Stable oxygen isotope distribution in the Huanghe (Yellow River) and the Changjiang (Yangtze River) estuarine systems

Zhang, Jing; Lètolle, René; Martin, Jean Marie; Jusserand, C.; Mouchel, Jean Marie

doi:10.1016/0278-4343(90)90057-s

Cited by 46 publications

(27 citation statements)

References 12 publications

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“…The δ 18 O values in the water from the Yangtze and Yellow rivers range from ∼ −8.8 to −7.1 ‰ (Zhang et al, 1990), which is consistent with the intercepts in Eqs. (4) and (5), and therefore both Eqs.…”

Section: Salinitysupporting

confidence: 82%

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: Salinitysupporting

confidence: 82%

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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“…This value is consistent with the δ 18 O values (−8.4 to −7.1 ‰) for Changjiang River water in January and July (Zhang et al 1990). However, the regression lines of the δ 18 O sw -salinity relationships developed for the Changjiang River mouth and the western part of the ECS indicate lower δ …”

supporting

confidence: 90%

“…This Changjiang River water extends offshore, and therefore, the water mass characteristics of the offshore ECS can be roughly described by the binary mixing of the cooler, less saline CDW and the warmer, more saline Kuroshio water (Zhang et al 1990;Ichikawa and Beardsley 2002;Zhang et al 2007). In contrast, there are other local water masses in the coastal ECS and the Yellow Sea, such as the TWWC and the Yellow Sea Central Cold Water (YSCCW) (Fig.…”

Section: Oceanographic Settingmentioning

confidence: 99%

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δ 18Osw estimate for Globigerinoides ruber from core-top sediments in the East China Sea

Horikawa

Kodaira

Zhang

et al. 2015

Prog. in Earth and Planet. Sci.

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The paired analyses of the Mg/Ca ratio and oxygen isotopic composition (δ 18 O c ) of surface-dwelling planktonic foraminifera have become a widely used method for reconstructing the oxygen isotopic composition of ambient seawater (δ 18 O sw ) as a robust proxy for surface salinity. Globigerinoides ruber (G. ruber) is a mixed-layer dweller, and its fossil shell is an ideal archive for recording past sea surface water conditions, such as those caused by variability in the East Asian summer monsoon (EASM). Here, we investigate the validity of shell-derived δ 18 O sw estimates for G. ruber using core-top sediments from the East China Sea (ECS). First, we determined a local δ . There was not a significant relationship between the salinity and Ba/Ca G. ruber ratios due to the highly variable Ba/Ca G. ruber data. Given the seawater Ba/Ca data and the published partition coefficient for Ba (D Ba = 0.15-0.22), pristine Ba/Ca G. ruber ratios at northern Okinawa Trough sites should be less than 0.84 μmol mol ) might be attributable to contamination by sedimentary barite adherent on fossil shells. Therefore, further evaluation of the Ba/Ca G. ruber ratio as a paleo-salinity proxy requires diethylene triamine pentaacetic acid (DTPA)-cleaned Ba/Ca data that can minimize the influence of barite contamination.

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“…It is interesting to note that the Yellow river, which flows from the Chinese side of the Himalaya, has similar d 18 O in the freshwater end member, viz. À 8.0x to À 7.0x during both summer and winter months of 1986 (Zhang et al, 1990). In addition, the d 18 O vs. salinity plot has an almost identical relationship (Eq.…”

mentioning

confidence: 62%

Geochemical cycling in the Hooghly estuary, India

2002

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Stable oxygen isotope distribution in the Huanghe (Yellow River) and the Changjiang (Yangtze River) estuarine systems

Cited by 46 publications

References 12 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)

δ 18Osw estimate for Globigerinoides ruber from core-top sediments in the East China Sea

Geochemical cycling in the Hooghly estuary, India

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