Review of Changes in Deep Water Ventilation and Oxygenation During Glacial-Interglacial Period (~350 Kyr) in the Bering Sea, Subarctic North Pacific: Perceptions From Benthic Foraminifera

2015 ◽  
Vol 4 (10) ◽  
pp. 9837-9856
Author(s):  
Adeyinka Oluyemi Aturamu, Sev Kender
Keyword(s):  
Deep Water ◽  
Bering Sea ◽  
Benthic Foraminifera ◽  
North Pacific ◽  
Interglacial Period ◽  
Subarctic North Pacific ◽  
The Bering Sea

scholarly journals Intermediate- and Deep-Water Oxygenation History in the Subarctic North Pacific During the Last Deglacial Period

2021 ◽  
Vol 9 ◽  
Author(s):  
Ekaterina Ovsepyan ◽  
Elena Ivanova ◽  
Martin Tetard ◽  
Lars Max ◽  
Ralf Tiedemann
Keyword(s):  
Sea Level ◽  
Deep Water ◽  
Bering Sea ◽  
North Pacific ◽  
Intermediate Water ◽  
Western Bering Sea ◽  
Water Oxygen ◽  
Wide Range ◽  
The Bering Sea ◽  
Oxygen Concentrations

Deglacial dissolved oxygen concentrations were semiquantitatively estimated for intermediate and deep waters in the western Bering Sea using the benthic foraminiferal-based transfer function developed by Tetard et al. (2017), Tetard et al. (2021a). Benthic foraminiferal assemblages were analyzed from two sediment cores, SO201-2-85KL (963 m below sea level (mbsl), the intermediate-water core) and SO201-2-77KL (2,163 mbsl, the deep-water core), collected from the Shirshov Ridge in the western Bering Sea. Intermediate waters were characterized by an oxygen content of ∼2.0 ml L−1 or more during the Last Glacial Maximum (LGM)–Heinrich 1 (H1), around 0.15 ml L−1 during the middle Bølling/Allerød (B/A)–Early Holocene (EH), and a slight increase in [O2] (∼0.20 ml L−1) at the beginning of the Younger Dryas (YD) mbsl. Deep-water oxygen concentrations ranged from 0.9 to 2.5 ml L−1 during the LGM–H1, hovered around 0.08 ml L−1 at the onset of B/A, and were within the 0.30–0.85 ml L−1 range from the middle B/A to the first half of YD and the 1.0–1.7 ml L−1 range from the middle to late Holocene. The [O2] variations remind the δ18O NGRIP record thereby providing evidence for a link between the Bering Sea oxygenation at intermediate depths and the deglacial North Atlantic climate. Changes in the deep-water oxygen concentrations mostly resemble the deglacial dynamics of the Southern Ocean upwelling intensity which is supposed to be closely coupled with the Antarctic climate variability. This coherence suggests that deglacial deep-water [O2] variations were primarily controlled by changes in the circulation of southern-sourced waters. Nevertheless, the signal from the south at the deeper site might be amplified by the Northern Hemisphere climate warming via an increase in sea-surface bioproductivity during the B/A and EH. A semi-enclosed position of the Bering Sea and sea-level oscillations might significantly contribute to the magnitude of oxygenation changes in the study area during the last deglaciation. Interregional correlation of different proxy data from a wide range of water depths indicates that deglacial oxygenation changes were more pronounced in the Bering and Okhotsk marginal seas than along the open-ocean continental margin and abyssal settings of the North Pacific.

scholarly journals Water column iron dynamics in the subarctic North Pacific Ocean and the Bering Sea

2013 ◽  
Vol 118 (3) ◽  
pp. 1257-1271 ◽  
Author(s):  
Ren Uchida ◽  
Kenshi Kuma ◽  
Aya Omata ◽  
Satoko Ishikawa ◽  
Nanako Hioki ◽  
...  
Keyword(s):  
Pacific Ocean ◽  
Water Column ◽  
Bering Sea ◽  
North Pacific ◽  
North Pacific Ocean ◽  
Subarctic North Pacific ◽  
The Bering Sea

