Post-glacial flooding of the Bering Land Bridge dated to 11 cal ka BP based on new geophysical and sediment records; Climate of the Past; Vol. 13, iss. 8

Post-glacial flooding of the Bering Land Bridge dated to 11 cal ka BP based on new geophysical and sediment records; Climate of the Past; Vol. 13, iss. 8

Detaylı Bibliyografya
Parent link:Climate of the Past: international scientific journal
Vol. 13, iss. 8.— 2017.— [P. 991-1005]
Müşterek Yazar: Национальный исследовательский Томский политехнический университет (ТПУ) Институт природных ресурсов (ИПР) Кафедра геологии и разведки полезных ископаемых (ГРПИ)
Diğer Yazarlar: Jakobsson M. Martin, Cronin T. M. Thomas M., Backman J. Jan, Anderson L. G. Leif G., Barrientos N. Natalia, Bjork G. Goran, Coxall H. Helen, De Boer A. Agatha, Mayer L. Larry, Morth C.-M. Carl- Magnus, Nilsson J. Johan, Rattray J. E. Jayne E., Stranne C. Christian, Semiletov I. P. Igor Petrovich
Özet:Title screen
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.
Dil:İngilizce
Baskı/Yayın Bilgisi: 2017
Konular:
электронный ресурс
труды учёных ТПУ
Берингов пролив
ледниковый период
Арктика
Тихий океан
шельфы
Online Erişim:https://doi.org/10.5194/cp-13-991-2017
Materyal Türü: Elektronik Kitap Bölümü
KOHA link:https://koha.lib.tpu.ru/cgi-bin/koha/opac-detail.pl?biblionumber=656186

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