Post-glacial flooding of the Bering Land Bridge dated to 11 cal ka BP based on new geophysical and sediment records
The Bering Strait connects the Arctic and Pacific oceans and separates the North American and Asian landmasses. The presently shallow ( ∼ 53 m) strait was exposed during the sea level lowstand of the last glacial period, which permitted human migration across a land bridge today referred to as the B...
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Copernicus Publications
2017
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ftdoajarticles:oai:doaj.org/article:d93fe953304641738cd233709db598b3 2023-05-15T14:51:59+02:00 Post-glacial flooding of the Bering Land Bridge dated to 11 cal ka BP based on new geophysical and sediment records M. Jakobsson C. Pearce T. M. Cronin J. Backman L. G. Anderson N. Barrientos G. Björk H. Coxall A. de Boer L. A. Mayer C.-M. Mörth J. Nilsson J. E. Rattray C. Stranne I. Semiletov M. O'Regan 2017-08-01T00:00:00Z https://doi.org/10.5194/cp-13-991-2017 https://doaj.org/article/d93fe953304641738cd233709db598b3 EN eng Copernicus Publications https://www.clim-past.net/13/991/2017/cp-13-991-2017.pdf https://doaj.org/toc/1814-9324 https://doaj.org/toc/1814-9332 doi:10.5194/cp-13-991-2017 1814-9324 1814-9332 https://doaj.org/article/d93fe953304641738cd233709db598b3 Climate of the Past, Vol 13, Pp 991-1005 (2017) Environmental pollution TD172-193.5 Environmental protection TD169-171.8 Environmental sciences GE1-350 article 2017 ftdoajarticles https://doi.org/10.5194/cp-13-991-2017 2022-12-31T15:24:39Z The Bering Strait connects the Arctic and Pacific oceans and separates the North American and Asian landmasses. The presently shallow ( ∼ 53 m) strait was exposed during the sea level lowstand of the last glacial period, which permitted human migration across a land bridge today referred to as the Bering Land Bridge. Proxy studies (stable isotope composition of foraminifera, whale migration into the Arctic Ocean, mollusc and insect fossils and paleobotanical data) have suggested a range of ages for the Bering Strait reopening, mainly falling within the Younger Dryas stadial (12.9–11.7 cal ka BP). Here we provide new information on the deglacial and post-glacial evolution of the Arctic–Pacific connection through the Bering Strait based on analyses of geological and geophysical data from Herald Canyon, located north of the Bering Strait on the Chukchi Sea shelf region in the western Arctic Ocean. Our results suggest an initial opening at about 11 cal ka BP in the earliest Holocene, which is later than in several previous studies. Our key evidence is based on a well-dated core from Herald Canyon, in which a shift from a near-shore environment to a Pacific-influenced open marine setting at around 11 cal ka BP is observed. The shift corresponds to meltwater pulse 1b (MWP1b) and is interpreted to signify relatively rapid breaching of the Bering Strait and the submergence of the large Bering Land Bridge. Although the precise rates of sea level rise cannot be quantified, our new results suggest that the late deglacial sea level rise was rapid and occurred after the end of the Younger Dryas stadial. Article in Journal/Newspaper Arctic Arctic Ocean Bering Land Bridge Bering Strait Chukchi Chukchi Sea Foraminifera* Directory of Open Access Journals: DOAJ Articles Arctic Arctic Ocean Bering Strait Chukchi Sea Pacific Climate of the Past 13 8 991 1005 |
institution |
Open Polar |
collection |
Directory of Open Access Journals: DOAJ Articles |
op_collection_id |
ftdoajarticles |
language |
English |
topic |
Environmental pollution TD172-193.5 Environmental protection TD169-171.8 Environmental sciences GE1-350 |
spellingShingle |
Environmental pollution TD172-193.5 Environmental protection TD169-171.8 Environmental sciences GE1-350 M. Jakobsson C. Pearce T. M. Cronin J. Backman L. G. Anderson N. Barrientos G. Björk H. Coxall A. de Boer L. A. Mayer C.-M. Mörth J. Nilsson J. E. Rattray C. Stranne I. Semiletov M. O'Regan Post-glacial flooding of the Bering Land Bridge dated to 11 cal ka BP based on new geophysical and sediment records |
