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Holocene dynamics in the Bering Strait inflow to the Arctic and the Beaufort Gyre circulation based on sedimentary records from the Chukchi Sea

Cited 25 time in wos
Cited 26 time in scopus
Title
Holocene dynamics in the Bering Strait inflow to the Arctic and the Beaufort Gyre circulation based on sedimentary records from the Chukchi Sea
Other Titles
척치해 퇴적물에서 북극해로 유입되는 베링해 수괴와 보퍼트 환류순화의 홀로세 역학
Authors
M. Yamamoto
K. Shimada
T. Irino
K. Suzuki
D. Kobayash
L.Polyak
Nam, Seung-il
Subject
GeologyMeteorology & Atmospheric Sciences
Keywords
Arctic Circulation SystemBeaufort GyreBering Strait InflowChukchi SeaHolocene
Issue Date
2017
Citation
M. Yamamoto, et al. 2017. "Holocene dynamics in the Bering Strait inflow to the Arctic and the Beaufort Gyre circulation based on sedimentary records from the Chukchi Sea". CLIMATE OF THE PAST, 13(0): 1111-1127.
Abstract
ABSTRACT The Beaufort Gyre (BG) and the Bering Strait inflow (BSI) are important elements of the Arctic Ocean circulation system and major controls on the distribution of Arctic sea ice. We report records of the quartz/feldspar and chlorite/illite ratios in three sediment cores from the northern Chukchi Sea providing insights into the long-term dynamics of the BG circulation and the BSI during the Holocene. The quartz/feldspar ratio, a proxy of the BG strength, gradually decreased during the Holocene, suggesting a long-term decline in the BG strength, consistent with orbitally-controlled decrease in summer insolation. We suppose that the BG rotation weakened as a result of increasing stability of sea-ice cover at the margins of the Canada Basin, driven by decreasing insolation. Millennial to multi-centennial variability in the quartz/feldspar ratio (the BG circulation) is consistent with fluctuations in solar irradiance, suggesting that solar activity affected the BG strength on these timescales. The BSI approximated by the chlorite/illite record shows intensified flow from the Bering Sea to the Arctic during the middle Holocene, which is attributed primarily to the effect of an overall weaker Aleutian Low. The middle Holocene intensification of the BSI was associated with decrease in sea-ice concentrations and increase in marine production, as indicated by biomarker concentrations, suggesting an influence of the BSI on sea-ice distribution and biological production in the Chukchi Sea.
URI
https://repository.kopri.re.kr/handle/201206/5564
DOI
http://dx.doi.org/10.5194/cp-13-1111-2017
Type
Article
Indexed
SCIE
Appears in Collections  
2014-2016, Characteristics of gas hydrate and reconstruction of paleo-environment changes in the western Arctic (14-16) / Nam, Seung-Il (PE14062; PE15062; PE16062)
2015-2018, Changes in environments and coastal geomorphology of Svalbard fjords, Arctic (15-18) / Nam, Seung-il (PN15090; PN16090; PN17090)
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