Ocean overturning since the Late Cretaceous: Inferences from a new benthic foraminiferal isotope compilation

Cramer, Benjamin; Toggweiler, J. R.; Wright, James D.; Katz, Miriam; Miller, Kenneth G.

doi:10.1029/2008pa001683

Cited by 523 publications

(658 citation statements)

References 124 publications

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“…NADW-like) in the Southern Ocean (Billups et al, 2002;Pekar et al, 2006;Villa and Persico, 2006;Scher and Martin, 2008;Liebrand et al, 2011). These data are also in 675 agreement with the δ 13 C global isotopes oscillations between 26 and 25 Ma (Cramer et al, 2009), that suggest low values for an AABW and high δ 13 C values for a NADW, that may represent the different oceanic primary production and ventilation rates, as proposed in this work. In addition, δ 13 C records on the Atlantic show systematic offsets to lower values toward a North Atlantic signal for most of the late Oligocene to early Miocene.…”

supporting

confidence: 89%

“…Nevertheless, there are marked differences between the late Oligocene low δ 18 O values recorded in 110 Pacific, Indian and Atlantic Ocean sites (e.g., Pälike et al, 2006;Cramer et al, 2009;Liebrand et al, 2011;Mudelsee et al, 2014;Hauptvogel et al, 2017), and the sustained high δ 18 O values recorded in Southern Ocean sites (Pekar et al, 2006;Mudelsee et al, 2014). High δ 18 O values in the Southern Ocean sediments are in agreement with the ice proximal record recovered by the Cape Roberts Project (CRP) in the Ross Sea, which show the existence of glaciers/ice sheets at sea level (Barrett et al, 2007; 115 Hauptvogel et al, 2017).…”

Section: Introductionmentioning

confidence: 99%

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Late Oligocene obliquity-paced contourite sedimentation in the Wilkes Land margin of East Antarctica: implications for paleoceanographic and ice sheet configurations

Salabarnada

Escutia

Röhl

et al. 2017

Preprint

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The late Oligocene experienced atmospheric concentrations of CO 2 between 400 and 750 ppm, which are within the IPCC projections for this century, assuming unabated CO 2 emissions. However, Antarctic Unlike today, the continental shelf was not over-deepened, and thus marine-based ice sheet expansion was likely limited to coastal regions. Combined, these data suggest that ice sheets in the Wilkes 60 Subglacial Basin were largely land-based, and therefore retreated as a consequence of surface melt during late Oligocene, rather than direct ocean forcing and marine ice sheet instability processes as it did in younger past warm intervals. Spectral analysis on late Oligocene sediments from the eastern Wilkes Land margin show that the glacial-interglacial cyclicity and resulting displacements of the Southern Ocean frontal systems between 26-25 Ma were forced by obliquity. 65Clim. Past Discuss., https://doi

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supporting

confidence: 89%

Section: Introductionmentioning

confidence: 99%

Late Oligocene obliquity-paced contourite sedimentation in the Wilkes Land margin of East Antarctica: implications for paleoceanographic and ice sheet configurations

Salabarnada

Escutia

Röhl

et al. 2017

Preprint

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“…If directly compared to global climate changes as indicated in oxygen-isotope values (Zachos et al, 2001a(Zachos et al, , 2008Cramer et al, 2009), the averaged mean annual temperature record shows similar signals during the Palaeogene. The transition from the Priabonian to the early Oligocene is reflected in a temperature decrease (Fig.…”

Section: Further Comparison With Global Signals and Outlookmentioning

confidence: 99%

“…Herein, we use estimates of the site-shoreline distance based on the ratio of marine palynomorphs (dinocysts, forams) to . Pollen-based mean annual temperature reconstruction and deciduous-evergreen forest taxa pollen percentages for Site M0027 vs. age compared to a stacked and smoothed oxygen-isotope record from the Pacific (after Cramer et al, 2009), global oxygen-isotopes after Zachos et al (2001aZachos et al ( , 2008, and global events (position of Mi events after Miller et al, 1991;Pekar and DeConto, 2006). Age model for Site M0027 after and Miller et al (2013).…”

