The Holocene Pulleniatina Minimum Event revisited: Geochemical and faunal evidence from the Okinawa Trough and upper reaches of the Kuroshio current

Lin, Yu-Ju; Wei, Kuo-Yen; Lin, In Tian; Yu, Pai‐Sen; Chiang, Hong‐Wei; Chen, Chen Yin; Shen, Chuan Chou; Mii, Horng‐Sheng; Chen, Yue‐Gau

doi:10.1016/j.marmicro.2006.02.003

Cited by 62 publications

(75 citation statements)

References 74 publications

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“…It originates from the westward-flowing north equatorial current in the western Pacific [28] and transports warm, saline, generally oligotrophic (especially nitrogen deficient) seawater and enormous amounts of mass (e.g., geochemical materials) and energy (e.g., heat) from the low-to midlatitude regions (e.g., [29,30]). The current flows east of Taiwan and northwards along the Okinawa Trough (e.g., [31]), with a maximum speed of 1 m/s and a width of 100 km [32]. Seawater transported by the Kuroshio current flows from 19 to 47 Sv (Sverdrup, 1 Sv = 10 6 m 3 /s) in the East China Sea [28,[33][34][35] and is an important source of heat for the atmosphere in the global heat balance [36].…”

Section: Introductionmentioning

confidence: 99%

Understanding the Compositional Variability of the Major Components of Hydrothermal Plumes in the Okinawa Trough

et al. 2018

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Studies of the major components of hydrothermal plumes in seafloor hydrothermal fields are critical for an improved understanding of biogeochemical cycles and the large-scale distribution of elements in the submarine environment. The composition of major components in hydrothermal plume water column samples from 25 stations has been investigated in the middle and southern Okinawa Trough. The physical and chemical properties of hydrothermal plume water in the Okinawa Trough have been affected by input of the Kuroshio current, and its influence on hydrothermal plume water from the southern Okinawa Trough to the middle Okinawa Trough is reduced. The anomalous layers of seawater in the hydrothermal plume water columns have higher K + , Ca 2+ , Mn 2+ , B 3+ , Ca 2+ /SO 4 2− , and Mn 2+ /Mg 2+ ratios and higher optical anomalies than other layers. The Mg 2+ , SO 4 2− , Mg 2+ /Ca 2+ , and SO 4 2− /Mn 2+ ratios of the anomalous layers are lower than other layers in the hydrothermal plume water columns and are consistent with concentrations in hydrothermal vent fluids in the Okinawa Trough. This suggests that the chemical variations of hydrothermal plumes in the Tangyin hydrothermal field, like other hydrothermal fields, result in the discharge of high K + , Ca 2+ , and B 3+ and low Mg 2+ and SO 4 2− fluid. Furthermore, element ratios (e.g., Sr 2+ /Ca 2+ , Ca 2+ /Cl − ) in hydrothermal plume water columns were found to be similar to those in average seawater, indicating that Sr 2+ /Ca 2+ and Ca 2+ /Cl − ratios of hydrothermal plumes might be useful proxies for chemical properties of seawater. The hydrothermal K + , Ca 2+ , Mn 2+ , and B 3+ flux to seawater in the Okinawa Trough is about 2.62-873, 1.04-326, 1.30-76.4, and 0.293-34.7 × 10 6 kg per year, respectively. The heat flux is about 0.159-1,973 × 10 5 W, which means that roughly 0.0006% of ocean heat is supplied by seafloor hydrothermal plumes in the Okinawa Trough.

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Section: Introductionmentioning

confidence: 99%

Understanding the Compositional Variability of the Major Components of Hydrothermal Plumes in the Okinawa Trough

et al. 2018

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“…Other ECS sediment core studies (Jian et al 1996(Jian et al , 2000bLi et al 1997) also have proposed the same scenario -that the Kuroshio was weak and/or shifted toward the Pacific during the PME in~2 to 5 kya of the late Holocene. But a reconstructed Mg/Ca SST record had shown that the SST did not have a declining trend during this period (Lin et al 2006), and the author concluded that PME might have resulted from a decrease or migrating of the Kuroshio. All evidence from previous works has suggested short-term, millennial-scale variability in surface hydrography in the ECS during the late Quaternary.…”

Section: Introductionmentioning

confidence: 99%

Millennial-Scale Planktic Foraminifer Faunal Variability in the East China Sea during the Past 40000 Years (IMAGES MD012404 from the Okinawa Trough)

Chang¹,

Wang²,

Yokoyama³

et al. 2008

Terr. Atmos. Ocean. Sci.

