Quaternary ostracode and foraminiferal biostratigraphy and paleoceanography in the western Arctic Ocean

Cronin, Thomas M.; DeNinno, Lauren H.; Polyak, Leonid; Caverly, E. K.; Poore, Richard Z.; Brenner, Alec R.; Rodríguez-Lázaro, Julio; Marzen, R. E.

doi:10.1016/j.marmicro.2014.05.001

Cited by 47 publications

(58 citation statements)

References 68 publications

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“…Notably, Stein et al (2010) were also able to use multiple criteria to correlate cores from Mendeleev and Northwind Ridges in the western Arctic Ocean, including two cores studied here (P1-92-30, P1-92-40). Our results support those of Stein et al and prior workers that lithostratigraphy and regional biostratigraphy, augmented with various other methods, can be used to establish sedimentation rates and to correlate Quaternary sediments from most Arctic ridges (Stein et al, 2010;Cronin et al, 2014).…”

Section: Chronostratigraphy and Age Modelssupporting

confidence: 91%

“…The most important age-dating methods are briefly summarized as follows and the reader is referred to these sources for detailed discussions: Backman et al, 2004;Polyak et al, 2009;Stein et al, 2012;Cronin et al, 2014. 1) Radiocarbon dating. More than 200 radiocarbon dates, most using accelerated mass spectrometry (AMS) on mollusks, benthic and planktic foraminifers are available from box, multi-and piston cores from Arctic Ocean ridges (Poirier et al, 2012).…”

Section: Chronostratigraphy and Age Modelsmentioning

confidence: 99%

“…When identified, the pink-white (PW) sediment layers PW 1 (MIS 8 to 7) and PW 2 (early MIS 5) representing ice-rafting events of North American Paleozoic dolomite were used to check for a reasonable alignment between cores (tie points from Table 3 of Cronin et al, 2014). The B. aculeata and T. egelida foraminiferal zones are particularly important because they are traceable across most of the central Arctic Ocean (Hanslik et al, 2013;Cronin et al, 2014). These tie points allow correlation of sediments deposited from MIS 13 to MIS 1 (about the last 550 ka) so that individual records of microfaunal density can be aligned and stacked.…”

Section: Chronostratigraphy and Age Modelsmentioning

confidence: 99%

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Calcareous microfossil-based orbital cyclostratigraphy in the Arctic Ocean

Marzen

DeNinno

Cronin

2016

Quaternary Science Reviews

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Section: Chronostratigraphy and Age Modelssupporting

confidence: 91%

Section: Chronostratigraphy and Age Modelsmentioning

confidence: 99%

Section: Chronostratigraphy and Age Modelsmentioning

confidence: 99%

See 1 more Smart Citation

Calcareous microfossil-based orbital cyclostratigraphy in the Arctic Ocean

Marzen

DeNinno

Cronin

2016

Quaternary Science Reviews

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“…Such events are indicative of rapid environmental change. For example, prior studies have documented range shifts in Arctic benthic foraminifera during the last deglacial and Holocene intervals from the eastern Arctic Ocean (Wollenburg et al, 2001), the Laptev Sea (Taldenkova et al, 2008(Taldenkova et al, , 2012, the Beaufort Sea and Amundsen Gulf (Scott et al, 2009) and in older sediments (Polyak et al, 1986Ishman and Foley, 1996;Cronin et al, 2014). The SWERUS-32 data reveal two Rabilimis…”

Section: Rabilimis Mirabilis: New Faunal Events Signifying Rapid Oceamentioning

confidence: 94%

“…P. caudata has varying percentages (3-14 %) in sediment dated ∼ 40-12 ka, depending on the site. P. caudata is an indicator of AIW and Cronin et al (2014) report that it appears to be ecologically linked to the surface conditions. Cytheropteron spp.…”