Section: Assessment Of Palynomorph Associations and Pollen Differentimentioning

confidence: 99%

Late Eocene to middle Miocene (33 to 13 million years ago) vegetation and climate development on the North American Atlantic Coastal Plain (IODP Expedition 313, Site M0027)

Kotthoff¹,

Greenwood

McCarthy

et al. 2014

Clim. Past

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Abstract.We investigated the palynology of sediment cores from Site M0027 of IODP (Integrated Ocean Drilling Program) Expedition 313 on the New Jersey shallow shelf to examine vegetation and climate dynamics on the east coast of North America between 33 and 13 million years ago and to assess the impact of over-regional climate events on the region. Palynological results are complemented with pollenbased quantitative climate reconstructions. Our results indicate that the hinterland vegetation of the New Jersey shelf was characterized by oak-hickory forests in the lowlands and conifer-dominated vegetation in the highlands from the early Oligocene to the middle Miocene. The Oligocene witnessed several expansions of conifer forest, probably related to cooling events. The pollen-based climate data imply an increase in annual temperatures from ∼ 11.5 • C to more than 16 • C during the Oligocene.The Mi-1 cooling event at the onset of the Miocene is reflected by an expansion of conifers and mean annual temperature decrease of ∼ 4 • C, from ∼ 16 • C to ∼ 12 • C around 23 million years before present. Relatively low annual temperatures are also recorded for several samples during an interval around ∼ 20 million years before present, which may reflect the Mi-1a and the Mi-1aa cooling events. Generally, the Miocene ecosystem and climate conditions were very similar to those of the Oligocene. Miocene grasslands, as known from other areas in the USA during that time period, are not evident for the hinterland of the New Jersey shelf, possibly reflecting moisture from the proto-Gulf Stream.The palaeovegetation data reveal stable conditions during the mid-Miocene climatic optimum at ∼ 15 million years before present, with only a minor increase in deciduousevergreen mixed forest taxa and a decrease in swamp forest taxa. Pollen-based annual temperature reconstructions show average annual temperatures of ∼ 14 • C during the midMiocene climatic optimum, ∼ 2 • C higher than today, but ∼ 1.5 • C lower than preceding and following phases of the Miocene. We conclude that vegetation and regional climate in the hinterland of the New Jersey shelf did not react as sensitively to Oligocene and Miocene climate changes as other regions in North America or Europe due to the moderating effects of the North Atlantic. An additional explanation for the relatively low regional temperatures reconstructed for the mid-Miocene climatic optimum could be an uplift of the Appalachian Mountains during the Miocene, which would also have influenced the catchment area of our pollen record.

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“…This date of onset of drift building at the Eirik Drift is used in further investigations by several authors (e.g. Wright, 1998;Cramer et al, 2009;Miller et al, 2009). On the other hand, recent works of Hunter et al (2007a) and Hunter et al (2007b) based their investigations at the Eirik Drift on the interpretation from Arthur et al (1989) with the onset of deep-current controlled sedimentation at 4.5 Ma.…”

Section: Introductionmentioning

confidence: 99%

A revised Early Miocene age for the instigation of the Eirik Drift, offshore southern Greenland: Evidence from high-resolution seismic reflection data

2013

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Ocean overturning since the Late Cretaceous: Inferences from a new benthic foraminiferal isotope compilation

Cited by 523 publications

References 124 publications

Late Oligocene obliquity-paced contourite sedimentation in the Wilkes Land margin of East Antarctica: implications for paleoceanographic and ice sheet configurations

Late Oligocene obliquity-paced contourite sedimentation in the Wilkes Land margin of East Antarctica: implications for paleoceanographic and ice sheet configurations

Late Eocene to middle Miocene (33 to 13 million years ago) vegetation and climate development on the North American Atlantic Coastal Plain (IODP Expedition 313, Site M0027)

A revised Early Miocene age for the instigation of the Eirik Drift, offshore southern Greenland: Evidence from high-resolution seismic reflection data

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