Benthic foraminiferal stable isotopes, planktonic foraminiferal biostratigraphy and seismic profiles for IODP Site 356-U1463

Groeneveld, Jeroen; Vleeschouwer, David De; McCaffrey, Jackson; Gallagher, Stephen

doi:10.1594/pangaea.921913

Cited by 2 publications

(3 citation statements)

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“…The benthic δ 18 O record was then used for further tuning the global benthic δ 18 O stack LR04 (Lisiecki & Raymo, 2005). The high-resolution expression of glacial-interglacial cycles in the TEX 86 record presented here was used for fine tuning the latest Pliocene and Pleistocene cycles (Groeneveld et al, 2020). This new age model extends the range of previously published orbital age models for the site on both the older and younger end (Auer et al, 2019;De Vleeschouwer et al, 2018) and increases the temporal resolution and precision of the age model published by Christensen et al (2017).…”

Section: Research Articlementioning

confidence: 99%

“…Additionally, nine NWS modern (surface) sediment samples that were previously collected during RV SONNE cruise SO257 (Kuhnt et al, 2017) were also analyzed in this study (supporting information Table S1). The IODP Site U1463 age model used here is based on benthic foraminiferal δ 13 C and δ 18 O of Uvigerina spp., as detailed in Groeneveld et al (2020) (supporting information Figure S1). Spectral analysis on the δ 13 C record revealed the presence of the 405-kyr eccentricity record that could be correlated to the global carbon cycles (cycles 5 to 12; Groeneveld et al, 2020;Laskar et al, 2004).…”

Section: Research Articlementioning

confidence: 99%

“…The IODP Site U1463 age model used here is based on benthic foraminiferal δ 13 C and δ 18 O of Uvigerina spp., as detailed in Groeneveld et al (2020) (supporting information Figure S1). Spectral analysis on the δ 13 C record revealed the presence of the 405-kyr eccentricity record that could be correlated to the global carbon cycles (cycles 5 to 12; Groeneveld et al, 2020;Laskar et al, 2004).…”

Section: Research Articlementioning

confidence: 99%

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Retracted: Plio‐Pleistocene Indonesian Throughflow Variability Drove Eastern Indian Ocean Sea Surface Temperatures

Smith

Castañeda

Groeneveld

et al. 2020

Paleoceanog and Paleoclimatol

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Ocean gateways facilitate circulation between ocean basins, thereby impacting global climate. The Indonesian Gateway transports water from the Pacific to the Indian Ocean via the Indonesian Throughflow (ITF) and drives the strength and intensity of the modern Leeuwin Current, which carries warm equatorial waters along the western coast of Australia to higher latitudes. Therefore, ITF dynamics are a vital component of global thermohaline circulation. Plio-Pleistocene changes in ITF behavior and Leeuwin Current intensity remain poorly constrained due to a lack of sedimentary records from regions under its influence. Here, organic geochemical proxies are used to reconstruct sea surface temperatures on the northwest Australian shelf at IODP Site U1463, downstream of the ITF outlet and under the influence of the Leeuwin Current. Our records, based on TEX 86 and the long-chain diol index, provide insight into past ITF variability (3.5-1.5 Ma) and confirm that sea surface temperature exerted a control on Australian continental hydroclimate. A significant TEX 86 cooling of~5°C occurs within the mid-Pliocene Warm Period (3.3-3.1 Ma) suggesting that this interval was characterized by SST fluctuations at Site U1463. A major feature of both the TEX 86 and long-chain diol index records is a strong cooling from~1.7 to 1.5 Ma. We suggest that this event reflects a reduction in Leeuwin Current intensity due to a major step in ongoing ITF constriction, accompanied by a switch from South to North Pacific source waters entering the ITF inlet. Our new data suggest that an additional ITF constriction event may have occurred in the Pleistocene. Plain Language Summary The Indonesian Throughflow (ITF) represents warm water masses flowing from the western Pacific into the Indian Ocean. The ITF flows through the narrow marine passages of the Indonesian Archipelago. This Indonesian Gateway in turn limits the amount of water moving from the Pacific into the Indian Ocean. The depth and width of the Indonesian Gateway has decreased gradually over the past 5 million years due to tectonic movement, which has caused Indonesian islands such as New Guinea and Halmahera to grow and block water entering the Indonesian Archipelago from the warm South Pacific. As a result, most ITF water now derives from the cooler North Pacific, which impacts Indian Ocean temperatures and broader global ocean circulation and heat distribution. The timing of this shallowing of the Indonesian Gateway and transition from warmer South Pacific to cooler North Pacific ITF source waters is not yet fully understood. Here, we present a new sea surface temperature record from near the ITF outlet that shows intense cooling just after 1.7 million years ago. We suggest that this cooling occurred in response to a significant step in the ongoing tectonic constriction and shallowing of the Indonesian Gateway.

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Section: Research Articlementioning

confidence: 99%

Section: Research Articlementioning

confidence: 99%

Section: Research Articlementioning

confidence: 99%

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Retracted: Plio‐Pleistocene Indonesian Throughflow Variability Drove Eastern Indian Ocean Sea Surface Temperatures

Smith

Castañeda

Groeneveld

et al. 2020

Paleoceanog and Paleoclimatol

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Dating the Northwest Shelf of Australia Since the Pliocene

Groeneveld

Vleeschouwer

McCaffrey

et al. 2021

Geochem Geophys Geosyst

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Accurate dating of marine sediments is essential to reconstruct past changes in oceanography and climate (Bronk Ramsey, 2009; Huybers & Wunsch, 2004; Lisiecki & Lisiecki, 2002). Global stacks, compilations or splices of long-term oxygen isotope records related to ice volume and temperature are commonly applied to correlate deep ocean records, and to construct age models (De Vleeschouwer et al., 2017; Lisiecki & Raymo, 2005; Zachos et al., 2001). However, for proximal settings with high sedimentation rates such stacks cannot always be used. The supply of large amounts of sediments may dilute the number of microfossils in the sediment to such a degree that geochemical analyses needed to perform the correlation to a global

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Benthic foraminiferal stable isotopes, planktonic foraminiferal biostratigraphy and seismic profiles for IODP Site 356-U1463

Cited by 2 publications

References 0 publications

Retracted: Plio‐Pleistocene Indonesian Throughflow Variability Drove Eastern Indian Ocean Sea Surface Temperatures

Retracted: Plio‐Pleistocene Indonesian Throughflow Variability Drove Eastern Indian Ocean Sea Surface Temperatures

Dating the Northwest Shelf of Australia Since the Pliocene

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