Paleoenvironmental changes in the northern area of the East China Sea during the past 42,000 years

Ijiri, Akira; Wang, Luejiang; Oba, Tadamichi; Kawahata, Hodaka; Huang, C. C.; Huang, Chih-Chung

doi:10.1016/j.palaeo.2004.12.028

Cited by 187 publications

(224 citation statements)

References 45 publications

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“…6a). Such trends were also observed in previous results from cores MD982195 (Ijiri et al, 2005) and core A7 (Sun et al, 2005) in the northern and middle OT, ODP184-1144 Table 3. Average SST and SSS from proxies of different periods for core CSH1 and from instrumental records in the study area around 28-29 • N, 131-132 • E. (Buhring, 2001) and MD972142 in the SCS.…”

Section: Stable Carbon and Oxygen Isotopes Of Planktonic Foraminiferasupporting

confidence: 88%

“…Since the Holocene, the abundances of dextral have Figure 6. Time series plots of δ 18 O and δ 13 C of planktonic foraminifera, contrasted with the records in cores MD982195 (Ijiri et al, 2005), MD972142 and Site 184-1144 (Buhring, 2001). Gray bars are the same as those in Fig.…”

Section: Planktonic Foraminiferal Assemblagesmentioning

confidence: 89%

“…Previous studies on past climate changes using sediment cores from the OT show orbital-scale (Ijiri et al, 2005;Kao et al, 2006a;Kawahata et al, 2006;Zhou et al, 2007), millennial and abrupt climatic responses, such as the 8.2 ka event, the Younger Dryas, Heinrich (H) events and the DansgaardOeschger cycles of the Kuroshio (Chang et al, 2008(Chang et al, , 2009Ijiri et al, 2005;Liu et al, 2001;Yu et al, 2009). However, most of these studies were limited by either shorter cores or single-proxy reconstruction (Jian et al, 1998;Kao et al, 2006b;Lee et al, 2013;Ujiié and Ujiié, 1999) that covered only a small spatial scale of the OT which the Kuroshio has entered.…”

Section: Shi Et Al: Kuroshio Evolution Since Mis 51mentioning

confidence: 99%

“…In spite of its high-frequency variation, δ 18 O ruber with a five-point running average in core CSH1 matches well with the SPECMAP (Martinson et al, 1987), Figure 7. Time series plots of temperature, salinity, depth of the thermocline (DOT) and the ratio of shallow/deep species in core CSH1 as well as comparison with the abundances of G.quinqueloba, G.truncatulinoides, N.dutertrei and G.inflata in core CSH1 and other records in cores MD982195 (Ijiri et al, 2005) and DGKS9604 (Yu et al, 2009). Salinity values are given as the difference from the present-day climate, S. Both the distributions of N. dutertrei and G.inflata are related to DOT, but they show different down-core profiles in core CSH1.…”

Section: Stable Carbon and Oxygen Isotopes Of Planktonic Foraminiferamentioning

confidence: 99%

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Multiproxy reconstruction for Kuroshio responses to northern hemispheric oceanic climate and the Asian Monsoon since Marine Isotope Stage 5.1 (∼88 ka)

Shi

Zou

et al. 2014

Clim. Past

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Abstract. The Kuroshio, a western boundary current in the northwestern Pacific, plays a key role in regulating ocean and climate in East Asia. The evolution of the Kuroshio and its branches has been the focus of paleoceanographic studies. In this study, we applied a multiproxy (grain size, planktonic foraminiferal species, δ 18 O, alkenone sea surface temperature (SST) and salinity) reconstruction from sediment core CSH1, which is located at the main axis of the Tsushima Warm Current, a branch of the Kuroshio, in the northern Okinawa Trough (OT). This study, extended the paleoceanographic record of the Kuroshio to Marine Isotope Stage (MIS) 5.1 (∼ 88 ka) from the far northern site in the OT. Planktonic foraminiferal species identified from this core contain warm-water species related to the Kuroshio and coldwater species related to subarctic water mass. The relative abundances of the warm-water species are high during MIS 1 and MIS 5.1, while cold-water species are high during MIS 2. An organic biomarker proxy, alkenone SST measured from core CSH1 ranges between 21 and 25 • C, with higher values during interglacials (MIS 1, 3.3, 5.1) and interstadials and lower values during glacials and Heinrich (H)/stadial events. Sea surface salinity (SSS) and the depth of the thermocline (DOT), reconstructed based on foraminifera isotopes and faunas, indicate dominant Kuroshio responses to an abrupt climate change event recorded in Greenland ice cores and in stalagmites in East China since ∼ 88 ka. The CSH1 SSS appears to be mainly controlled by the local river runoff and the Kuroshio, while the DOT change seems to be closely related to the strength of the Kuroshio and the latitudinal shift of the subarctic frontal zone. Our records suggest that, during MIS 1 and MIS 5.1, while global sea level was high, the Kuroshio was dominant; while during MIS 2, MIS 3 and MIS 4, with a low sea level, stronger winter Asian Monsoon (AM) and a more southerly subarctic front played important roles in governing the hydrographic characteristics in the OT. Spectral analysis of our multiproxy hydrographic records shows a dominant precessional period at ∼ 24 ka. Our hydrographic records, such as SST, SSS and DOT, from a site near the modern Tsushima Warm Current show regional responses corresponding mainly to the global sea level, the Kuroshio, AM and subarctic front, factors which are consistently invoked in the interpretations of other regional records from the OT.

