Assessing Mid-pleistocene to Holocene Sea-Ice Extent and Carbonate Compensation Depth Fluctuations in the Japan Sea: A Multiproxy Approach

Das, Manisha; Vats, Nishant; Singh, Raj K.; Mishra, Sibasish; Barik, S. Sova; Divya, R. V.; Sengupta, S.; Ranjan, A.; Pandey, Dhananjai K.

doi:10.1007/978-3-030-40659-2_3

Cited by 5 publications

(17 citation statements)

References 48 publications

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“…Glacial‐interglacial seas level changes additionally controlled the intensity of the KC intensity and the Tsushima warm current into the Japan Sea (Das et al., 2018, 2020; Gallagher et al., 2018; Saavedra‐Pellitero et al., 2019). Spectral analysis of the oxic genus Quinqueloculina (%), suboxic genus Bulimina (%), dysoxic genus Globobulimina (%), and productivity indicator δ 13 C pf additionally reveals a prominent ∼23 kyr cyclicity, likely related to KC‐driven productivity changes in the ECS.…”

Section: Discussionmentioning

confidence: 99%

Linkages Between East China Sea Deep‐Sea Oxygenation and Variability in the East Asian Summer Monsoon and Kuroshio Current Over the Last 400,000 years

Vats

Singh

Das

et al. 2021

Paleoceanog and Paleoclimatol

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The East China Sea (ECS) seasonally receives a high organic input due to the terrestrial organic matter influx, which is controlled by the East Asian Summer Monsoon (EASM), and the increased productivity driven by upwelling of the subsurface Kuroshio Current (KC). Changes in benthic foraminiferal assemblage composition in combination with paleoceanographic proxy data (CaCO3 (%), TOC (%), δ13Cpf, and δ18Obf) are used to reconstruct bottom water oxygenation and organic export flux variability over the last 400 kyr in the ECS. Multivariate analyses of benthic foraminiferal census data identified six biofacies characteristic of varying environmental conditions. These results suggest that enhanced EASM precipitation and KC upwelling directly influenced organic export flux and bottom water oxygen content in the ECS. The ECS bottom water was suboxic during Marine Isotope Stage (MIS) 11 to 8; suboxic to dysoxic between MIS 7 and 6, strongly dysoxic between mid‐MIS 5 and 4, and exhibited high variability between MIS 3 and 1. Spectral analysis of relative abundances of representative genera Quinqueloculina (oxic), Bulimina (suboxic), and Globobulimina (dysoxic) reveals a robust 23 kyr signal, which we attribute to precessionally‐paced changes in surface productivity and bottom water oxygenation related to KC variability over the past 400 kyr.

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Section: Discussionmentioning

confidence: 99%

Linkages Between East China Sea Deep‐Sea Oxygenation and Variability in the East Asian Summer Monsoon and Kuroshio Current Over the Last 400,000 years

Vats

Singh

Das

et al. 2021

Paleoceanog and Paleoclimatol

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“…346) Site U1423 in the Japan Sea is marked by the red filled circle. Red arrows mark surface current directions, and black arrows mark EAWM and Westerly wind directions, following Das et al (2018Das et al ( , 2020. This map has been prepared using Ocean Data View (Schlitzer, 2021).…”

Section: Grain-size Analysismentioning

confidence: 99%

“…Periodic fluctuations in the depositional environment were vigorous during this period. The permanent sea ice condition in the northern Japan Sea (Das et al, 2020) continued between 780 and 450 ka, marked by an increase in sand (%), which may be sand size IRD and decrease in silt (%). The calm environment of deposition is characterized by the peak of clay (%) and low-energy condition EM2, except for a brief period during MIS 14 (Figures S1, 5).…”

Section: After Middle Pleistocene Transitionmentioning

confidence: 99%

“…Multiple proxy records (including Foraminifera, Ostracoda, Ice Rafted Debris [IRD] and Detrital sediments) have been used to assess the palaeoceanographic evolution of the Japan Sea (Das et al, 2018(Das et al, , 2020(Das et al, , 2021Gallagher et al, 2018;Huang et al, 2018;Itaki, 2016;Kitamura et al, 2001;Matsuzaki et al, 2018) during the Pleistocene.…”

