Oxygen isotopes and sea level

Chappell, John; Shackleton, Nicholas J

doi:10.1038/324137a0

Cited by 1,553 publications

(796 citation statements)

References 34 publications

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“…The age control demonstrates that, in general, this correlation is correct and each sequence was formed in response to glacioeustatic cycles of 100 kyr (Fig. 5), such as that represented in oxygen isotope records where there is a downward trend from (Chappell & Shackleton 1986, Martinson et al 1987Raymo et al 1989;Gibbard & Cohen 2009). …”

Section: Discussionmentioning

confidence: 99%

High-Frequency Sequences in the Quaternary of Pelotas Basin (coastal plain): a record of degradational stacking as a function of longer-term base-level fall

Rosa

Barboza

Abreu³

et al. 2017

Braz. J. Geol.

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ABSTRACT:The aim of this work was to analyze the sedimentary record of the coastal plain of Pelotas Basin, placing it in the context of temporal and spatial scales, and proposing a stratigraphic hierarchical framework. The coastal plain, located in southern Brazil and in northern Uruguay, is mainly formed by four Quaternary barrier-lagoon systems. Three of these systems were studied through the integration of surface and subsurface data (geomorphological and topographical mapping, outcrops description, geoprocessing, dating and Ground Penetrating Radar -GPR -records) and interpreted as the preserved, onshore portion of depositional sequences mainly controlled by glacioeustatic cycles of about 100 kyr. The stacking pattern comprising these sequences is progradational with seaward downsteping (highest sea-levels measured: 9.5, 8 and 3 m, respectively), comprehending a degradational sequence set, or the regressive/ falling stage systems tract of a higher order depositional sequence identified in seismic sections, with about 0.5 Ma. The youngest sequence has diachronous systems tracts -while some sectors have already transitioned from the transgressive to the highstand/falling stage systems tract, others are still under a transgressive context. It indicates that, in this time and scale, the sea level is not the main control of coastal evolution, and autogenic factors are fundamental in the run of geological record. KEYWORDS:Barrier-Lagoon; Glacioeustasy; Diachronism of Systems Tracts; Ground Penetrating Radar; Rio Grande do Sul coastal evolution. RESUMO:

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Section: Discussionmentioning

confidence: 99%

High-Frequency Sequences in the Quaternary of Pelotas Basin (coastal plain): a record of degradational stacking as a function of longer-term base-level fall

Rosa

Barboza

Abreu³

et al. 2017

Braz. J. Geol.

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“…A major question that arises in these observations is that based on sea level history from uplifted reefs on New Guinea and Barbados, paleo-sea levels during the high-sea stands at~80 ka and 100 ka are estimated to be À15 m to À20 m, relative to present (Chappell and Shackleton, 1986;Bard et al, 1990;Cutler et al, 2003;Potter et al, 2004;Thompson and Goldstein, 2005; see also Murray-Wallace and Woodroffe (2014), pp. 288e292).…”

Section: Marine Terrace Ages and Sea-level Historymentioning

confidence: 99%

Coastal tectonics on the eastern margin of the Pacific Rim: late Quaternary sea-level history and uplift rates, Channel Islands National Park, California, USA

Muhs

Simmons

Schumann

et al. 2014

Quaternary Science Reviews

150

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“…(Largely) floating Arctic ice shelves during glacial intervals were proposed in the 1970s and 1980s (Mercer, 1970;Hughes et al, 1977;Broecker, 1975;Grosswald, 1980;Denton and Hughes, 1981;Williams et al, 1981;Chappell and Shackleton, 1986), but then were overlooked due to difficulties in obtaining data from the region and a lack of direct evidence for such shelves during the LGM (for an overview, see Jakobsson et al, 2016). Recent geophysical mapping in the Arctic, however, has led to a re-evaluation of large floating Arctic ice shelves during the Pleistocene.…”

Section: The Global D 18 O:sea-level/ice-volume Relationshipmentioning

confidence: 99%

Differences between the last two glacial maxima and implications for ice-sheet, δ18O, and sea-level reconstructions

Rohling

Hibbert

Williams

et al. 2017

Quaternary Science Reviews

100

115

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Arctic ice shelf Last Interglacial Glacioisostatic adjustment a b s t r a c t Studies of past glacial cycles yield critical information about climate and sea-level (ice-volume) variability, including the sensitivity of climate to radiative change, and impacts of crustal rebound on sealevel reconstructions for past interglacials. Here we identify significant differences between the last and penultimate glacial maxima (LGM and PGM) in terms of global volume and distribution of land ice, despite similar temperatures and radiative forcing. Our analysis challenges conventional views of relationships between global ice volume, sea level, seawater oxygen isotope values, and deep-sea temperature, and supports the potential presence of large floating Arctic ice shelves during the PGM. The existence of different glacial 'modes' calls for focussed research on the complex processes behind ice-age development. We present a glacioisostatic assessment to demonstrate how a different PGM ice-sheet configuration might affect sea-level estimates for the last interglacial. Results suggest that this may alter existing last interglacial sea-level estimates, which often use an LGM-like ice configuration, by several metres (likely upward).

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Oxygen isotopes and sea level

Cited by 1,553 publications

References 34 publications

High-Frequency Sequences in the Quaternary of Pelotas Basin (coastal plain): a record of degradational stacking as a function of longer-term base-level fall

High-Frequency Sequences in the Quaternary of Pelotas Basin (coastal plain): a record of degradational stacking as a function of longer-term base-level fall

Coastal tectonics on the eastern margin of the Pacific Rim: late Quaternary sea-level history and uplift rates, Channel Islands National Park, California, USA

Differences between the last two glacial maxima and implications for ice-sheet, δ18O, and sea-level reconstructions

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