Origin of deep water in the Japan Sea over the last 145kyr

Minoura, Koji; Akaki, K.; Nemoto, Naoki; Tsukawaki, Shinji; Nakamura, Toshio

doi:10.1016/j.palaeo.2012.04.011

Cited by 16 publications

(15 citation statements)

References 37 publications

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“…Two pre-MBE extirpation events corresponding to the glacial maxima during MISs 12 and 16 are much longer than the post-MBE extirpation events corresponding to the glacial maxima during MISs 2, 6, and 10 ( Figure 2). In the Sea of Japan, substantial isolation of the sea and resulting basin-wide bottom oxygen depletion occurred when the sea level dropped more than 90 m Minoura et al, 2012). In the Sea of Japan, substantial isolation of the sea and resulting basin-wide bottom oxygen depletion occurred when the sea level dropped more than 90 m Minoura et al, 2012).…”

Section: Major Extirpation Eventsmentioning

confidence: 99%

“…Each extirpation event corresponds to large-scale sea level reduction during glacial maxima and the basinwide deposition of thick dark layers in the Sea of Japan (Figure 2). Due to the cease of convection and formation of stratification, euxinic conditions at greater water depths (>900 m) formed the dark layers, while deoxygenation occurred at intermediate water depths Minoura et al, 2012;Watanabe et al, 2007). Due to the cease of convection and formation of stratification, euxinic conditions at greater water depths (>900 m) formed the dark layers, while deoxygenation occurred at intermediate water depths Minoura et al, 2012;Watanabe et al, 2007).…”

Section: Major Extirpation Eventsmentioning

confidence: 99%

“…A 150-200 m layer of Tsushima Warm Surface Current (TWC) and the underneath homogenous Japan Sea Proper Water forms a unique circulation system in the Sea of Japan (Talley et al, 2006). The Japan Sea Proper Water mainly originates from the TWC that cools and sinks down in the northern Sea of Japan (e.g., Ikehara & Itaki, 2007;Minoura et al, 2012;Talley et al, 2006). The Japan Sea Proper Water mainly originates from the TWC that cools and sinks down in the northern Sea of Japan (e.g., Ikehara & Itaki, 2007;Minoura et al, 2012;Talley et al, 2006).…”

Section: Introductionmentioning

confidence: 99%

“…The TWC, a mixture of the Kuroshio Current and the East China Sea Coastal Water, is the only major saline water influx to the marginal sea (Gallagher et al, 2015;Talley et al, 2006). The Japan Sea Proper Water mainly originates from the TWC that cools and sinks down in the northern Sea of Japan (e.g., Ikehara & Itaki, 2007;Minoura et al, 2012;Talley et al, 2006). This deepwater formation provides an exceptionally oxygen-rich water to sustain the deep-sea ecosystem (dissolved oxygen concentration of 220-250 μmol/kg; Talley et al, 2006;Minoura et al, 2012).…”

Section: Introductionmentioning

confidence: 99%

“…The Japan Sea Proper Water mainly originates from the TWC that cools and sinks down in the northern Sea of Japan (e.g., Ikehara & Itaki, 2007;Minoura et al, 2012;Talley et al, 2006). This deepwater formation provides an exceptionally oxygen-rich water to sustain the deep-sea ecosystem (dissolved oxygen concentration of 220-250 μmol/kg; Talley et al, 2006;Minoura et al, 2012). However, the Sea of Japan (sill depth 130 m) was at most completely isolated during low sea level stands (maximum À130 m).…”

Section: Introductionmentioning

confidence: 99%

See 4 more Smart Citations

Benthic Biotic Response to Climate Changes Over the Last 700,000 Years in a Deep Marginal Sea: Impacts of Deoxygenation and the Mid‐Brunhes Event

Huang

Yasuhara

Iwatani

et al. 2018

Paleoceanog and Paleoclimatol

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The Sea of Japan is a marginal sea, connecting to adjacent seas by four shallow straits (water depths <130 m). Marginal seas are ideal for studying biotic responses to large‐scale environmental changes as they often are sensitive to glacial‐interglacial and stadial‐interstadial climatic cycles. However, only a limited number of studies cover time periods beyond the last two glacial‐interglacial cycles. Here we present a 700,000‐year record of benthic biotic response to paleoceanographic changes in the southern Sea of Japan, covering the past seven glacial‐interglacial cycles, based on ostracode assemblages at the Integrated Ocean Drilling Program (IODP) Site U1427. The results indicate that long‐term oxygen variability in the bottom water has been the major control impacting the marginal‐sea biota. Five local extirpation events were recognized as barren zones during glacial maxima immediately before terminations I, II, IV, V, and VII, which are probably caused by bottom‐water deoxygenation. Results of multivariate analyses indicated clear faunal cyclicity influenced by glacial‐interglacial oxygen variability with a succession from opportunistic species dominance through tolerant infauna dominance to barren zone during the deoxygenation processes and the opposite succession during the recovery processes. The Sea of Japan ostracode faunal composition showed distinct difference between the post‐MBE and pre‐MBE (Mid‐Brunhes Event) periods, indicating the MBE as a major disturbance event in marginal‐sea ecosystems. The MBE shortened the duration of the extirpation events, fostered dominance of warmer‐water species, and amplified the glacial‐interglacial faunal cyclicity. Our long‐term biotic response study clearly indicates that deep marginal sea ecosystems are dynamic and vulnerable to climate changes.

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Section: Major Extirpation Eventsmentioning

confidence: 99%