Section: Introductionmentioning

confidence: 99%

“…Zhai et al (2020) suggested highfrequency oscillations in palaeoproductivity since $1200 ka despite an increased influx of Asian dust. Das et al (2020Das et al ( , 2021 suggested that the palaeoproductivity in the Japan Sea is not only controlled by the aeolian dust influx but modulated by the glacio-eustatic sea-level changes. The changes in the palaeoproductivity are periodic in nature and are controlled by the Tsushima Warm Current (TWC) intrusion strength in the Japan Sea.…”

Section: Introductionmentioning

confidence: 99%

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Sediment depositional pattern in the northern Japan Sea over the last 1200 ka and its linkages to orbital forcing

et al. 2023

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The semi‐enclosed marginal Japan Sea is sensitive to global changes and responds to orbital‐scale variability. Sediment core samples from Integrated Ocean Drilling Program Site U1423 were processed for detrital grain size and semi‐quantitative mineral analysis to assess the sediment characterization and depositional environment in the Japan Sea over the last 1200 ka. The mean grain data suggest the dominance of the silt size fraction over sand and clay in the whole period, while sand content increases dramatically between 600 and 150 ka. The end‐member energy modelling of grain size data suggests that sediment deposition took place under two energy conditions over the last 1200 ka. The low‐energy conditions observed during the middle Pleistocene transition (MPT) is mainly related to the wind deposition with the sediment characteristics being moderately to poorly sorted and coarse to nearly symmetrical skewed during global cooling and enhanced East Asian Winter Monsoon (EAWM) winds in the northern Japan Sea. Post MPT, periodic fluctuations between higher and lower energy conditions are observed, and the depositional environment is controlled by the EAWM wind, and precipitation intensity, glacio‐eustatic sea‐level changes and sea‐ice volumes. During the period, detrital sediments are poorly sorted and nearly symmetrically skewed, marked by the dominance of quartz, plagioclase and k‐feldspar. The spectral analysis grain size‐related data shows the presence of 228, 41 and 23 kyr orbital paced cycles, which are also observed in the Chinese Loess Plateau's normalized quartz mean grain size. This study is the first report of 228 kyr cycles from the Pleistocene Japan Sea sediments indicate that sediment deposition in the Japan Sea is associated with ~200 kyr eccentricity cycle as in the Chinese Loess Plateau.

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Linkages between East China Sea Deep-sea Oxygenation and the Variability of the East Asian Summer Monsoon and Kuroshio Current over last 400,000 years

Vats

Singh

Das

et al. 2021

Preprint

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The East China Sea (ECS) seasonally receives a high organic input due to the terrestrial organic matter influx, which is controlled by the East Asian Summer Monsoon (EASM), and the increased productivity driven by upwelling of the subsurface Kuroshio Current (KC). Changes in benthic foraminiferal assemblage composition in combination with paleoceanographic proxy data (CaCO3 (%), TOC (%), δ 13 Cpf, and δ 18 Obf) are used to reconstruct bottom water oxygenation and organic export flux variability over the last 400 kyr in the ECS. Multivariate analyses of benthic foraminiferal census data identified six biofacies characteristic of varying environmental conditions. These results suggest that enhanced EASM precipitation and KC upwelling directly influenced organic export flux and bottom water oxygen content in the ECS. The ECS bottom water was suboxic during Marine Isotope Stage (MIS) 11 to 8; suboxic to dysoxic between MIS 7 and 6, strongly dysoxic between mid-MIS 5 and 4, and exhibited high variability between MIS 3 and 1. Spectral analysis of relative abundances of representative genera Quinqueloculina (oxic), Bulimina (suboxic), and Globobulimina (dysoxic) reveals a robust 23 kyr signal, which we attribute to precessionally-paced changes in surface productivity and bottom water oxygenation related to KC variability over the past 400 kyr.

show abstract

Assessing Mid-pleistocene to Holocene Sea-Ice Extent and Carbonate Compensation Depth Fluctuations in the Japan Sea: A Multiproxy Approach

Cited by 5 publications

References 48 publications

Linkages Between East China Sea Deep‐Sea Oxygenation and Variability in the East Asian Summer Monsoon and Kuroshio Current Over the Last 400,000 years

Linkages Between East China Sea Deep‐Sea Oxygenation and Variability in the East Asian Summer Monsoon and Kuroshio Current Over the Last 400,000 years

Sediment depositional pattern in the northern Japan Sea over the last 1200 ka and its linkages to orbital forcing

Linkages between East China Sea Deep-sea Oxygenation and the Variability of the East Asian Summer Monsoon and Kuroshio Current over last 400,000 years

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