Arctic archaeologies: recent work on Beringia

Antiquity ◽  
2015 ◽  
Vol 89 (345) ◽  
pp. 740-742 ◽  
Author(s):  
Herbert Maschner
Keyword(s):  
Bering Sea ◽  
North Pacific ◽  
Yukon Territory ◽  
The Arctic ◽  
Land Bridge ◽  
Far North ◽  
North East ◽  
Bering Land Bridge ◽  
Last Glaciation ◽  
The Bering Sea

This review considers three books on the archaeology of territories situated around the Bering Sea—a region often referred to as Beringia, adopting the term created for the Late Pleistocene landscape that extended from north-east Asia, across the Bering Land Bridge, to approximately the Yukon Territory of Canada. This region is critical to the archaeology of the Arctic for two fundamental reasons. First, it is the gateway to the Americas, and was certainly the route by which the territory was colonised at the end of the last glaciation. Second, it is the place where the entire Aleut-Eskimo (Unangan, Yupik, Alutiiq, Inupiat and Inuit) phenomenon began, and every coastal culture from the far north Pacific, to Chukotka, to north Alaska, and to arctic Canada and Greenland, has its foundation in the cultural developments that occurred around the Bering Sea.

Nonrandom distribution of chum salmon stocks in the Bering Sea and the North Pacific Ocean estimated using mitochondrial DNA microarray

2009 ◽  
Vol 75 (2) ◽  
pp. 359-367 ◽  
Author(s):  
Shogo Moriya ◽  
Shunpei Sato ◽  
Moongeun Yoon ◽  
Tomonori Azumaya ◽  
Shigehiko Urawa ◽  
...  
Keyword(s):  
Mitochondrial Dna ◽  
Dna Microarray ◽  
Bering Sea ◽  
North Pacific ◽  
Chum Salmon ◽  
North Pacific Ocean ◽  
The North ◽  
Nonrandom Distribution ◽  
The North Pacific ◽  
The Bering Sea

Single-nucleotide polymorphisms reveal distribution and migration of Chinook salmon (Oncorhynchus tshawytscha) in the Bering Sea and North Pacific Ocean

2013 ◽  
Vol 70 (1) ◽  
pp. 128-141 ◽  
Author(s):  
Wesley A. Larson ◽  
Fred M. Utter ◽  
Katherine W. Myers ◽  
William D. Templin ◽  
James E. Seeb ◽  
...  
Keyword(s):  
Pacific Ocean ◽  
Chinook Salmon ◽  
Bering Sea ◽  
North Pacific ◽  
Oncorhynchus Tshawytscha ◽  
North Pacific Ocean ◽  
Nucleotide Polymorphisms ◽  
Single Nucleotide ◽  
And Migration ◽  
The Bering Sea

We genotyped Chinook salmon (Oncorhynchus tshawytscha) from the Bering Sea and North Pacific Ocean for 43 single-nucleotide polymorphisms (SNPs) to investigate seasonal distribution and migration patterns. We analyzed 3563 immature fish from 22 spatiotemporal strata; composition analyses were performed using genotype data from spawning stocks spanning the species range. Substantial variation in stock composition existed among spatial and seasonal strata. We inferred patterns of seasonal migration based upon these data along with data from previous tag, scale, and parasite studies. We found that stocks from western Alaska and Yukon River overwinter on the Alaska continental shelf then travel to the middle and western Bering Sea during spring–fall. Stocks from California to Southeast Alaska were distributed in Gulf of Alaska year-round, with a substantial portion of this group migrating northward to the eastern Bering Sea during spring–fall. Proportions of Russian stocks increase when moving east to west in both the Bering Sea and North Pacific Ocean. These data can be used to better understand the impacts of fisheries and climate change on this valuable resource.

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