topic_facet |
Environmental pollution TD172-193.5 Environmental protection TD169-171.8 Environmental sciences GE1-350 |
description |
The Bering Strait connects the Arctic and Pacific oceans and separates the North American and Asian landmasses. The presently shallow ( ∼ 53 m) strait was exposed during the sea level lowstand of the last glacial period, which permitted human migration across a land bridge today referred to as the Bering Land Bridge. Proxy studies (stable isotope composition of foraminifera, whale migration into the Arctic Ocean, mollusc and insect fossils and paleobotanical data) have suggested a range of ages for the Bering Strait reopening, mainly falling within the Younger Dryas stadial (12.9–11.7 cal ka BP). Here we provide new information on the deglacial and post-glacial evolution of the Arctic–Pacific connection through the Bering Strait based on analyses of geological and geophysical data from Herald Canyon, located north of the Bering Strait on the Chukchi Sea shelf region in the western Arctic Ocean. Our results suggest an initial opening at about 11 cal ka BP in the earliest Holocene, which is later than in several previous studies. Our key evidence is based on a well-dated core from Herald Canyon, in which a shift from a near-shore environment to a Pacific-influenced open marine setting at around 11 cal ka BP is observed. The shift corresponds to meltwater pulse 1b (MWP1b) and is interpreted to signify relatively rapid breaching of the Bering Strait and the submergence of the large Bering Land Bridge. Although the precise rates of sea level rise cannot be quantified, our new results suggest that the late deglacial sea level rise was rapid and occurred after the end of the Younger Dryas stadial. |
format |
Article in Journal/Newspaper |
author |
M. Jakobsson C. Pearce T. M. Cronin J. Backman L. G. Anderson N. Barrientos G. Björk H. Coxall A. de Boer L. A. Mayer C.-M. Mörth J. Nilsson J. E. Rattray C. Stranne I. Semiletov M. O'Regan |
author_facet |
M. Jakobsson C. Pearce T. M. Cronin J. Backman L. G. Anderson N. Barrientos G. Björk H. Coxall A. de Boer L. A. Mayer C.-M. Mörth J. Nilsson J. E. Rattray C. Stranne I. Semiletov M. O'Regan |
author_sort |
M. Jakobsson |
title |
Post-glacial flooding of the Bering Land Bridge dated to 11 cal ka BP based on new geophysical and sediment records |
title_short |
Post-glacial flooding of the Bering Land Bridge dated to 11 cal ka BP based on new geophysical and sediment records |
title_full |
Post-glacial flooding of the Bering Land Bridge dated to 11 cal ka BP based on new geophysical and sediment records |
title_fullStr |
Post-glacial flooding of the Bering Land Bridge dated to 11 cal ka BP based on new geophysical and sediment records |
title_full_unstemmed |
Post-glacial flooding of the Bering Land Bridge dated to 11 cal ka BP based on new geophysical and sediment records |
title_sort |
post-glacial flooding of the bering land bridge dated to 11 cal ka bp based on new geophysical and sediment records |
publisher |
Copernicus Publications |
publishDate |
2017 |
url |
https://doi.org/10.5194/cp-13-991-2017 https://doaj.org/article/d93fe953304641738cd233709db598b3 |
geographic |
Arctic Arctic Ocean Bering Strait Chukchi Sea Pacific |
geographic_facet |
Arctic Arctic Ocean Bering Strait Chukchi Sea Pacific |
genre |
Arctic Arctic Ocean Bering Land Bridge Bering Strait Chukchi Chukchi Sea Foraminifera* |
genre_facet |
Arctic Arctic Ocean Bering Land Bridge Bering Strait Chukchi Chukchi Sea Foraminifera* |
op_source |
Climate of the Past, Vol 13, Pp 991-1005 (2017) |
op_relation |
https://www.clim-past.net/13/991/2017/cp-13-991-2017.pdf https://doaj.org/toc/1814-9324 https://doaj.org/toc/1814-9332 doi:10.5194/cp-13-991-2017 1814-9324 1814-9332 https://doaj.org/article/d93fe953304641738cd233709db598b3 |
op_doi |
https://doi.org/10.5194/cp-13-991-2017 |
container_title |
Climate of the Past |
container_volume |
13 |
container_issue |
8 |
container_start_page |
991 |
op_container_end_page |
1005 |
_version_ |
1766323123059163136 |