Climate change and response in bottom water circulation and sediment provenance in the Central Arctic Ocean since the Last Glacial

Meinhardt, Ann-Katrin; Pahnke, Katharina; Böning, Philipp; Schnetger, Bernhard; Brumsack, H.-J.

doi:10.1016/j.chemgeo.2016.02.019

Cited by 15 publications

(12 citation statements)

References 69 publications

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“…9 Horikawa et al, 2011;Asahara et al, 2012;Carter et al, 2012;Chen et al, 2012;López Correa et al, 2012;Piotrowski et al, 2012;Wilson et al, 2012;Xie et al, 2012;Haley and Polyak, 2013;Jang et al, 2013;Kraft et al, 2013;Maccali et al, 2013;Montero-Serrano et al, 2013;Noble et al, 2013;Pena et al, 2013;Skinner et al, 2013;Achyuthan et al, 2014;Huang et al, 2014;Molina-Kescher et al, 2014;Werner et al, 2014;Jiménez-Amat and Zahn, 2015;Jonkers et al, 2015 ;Roberts and Piotrowski, 2015;Abbott et al, 2016;Du et al, 2016;Dubois-Dauphin et al, 2016b ;Howe et al, 2016a;Hu et al, 2016 ;Lang et al, 2016;Lippold et al, 2016;Meinhardt et al, 2016 ;Wei et al, 2016) (Figure 1).…”

Section: Accepted Manuscriptunclassified

The large-scale evolution of neodymium isotopic composition in the global modern and Holocene ocean revealed from seawater and archive data

et al. 2017

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International audienceNeodymium isotopic compositions (143Nd/144Nd or εNd) have been used as a tracer of water masses and lithogenic inputs to the ocean. To further evaluate the faithfulness of this tracer, we have updated a global seawater εNd database and combined it with hydrography parameters (temperature, salinity, nutrients and oxygen concentrations), carbon isotopic ratio and radiocarbon of dissolved inorganic carbon. Archive εNd data are also compiled for leachates, foraminiferal tests, deep-sea corals and fish teeth/debris from the Holocene period (< 10,000 years).At water depths ≥ 1500 m, property-property plots show clear correlations between seawater εNd and the other variables, suggesting that large-scale water mass mixing is a primary control of deepwater εNd distribution. At ≥ 200 m, basin-scale seawater T-S-εNd diagrams demonstrate the isotopic evolution of different water masses. Seawater and archive εNd values are compared using property-property plots and T-S-εNd diagrams. Archive values generally agree with corresponding seawater values although they tend to be at the upper limit in the Pacific. Both positive and negative offsets exist in the northern North Atlantic. Applying multiple regression analysis to deep (≥ 1500 m) seawater data, we established empirical equations that predict the main, large-scale, deepwater εNd trends from hydrography parameters. Large offsets from the predicted values are interpreted as a sign of significant local/regional influence. Dominant continental influence on seawater and archive εNd is observed mainly within 1000 km from the continents. Generally, seawater and archive εNd values form gradual latitudinal trend in the Atlantic and Pacific at depths ≥ 600 m, consistent with the idea that Nd isotopes help distinguish between northern/southern sourced water contributions at intermediate and deep water depths

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Section: Accepted Manuscriptunclassified

The large-scale evolution of neodymium isotopic composition in the global modern and Holocene ocean revealed from seawater and archive data

et al. 2017

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“…After a powdering a large representative volume of the original sediment 700 mg of material were removed and mixed with 4200 mg lithiumtetraborate, preheated overnight to 500˚C, fused to glass beads and analyzed with the X-ray spectrometer, which is calibrated against 65 standards from the Chinese IGGE series, French CRPG series, Japanese GSJ series, Canadian CCRMP series, German ZGI series and the USGS series.. Analytical precision and accuracy were checked with in-house standards (PS-S, Loess, TW-TUC; e.g. Meinhardt et al (2016)) and were better than 2% for major elements and 10% for trace elements. The results are shown in Table 2.…”