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High resolution planktic foraminifer fauna assemblage data are used to reconstruct the millennial-scale sea surface temperature (SST) variability of the past 40000 years at an IMAGES core site (MD012404) in the Okinawa Trough in the East China Sea (ECS). The fauna assemblages in core MD012404 are dominated by five species -Globigerinoides ruber, Globigerina bulloides, Neogloboquadrina dutertrei, Pulleniatina obliquiloculata, and Globigerinita glutinata, which account for > 70% in relative abundance. Our Q-mode factor analysis decomposed the fauna abundance data into three factors, which indicate cold water mass, warm water mass, and possibly coastal water flow with low salinity in the ECS. The MD012404 fauna data show abrupt changes at~16 kya, suggesting a return to a warmer climate or warm water intrusion of the Kuroshio into the Okinawa Trough since the Last Glacial Maximum (LGM). SST estimates based on the fauna assemblages of planktic foraminifers indicate a LGM cooling of 1 -2°C. A maximum cooling by 3 -4°C is observed in episodic, millennial-scale events in the glacial stages of the record. The SST record displays variability that closely tracks the structure of oxygen isotopes of stalagmites from Hulu Cave and ice cores from GISP 2 Dansgaard/Oeschger cycles and Heinrich events. Low salinity in the ECS is inferred based on MD012404 fauna SST and planktic foraminifer oxygen isotope records for the cold millennial-scale intervals, pointing to the Intertropical Convergence Zone (ITCZ) and/or East Asian monsoon as important factors driving SST and salinity in the subtropical western Pacific, both on orbital and suborbital time scales.

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“…Sun et al (2005), Lin et al (2006), and Kubota et al (2010) reported no changes in sea-surface temperatures or sea-surface salinities in the East China Sea during the past 7000 years. Jian et al (2000) proposed that a decrease in temperatures during the period 4600-2700 cal.…”

Section: Discussionmentioning

confidence: 94%

“…18 O sw records from cores A7 (Sun et al, 2005), MD403 (Lin et al, 2006), and KY07-04-01 (Kubota et al, 2010) and stalagmite d…”

Section: Discussionmentioning

confidence: 99%

“…Many studies have examined Holocene oceanographic changes in the East China Sea, based on geochemical analyses of the planktonic foraminifera Globigerinoides ruber, which remains at water depths of 2 to 50 m during its life cycle (e.g., Fairbanks et al, 1982;Hemleben et al, 1989;Lin et al, 2004) and were recovered from deep-sea sedimentary cores (Jian et al, 2000;Ijiri et al, 2005;Sun et al, 2005;Lin et al, 2006;Kubota et al, 2010). Sun et al (2005), Lin et al (2006), and Kubota et al (2010) reported no changes in sea-surface temperatures or sea-surface salinities in the East China Sea during the past 7000 years.…”

Section: Discussionmentioning

confidence: 99%

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Possible Cavern-Forming Activity at Millennial Time Scales and its Impact on Variations in Submarine Cave Environments and Habitat Availability, Okinawa, Japan

Kitamura¹,

Tamaki²,

Miyairi³

et al. 2014

JCKS

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We examined the spatial distributions and 14 C ages of sessile marine organisms in the submarine cave Ginama at Okinawa, Japan. The cave is the northernmost and only known submarine cave with an air chamber in the northwestern Pacific region. The upper limit of living individuals of the coralline sponges Acanthocaetetes wellsi and the bivalve Pycnodonte taniguchii in the cave is located at a depth of approximately 10 m relative to the surface of the pool in the cave. Low temperatures and low salinities prevent these organisms from colonizing water depths shallower than 10 m. On the other hand, the upper limit of fossil individuals, dated between 5117 and 387 cal yr BP, is at a depth of 2.5 m, implying that at present the influence of fresh water on the cave pool is stronger than it has been at other times in the past 5000 years. This increase in the flux of fresh water may be explained by continuous cavern-forming activities such as dissolution.

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The Holocene Pulleniatina Minimum Event revisited: Geochemical and faunal evidence from the Okinawa Trough and upper reaches of the Kuroshio current

Cited by 62 publications

References 74 publications

Understanding the Compositional Variability of the Major Components of Hydrothermal Plumes in the Okinawa Trough

Understanding the Compositional Variability of the Major Components of Hydrothermal Plumes in the Okinawa Trough

Millennial-Scale Planktic Foraminifer Faunal Variability in the East China Sea during the Past 40000 Years (IMAGES MD012404 from the Okinawa Trough)

Possible Cavern-Forming Activity at Millennial Time Scales and its Impact on Variations in Submarine Cave Environments and Habitat Availability, Okinawa, Japan

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