Section: Mis 3-2 ( ∼ 50-15 Ka)mentioning

confidence: 99%

Central Arctic Ocean paleoceanography from ∼  50 ka to present, on the basis of ostracode faunal assemblages from the SWERUS 2014 expedition

et al. 2017

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Abstract. Late Quaternary paleoceanographic changes at the Lomonosov Ridge, central Arctic Ocean, were reconstructed from a multicore and gravity core recovered during the 2014 SWERUS-C3 Expedition. Ostracode assemblages dated by accelerator mass spectrometry (AMS) indicate changing sea-ice conditions and warm Atlantic Water (AW) inflow to the Arctic Ocean from ∼ 50 ka to present. Key taxa used as environmental indicators include Acetabulastoma arcticum (perennial sea ice), Polycope spp. (variable seaice margins, high surface productivity), Krithe hunti (Arctic Ocean deep water), and Rabilimis mirabilis (water mass change/AW inflow). Results indicate periodic seasonally seaice-free conditions during Marine Isotope Stage (MIS) 3 (∼ 57-29 ka), rapid deglacial changes in water mass conditions (15-11 ka), seasonally sea-ice-free conditions during the early Holocene (∼ 10-7 ka) and perennial sea ice during the late Holocene. Comparisons with faunal records from other cores from the Mendeleev and Lomonosov ridges suggest generally similar patterns, although sea-ice cover during the Last Glacial Maximum may have been less extensive at the new Lomonosov Ridge core site (∼ 85.15 • N, 152 • E) than farther north and towards Greenland. The new data provide evidence for abrupt, large-scale shifts in ostracode species depth and geographical distributions during rapid climatic transitions.

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A New Chronology of Late Quaternary Sequences From the Central Arctic Ocean Based on “Extinction Ages” of Their Excesses in ²³¹Pa and ²³⁰Th

Hillaire‐Marcel

Ghaleb

Vernal

et al. 2017

Geochem Geophys Geosyst

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Merging the late Quaternary Arctic paleoceanography into the Earth's global climate history remains challenging due to the lack of robust marine chronostratigraphies. Over ridges notably, low and variable sedimentation rates, scarce biogenic remains ensuing from low productivity and/or poor preservation, and oxygen isotope and paleomagnetic records differing from global stacks represent major impediments. However, as illustrate here based on consistent records from Mendeleev‐Alpha and Lomonosov Ridges, disequilibria between U‐series isotopes can provide benchmark ages. In such settings, fluxes of the particle‐reactive U‐daughter isotopes 230Th and 231Pa from the water column, are not unequivocally linked to sedimentation rates, but rather to sea‐ice rafting and brine production histories, thus to the development of sea‐ice factories over shelves during intervals of high relative sea level. The excesses in 230Th and 231Pa over fractions supported by their parent U‐isotopes, collapse down sedimentary sequences, due to radioactive decay, and provide radiometric benchmark ages of approximately 300 and 140 ka, respectively. These “extinction ages” point to mean sedimentation rates of ∼4.3 and ∼1.7 mm/ka, respectively, over the Lomonosov and Mendeleev Ridges, which are significantly lower than assumed in most recent studies, thus highlighting the need for revisiting current interpretations of Arctic lithostratigraphies in relation to the global‐scale late Quaternary climatostratigraphy.

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Quaternary ostracode and foraminiferal biostratigraphy and paleoceanography in the western Arctic Ocean

Cited by 47 publications

References 68 publications

Calcareous microfossil-based orbital cyclostratigraphy in the Arctic Ocean

Calcareous microfossil-based orbital cyclostratigraphy in the Arctic Ocean

Central Arctic Ocean paleoceanography from ∼  50 ka to present, on the basis of ostracode faunal assemblages from the SWERUS 2014 expedition

A New Chronology of Late Quaternary Sequences From the Central Arctic Ocean Based on “Extinction Ages” of Their Excesses in ²³¹Pa and ²³⁰Th

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Quaternary ostracode and foraminiferal biostratigraphy and paleoceanography in the western Arctic Ocean

Cited by 47 publications

References 68 publications

Calcareous microfossil-based orbital cyclostratigraphy in the Arctic Ocean

Calcareous microfossil-based orbital cyclostratigraphy in the Arctic Ocean

Central Arctic Ocean paleoceanography from ∼ 50 ka to present, on the basis of ostracode faunal assemblages from the SWERUS 2014 expedition

A New Chronology of Late Quaternary Sequences From the Central Arctic Ocean Based on “Extinction Ages” of Their Excesses in 231Pa and 230Th

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Central Arctic Ocean paleoceanography from ∼  50 ka to present, on the basis of ostracode faunal assemblages from the SWERUS 2014 expedition

A New Chronology of Late Quaternary Sequences From the Central Arctic Ocean Based on “Extinction Ages” of Their Excesses in ²³¹Pa and ²³⁰Th