Section: Bulk Geochemistrymentioning

confidence: 99%

“…Measurements were accompanied by multiple analyses of NBS987 with sample-like concentrations, and 87 Sr /86 Sr ratios of all samples were normalized to the reported value of 0.710248 (Thirlwall, 1991). Monitored krypton "gas blanks", as well as Rb and Ba contents, were found to be negligible (Meinhardt et al, 2016).…”

Section: Bulk Geochemistrymentioning

confidence: 99%

Controls on modern erosion and the development of the Pearl River drainage in the late Paleogene

et al. 2017

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The Pearl River and its tributaries drains large areas of southern China and has been the primary source of sediment to the northern continental margin of the South China Sea since its opening. In this study we use a combination of bulk sediment geochemistry, Nd and Sr isotope geochemistry, and single grain zircon U-Pb dating to understand the source of sediment in the modern drainage. We also performed zircon U-Pb dating on Eocene sedimentary rocks sampled by International Ocean Discovery Program (IODP) Expedition

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“…Surface sediments (triangles): Asahara et al (2012), Bazhenova et al (2017), and Maccali et al (2018). Sediment cores (diamonds): Winter et al (1997), Haley, Frank, Spielhagen, and Fietzke (2008), and Meinhardt et al (2016). Rivers.…”

Section: Introductionmentioning

confidence: 99%

“…A limited number of isotope information is available on seafloor sediments recovered by core tops from the central Arctic Ocean (Bazhenova et al, 2017; Eisenhauer et al, 1999; Fagel et al, 2014; Haley, Frank, Spielhagen, & Fietzke, 2008; Meinhardt et al, 2016; Winter et al, 1997). Due to low sedimentation rates and coring disturbances, these data likely represent generalized Holocene environments.…”

Section: Introductionmentioning

confidence: 99%

Isotopic Fingerprints of Ice‐Rafted Debris Offer New Constraints on Middle to Late Quaternary Arctic Circulation and Glacial History

Dong

Polyak

Liu

et al. 2020

Geochem Geophys Geosyst

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For the first time, ice‐rafted debris provenance related to the Quaternary glacial discharge and circulation was constrained using radiogenic Sr, Nd, and Pb isotopes from a sedimentary record (Core BN05) from the central Arctic Ocean. The record is composed of glacial/interglacial intervals estimated to span ~0.5 Ma (Marine Isotope Stages [MIS] 1–14). Nd versus Sr isotope data show two end member groups, further elaborated using Pb isotopes. Glacial data mostly point at North American sources with unradiogenic εNd and high 87Sr/86Sr values, including detrital carbonate (dolomite) layers originating from Paleozoic rocks eroded by the Laurentide Ice Sheet. The opposite end member group including estimated MIS6 and MIS4 samples indicates the Siberian Large Igneous Province eroded by the Eurasian Ice Sheet as the major source, possibly with additional inputs from the East Siberian Ice Sheet. The limited evidence for Siberian Ice Sheet provenance may result from the predominant distribution of this glaciation on the continental shelf providing weak, fine‐grained sediments. Glacial‐time western Arctic circulation inferred from isotopic data is mostly similar to the modern Beaufort Gyre but was more streamlined toward the Fram Strait during some glacial events. Interglacial/major interstadial, presumably sea ice transported sediments, shows a mixture of North American and Siberian sources, consistent with historically observed variations in the Transpolar Drift versus Beaufort Gyre circulation. Isotope pattern in major interglacials (e.g., MIS5e, MIS11, and MIS 13) resembles the recent trend of increased sediment ice transport from the East Siberian/Chukchi Sea, possibly in relation to the ongoing Arctic warming.

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Climate change and response in bottom water circulation and sediment provenance in the Central Arctic Ocean since the Last Glacial

Cited by 15 publications

References 69 publications

The large-scale evolution of neodymium isotopic composition in the global modern and Holocene ocean revealed from seawater and archive data

The large-scale evolution of neodymium isotopic composition in the global modern and Holocene ocean revealed from seawater and archive data

Controls on modern erosion and the development of the Pearl River drainage in the late Paleogene

Isotopic Fingerprints of Ice‐Rafted Debris Offer New Constraints on Middle to Late Quaternary Arctic Circulation and Glacial History

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