Successive reef depositional events along the Marquesas foreslopes (French Polynesia) since 26 ka

Cabioch, Guy; Montaggioni, Lucien F.; Frank, Norbert; Séard, Claire; Sallé, Eline; Payri, Claude; Pelletier, Bernard; Paterne, Martine

doi:10.1016/j.margeo.2008.04.014

Cited by 57 publications

(27 citation statements)

References 57 publications

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“…The previously published δ 11 B data for corals includes a Gaillardet and Allègre, 1995;b Hemming et al, 1998; Pelejero et al, 2005. The 230 Th/U ages of the corals from Tahiti and Marquesas are from Bard et al (1996), Cabioch et al (2008), Paterne et al (2004).…”

Section: Boron Isotope Measurementsmentioning

confidence: 99%

“…According to modern observations (http://www.nodc.noaa.gov) (Henin, 1999), the Marquesas area has a mean annual SST of 28±1 • C. The ancient Porites samples studied here were collected from submerged reefs off the Marquesas and Tahiti Islands in the Equatorial Pacific. Coral ages, which span from 20.72±0.20 kyr BP to 0.25±0.03 kyr BP, were obtained by mass spectrometric U-Th dating (Paterne et al, 2004;Cabioch et al, 2008).…”

Section: Geographical Setting and Regional Modern Sstmentioning

confidence: 99%

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Abrupt sea surface pH change at the end of the Younger Dryas in the central sub-equatorial Pacific inferred from boron isotope abundance in corals (<i>Porites</i>)

et al. 2010

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Abstract. The "δ 11 B-pH" technique was applied to modern and ancient corals Porites from the sub-equatorial Pacific areas (Tahiti and Marquesas) spanning a time interval from 0 to 20.720 calendar years to determine the amplitude of pH changes between the Last Glacial Period and the Holocene. Boron isotopes were measured by MultiCollector -Inductively Coupled Plasma Mass Spectrometry (MC-ICPMS) with an external reproducibility of 0.25‰, allowing a precision of about ±0.03 pH-units for pH values between 8 and 8.3. The boron concentration [B] and isotopic composition of modern samples indicate that the temperature strongly controls the partition coefficient K D for different aragonite species. Modern coral δ 11 B values and the reconstructed sea surface pH values for different Pacific areas match the measured pH expressed on the seawater scale and confirm the calculation parameters that were previously determined by laboratory calibration exercises. Most ancient sea surface pH reconstructions near Marquesas are higher than modern values. These values range between 8.19 and 8.27 for the Holocene and reached 8.30 at the end of the last glacial period (20.7 kyr BP). At the end of the Younger Dryas (11.50±0.1 kyr BP), the central sub-equatorial Pacific experienced a dramatic drop of up to 0.2 pH-units from the average pH of 8.2 before and after this short event. Using the marine carbonate algorithms, we recalculated the aqueous pCO 2 to be 440±25 ppmV at around 11.5 kyr BP for corals at Marquesas and ∼500 ppmV near Tahiti where it Correspondence to: E. Douville (eric.douville@lsce.ipsl.fr) was assumed that pCO 2 in the atmosphere was 250 ppmV. Throughout the Holocene, the difference in pCO 2 between the ocean and the atmosphere at Marquesas ( pCO 2 ) indicates that the surface waters behave as a moderate CO 2 sink or source (−53 to 20 ppmV) during El Niño-like conditions. By contrast, during the last glacial/interglacial transition, this area was a marked source of CO 2 (21 to 92 ppmV) for the atmosphere, highlighting predominant La Niña-like conditions. Such conditions were particularly pronounced at the end of the Younger Dryas with a large amount of CO 2 released with pCO 2 of +185±25 ppmV. This last finding provides further evidence of the marked changes in the surface water pH and temperature in the equatorial Pacific at the Younger Dryas-Holocene transition and the strong impact of oceanic dynamic on the atmospheric CO 2 content.

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Section: Boron Isotope Measurementsmentioning

confidence: 99%

Section: Geographical Setting and Regional Modern Sstmentioning

confidence: 99%

Abrupt sea surface pH change at the end of the Younger Dryas in the central sub-equatorial Pacific inferred from boron isotope abundance in corals (<i>Porites</i>)

et al. 2010

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“…The Last Glacial Maximum (LGM) lasted about 6 kyr, probably from around 26 ka ago (Peltier and Fairbanks, 2006;Cabioch et al 2008), although Lambeck et al (2002) defined the A C C E P T E D M A N U S C R I P T…”

Section: Observations In the Cookmentioning

confidence: 99%

Coral-reef records of Quaternary changes in climate and sea-level

Braithwaite

2016

Earth-Science Reviews

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“…Paleo-barrier reefs were discovered in 1997 at 80-90 m depth. They drowned during rapid sea-level rise (Melt Water Pulse 1-A circa 15,000 yrs ago), with which they did not keep up (Cabioch et al 2008). Present Marquesas benthic assemblages between 0 and 30 m are largely dominated by Porites lobata colonies (Chevalier 1978).…”

mentioning

confidence: 99%

A monospecific Millepora reef in Marquesas Islands, French Polynesia

2014

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Successive reef depositional events along the Marquesas foreslopes (French Polynesia) since 26 ka

Cited by 57 publications

References 57 publications

Abrupt sea surface pH change at the end of the Younger Dryas in the central sub-equatorial Pacific inferred from boron isotope abundance in corals (<i>Porites</i>)

Abrupt sea surface pH change at the end of the Younger Dryas in the central sub-equatorial Pacific inferred from boron isotope abundance in corals (<i>Porites</i>)

Coral-reef records of Quaternary changes in climate and sea-level

A monospecific Millepora reef in Marquesas Islands, French Polynesia

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Successive reef depositional events along the Marquesas foreslopes (French Polynesia) since 26 ka

Cited by 57 publications

References 57 publications

Abrupt sea surface pH change at the end of the Younger Dryas in the central sub-equatorial Pacific inferred from boron isotope abundance in corals (&lt;i&gt;Porites&lt;/i&gt;)

Abrupt sea surface pH change at the end of the Younger Dryas in the central sub-equatorial Pacific inferred from boron isotope abundance in corals (&lt;i&gt;Porites&lt;/i&gt;)

Coral-reef records of Quaternary changes in climate and sea-level

A monospecific Millepora reef in Marquesas Islands, French Polynesia

Contact Info

Product

Resources

About

Abrupt sea surface pH change at the end of the Younger Dryas in the central sub-equatorial Pacific inferred from boron isotope abundance in corals (<i>Porites</i>)

Abrupt sea surface pH change at the end of the Younger Dryas in the central sub-equatorial Pacific inferred from boron isotope abundance in corals (<i>Porites</i>)