation dynamics of the Fennoscandian Ice Sheet in the Kattegat, the gateway between the North Sea and the Baltic Sea Basin
| Autor: | Ole Bennike, Bryan C Lougheed, Daria Ryabchuk, Helena L. Filipsson, Thomas Andrén, Stephen P Obrochta, Jørn Bo Jensen, Emilio Herrero-Bervera, Ian Snowball, Aarno Kotilainen, Sandra Passchier, Nadina Quintana Krupinski, Lukas Wacker, Outi Hyttinen |
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| Přispěvatelé: | Laboratoire des Sciences du Climat et de l'Environnement [Gif-sur-Yvette] (LSCE), Institut national des sciences de l'Univers (INSU - CNRS)-Université Paris-Saclay-Centre National de la Recherche Scientifique (CNRS)-Commissariat à l'énergie atomique et aux énergies alternatives (CEA)-Université de Versailles Saint-Quentin-en-Yvelines (UVSQ), Université de Versailles Saint-Quentin-en-Yvelines (UVSQ)-Commissariat à l'énergie atomique et aux énergies alternatives (CEA)-Institut national des sciences de l'Univers (INSU - CNRS)-Université Paris-Saclay-Centre National de la Recherche Scientifique (CNRS) |
| Rok vydání: | 2020 |
| Předmět: |
[SDU.OCEAN]Sciences of the Universe [physics]/Ocean
Atmosphere 010506 paleontology Archeology geography geography.geographical_feature_category 010504 meteorology & atmospheric sciences Pleistocene Continental shelf Geology 01 natural sciences Sedimentary depositional environment Paleontology 13. Climate action Deglaciation Sedimentary rock 14. Life underwater Glacial period Ice sheet [SDU.ENVI]Sciences of the Universe [physics]/Continental interfaces environment ComputingMilieux_MISCELLANEOUS Ecology Evolution Behavior and Systematics Sea level 0105 earth and related environmental sciences |
| Zdroj: | Boreas Boreas, Wiley, 2021, ⟨10.1111/bor.12494⟩ Boreas, 2021, ⟨10.1111/bor.12494⟩ |
| ISSN: | 1502-3885 0300-9483 |
| Popis: | This paper presents an age–depth model based on an ultra-high-resolution, 80-m-thick sedimentary succession from a marine continental shelf basin, the Kattegat. This is an area of dynamic deglaciation of the Fennoscandian Ice Sheet during the Late Pleistocene. The Kattegat is also a transitional area between the saline North Sea and the brackish Baltic Sea. As such, it records general development of currents and exchange between these two systems. Data for the succession were provided through the Integrated Ocean Drilling Program Site M0060. The site indicates onset of deglaciation at c. 18 ka BP and relatively continuous sedimentation until 13 ka BP. At this point, sediments record a hiatus until c. 9–7 ka BP. The uppermost sedimentary unit contains redeposited material, but it is estimated to represent only the last c. 9–7 ka BP. The age–depth model is based on 17 select, radiocarbon-dated samples and is integrated with a set of physical and chemical proxies. The integrated records provide novel constraints on the timing of major palaeoenvironmental changes, such as the transition from glaciomarine proximal to glaciomarine distal and marine conditions, and their connections to known major events and processes in the region and the North Atlantic. Depositional evidence specifically documents connections between the Fennoscandian Ice Sheet behaviour and atmospheric and oceanic warming. Glacial retreat may have also depended on topographic factors such as changes in basin width and depth, linked to relative sea level changes and land uplift. The results indicate an early response of the Fennoscandian Ice Sheet to changing climate, and the ice sheet's possible influence on oceanic circulation during the Late Pleistocene deglaciation. (Less) |
| Databáze: | OpenAIRE |
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