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Section: Stable Carbon and Oxygen Isotopes Of Planktonic Foraminiferasupporting

confidence: 88%

Section: Planktonic Foraminiferal Assemblagesmentioning

confidence: 89%

Section: Shi Et Al: Kuroshio Evolution Since Mis 51mentioning

confidence: 99%

Section: Stable Carbon and Oxygen Isotopes Of Planktonic Foraminiferamentioning

confidence: 99%

See 2 more Smart Citations

Multiproxy reconstruction for Kuroshio responses to northern hemispheric oceanic climate and the Asian Monsoon since Marine Isotope Stage 5.1 (∼88 ka)

Shi

Zou

et al. 2014

Clim. Past

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“…In addition, dispersal of vent shrimp juveniles has been reported in the Mid-Atlantic Ridge (Herring & Dixon 1998). If the flow speed, the possible larval periods and the thermal and pressure tolerance of the shrimps are taken into account, it is most likely that some of the shrimp larvae were successfully dispersed by the water current during a particularly colder age such as the last glacial period (70-10 ka), when the sea surface temperature was 5 8C lower than it is at present (Ijiri et al 2005). Although bresiliid shrimps have not been discovered between the Okinawa Trough and Sagami Bay, it is also possible that the dispersal of the shrimps that had successfully passed the shallow sill was helped by occasional whale carcasses, which are sometimes colonized by the hydrothermal vent fauna (Smith & Baco 2003).…”

Section: K1mentioning

confidence: 99%

Occurrence and recent long-distance dispersal of deep-sea hydrothermal vent shrimps

et al. 2005

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Deep-sea hydrothermal vents and methane seeps are extreme environments that have a high concentration of hydrogen sulphide. However, abundant unique invertebrates including shrimps of the family Bresiliidae have been found in such environments. The bresiliid shrimps are believed to have radiated in the Miocene (less than 20 Myr); however, the period when and the mechanisms by which they dispersed across the hydrothermal vents and cold seeps in oceans worldwide have not been clarified. In the present study, we collected the deep-sea blind shrimp Alvinocaris longirostris from the hydrothermal vent site in the Okinawa Trough and carried out the first investigation of the 18S rRNA gene of a bresiliid shrimp. The phylogenetic analysis revealed that the bresiliid shrimp is situated at an intermediate lineage within the infraorder Caridea and shows monophyly with palaemonid shrimps, which live in shallow sea and freshwater. Furthermore, the mitochondrial cytochrome oxidase I (COI ) gene sequences were analysed to determine the phylogenetic relationship with known bresiliid shrimps. A. longirostris of the Okinawa Trough had two haplotypes of the COI gene, one of which was identical to the Alvinocaris sp. of the cold seeps in Sagami Bay. These results indicate that a longdistance dispersal of A. longirostris occurred possibly within the last 100 000 years.

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Evidence for sea level and monsoonally driven variations in terrigenous input to the northern East China Sea during the last 24.3 ka

Chang

Xiong

et al. 2015

Paleoceanography

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Geochemical and sedimentological analyses of core PC-1 recovered from the northern East China Sea (ECS) provide insights into variations in terrigenous input associated with sea level and climate changes over the past 24.3 ka. Based on high-resolution multiproxy records, our results suggest that the competing processes of sea level and monsoonally driven precipitation determined terrigenous input to the northern ECS. Dominance of terrigenous material, along with relatively light Globigerinoides ruber δ 18 O, indicates that the Last Glacial Maximum (LGM) lowstand of sea level has occurred during the period 21.5-19.6 ka, not suggesting an early slow rise but supporting the conventional LGM age of 21 ka. This LGM lowstand was terminated by the rapid sea level rise of 19 ka meltwater pulse (MWP), which is well expressed by the nearly synchronous decreases in both terrigenous detritus and mean grain size from 19.6 to 18.9 ka. MWP-1A is clearly marked in our records by a sharp reduction in terrigenous input and pronounced maxima of G. ruber δ 18 O at 15.3-14.8 ka, given the considerable age uncertainties of deglacial marine radiocarbon samples. A slightly increasing input of terrigenous matter is noted after 13.4 ka, potentially pointing to a sea level fall following the Inter-Allerød Cooling Period, which was seldom reported previously. Although MWP-1B did not leave robust signatures in terrigenous input, it is explicitly captured by the heavy δ 18 O of G. ruber and decline in mean grain size at 11.5-10.9 ka. MWP-1c probably occurred in a broad millennial interval with multiple peaks, which are robustly marked by the abrupt variations in terrigenous input and marine organic matter at 9.7-9.3 and 9.1 ka, respectively. During the late Holocene, the effect of continuously weakening monsoon precipitation overwhelmed that of stable sea level resulting in a uniform increase in the proportion of marine-derived organic matter after 5.5 ka.

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Paleoenvironmental changes in the northern area of the East China Sea during the past 42,000 years

Cited by 187 publications

References 45 publications

Multiproxy reconstruction for Kuroshio responses to northern hemispheric oceanic climate and the Asian Monsoon since Marine Isotope Stage 5.1 (∼88 ka)

Multiproxy reconstruction for Kuroshio responses to northern hemispheric oceanic climate and the Asian Monsoon since Marine Isotope Stage 5.1 (∼88 ka)

Occurrence and recent long-distance dispersal of deep-sea hydrothermal vent shrimps

Evidence for sea level and monsoonally driven variations in terrigenous input to the northern East China Sea during the last 24.3 ka

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