Deglacial sea-level record from Tahiti corals and the timing of global meltwater discharge

Bard, Édouard; Hamelin, Bruno; Arnold, Maurice; Montaggioni, Lucien F.; Cabioch, Guy; Faure, G.; Rougerie, Francis

doi:10.1038/382241a0

Cited by 1,000 publications

(721 citation statements)

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“…During the subsequent phase of rapid LIS retreat 9-8.5 kyr BP, the LIS contributed 6.6±0.8 m of sea level rise at ~1.3 cm yr -1 . This rate is comparable to geologic evidence for global sea level rise for this interval derived from coral records 16,17 (Fig 1d). Estuarine records from NGS-2008-04-00345A 6 Chesapeake Bay 18 also indicate a marsh drowning event ~8.9 kyr BP not explained by isostasy with sea level rising at ≥1.2 cm yr -1 , similar to our estimated rate of sea level rise from the LIS.…”

Section: Laurentide Ice Sheet Contributions To Sea Level Risesupporting

confidence: 60%

“…From 11 to 6 kyr BP, sea level rose at an average rate of ~1 cm yr -1 largely reflecting melting of the LIS and Antarctic Ice Sheet, with higher rates during the early Holocene than mid Holocene [15][16][17] (Fig. 1e).…”

Section: Laurentide Ice Sheet Contributions To Sea Level Risementioning

confidence: 99%

“…However, portions of the northern and eastern North Atlantic were colder than present [10][11][12] , possibly as a consequence of the suppression of Labrador Sea deep water production by LIS meltwater 13,14 . The gradual rise in sea level during the early Holocene [15][16][17] was punctuated by at least two increases in the rate of sea level rise, which were sourced from either the LIS or Antarctic Ice Sheet, indicating variations in the rate of ice sheet melting 14,18,19 . The early Holocene LIS thus represents the most recent disappearance of a mid-to high-latitude terrestrial ice sheet, and can provide constraints on how fast NGS-2008-04-00345A 3 terrestrial ice sheets can melt and raise sea level under a climate warmer than present.…”

mentioning

confidence: 99%

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Rapid early Holocene deglaciation of the Laurentide ice sheet

et al. 2008

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Section: Laurentide Ice Sheet Contributions To Sea Level Risesupporting

confidence: 60%

Section: Laurentide Ice Sheet Contributions To Sea Level Risementioning

confidence: 99%

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confidence: 99%

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Rapid early Holocene deglaciation of the Laurentide ice sheet

et al. 2008

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“…Later, more precise and accurate thermal ionization mass spectrometry (TIMS) confirmed this result in a variety of locations (Edwards et al, 1987a,b;Gallup et al, 1994;Muhs et al, 1994;Stirling et al, 1995;Szabo et al, 1994). Drill cores of submerged corals that have been precisely dated by 230 Th methods contain our most detailed and continuous record of sea-level since the last glacial maximum (Bard et al, 1993;Bard et al, 1996;Edwards et al, 1993). Coupled high precision radiocarbon and uranium series dates from surface corals constrain the history of atmospheric ⌬ 14 C beyond the tree ring calibration (Bard et al, 1993;Bard et al, 1990;Edwards et al, 1993).…”

Section: Introductionmentioning

confidence: 73%

U-Th dating of deep-sea corals

Cheng

Adkins

Edwards

et al. 2000

Geochimica et Cosmochimica Acta

214

162

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Abstract- 230 Th, 232 Th, 234 U and 238 U compositions of several deep-sea solitary corals, mainly the species Desmophyllum cristagalli, were determined by thermal ionization mass spectrometry (TIMS). It is possible to obtain high precision ages on modern pristine corals that have low [ 232 Th] (5 to a few hundred ppt). However, because older deep-sea corals tend to have higher [ 232 Th] compared to surface corals, and the initial 230 Th/ 232 Th ratio is uncertain, older deep-sea corals have larger age uncertainties (Ϯseveral hundred years for samples with a few thousand ppt 232 Th). Therefore, the key hurdle for precise U-Th dating is to remove or account for contaminants which contain elevated 232 Th and associated 230 Th not due to closed system decay within the coral lattice. A modification of the trace metal cleaning methods used for foraminifera and surface corals can significantly reduce this contamination. By counting the visible growth bands and measuring the mean age of a single septum, the extension rate of D. cristagalli was estimated to be between 0.1 and 3.1 mm/year. In a mean sense, bands appear to be precipitated annually, but this estimate has a large uncertainty. If appropriate tracer calibrations can be established, these corals are therefore suitable to record decadal or sub-decadal oceanographic changes over the course of their lifetime. The ␦ 234 U values of all modern samples from different localities and different depths are similar (mean 145.5 Ϯ 2.3‰) and indistinguishable from the data obtained from surface corals. At a precision of about Ϯ2‰, we find no structure in the oceanic profile of ␦ 234 U ratios over the top 2000 m of the water column.

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“…Nakada and Lambeck 1989;Fleming et al 1998;Lambeck 2002;Milne et al 2002;Peltier 2002) and can be employed to constrain the source geometry of major meltwater pulses (Clark et al 2002;Bassett et al 2005). The use of coral reconstructions (Fairbanks 1989;Chappell and Polach 1991;Bard et al 1996) has proved extremely useful for reconstructions prior to the Holocene but the large error ranges (±2.5m , Fairbanks 1989;±5m Blanchon 2005) limit their use for Holocene reconstructions where the error is often greater than the magnitude of the change being investigated.…”

Section: Introductionmentioning

confidence: 99%

Mangrove pollen of Indonesia and its suitability as a sea-level indicator

et al. 2007

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The full-text may be used and/or reproduced, and given to third parties in any format or medium, without prior permission or charge, for personal research or study, educational, or not-for-pro t purposes provided that:• a full bibliographic reference is made to the original source• a link is made to the metadata record in Durham E-Theses• the full-text is not changed in any way The full-text must not be sold in any format or medium without the formal permission of the copyright holders. Mangrove Pollen of Indonesia and its Suitability as a Sea-Level IndicatorThe copyright of this thesis rests with the author or the university to which it was submitted. No quotation from it, or information derived from it may be published without the prior written consent of the author or university, and any information derived from it should be acknowledged. Simon Edward EngelhartThesis The copyright of this thesis rests with the author. No quotations from it should be published without his prior written consent and information derived from it should be acknowledged.11 AcknowledgemeBlts I would like to thank all those people who have helped in the production of this thesis.

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Deglacial sea-level record from Tahiti corals and the timing of global meltwater discharge

Cited by 1,000 publications

References 30 publications

Rapid early Holocene deglaciation of the Laurentide ice sheet

Rapid early Holocene deglaciation of the Laurentide ice sheet

U-Th dating of deep-sea corals

Mangrove pollen of Indonesia and its suitability as a sea-level indicator

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