AustralieFrV1, Istex, Checkpoint, bibRecord, 000144

ENSO reconstructions over the past 60 ka using giant clams (Tridacna sp.) from Papua New Guinea

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ENSO reconstructions over the past 60 ka using giant clams (Tridacna sp.) from Papua New Guinea

Auteurs : Robin Driscoll [Royaume-Uni] ; Mary Elliot [France] ; Tom Russon [Royaume-Uni] ; Kevin Welsh [Australie] ; Yusuke Yokoyama [Japon] ; Alexander Tudhope [Royaume-Uni]

Source :

Geophysical Research Letters [ 0094-8276 ] ; 2014-10-16.

RBID : ISTEX:D65812A0E5EE7640266C3C8C67540D2255DE593F

Abstract

We present 12 seasonally resolved δ18O profiles of giant clams (Tridacna sp.) from the Huon Peninsula, Papua New Guinea, spanning discrete periods of time (9–38 years) over the past 60 ka. The interannual anomaly time series of these shells are used to reconstruct interannual variability which can predominantly be attributed in the modern climate to the El Niño–Southern Oscillation (ENSO) in this region. We have found a significant reduction in interannual δ18O variance during the early Holocene, whereas during Marine Isotope Stage 3 there were at least some periods with variance not significantly different to the twentieth century. We show that ENSO variability seen during the late twentieth century is rare but not unprecedented within glacial climates.

Url:

https://api.istex.fr/document/D65812A0E5EE7640266C3C8C67540D2255DE593F/fulltext/pdf

DOI: 10.1002/2014GL061446

Affiliations:

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Le document en format XML

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<front><div type="abstract">We present 12 seasonally resolved δ18O profiles of giant clams (Tridacna sp.) from the Huon Peninsula, Papua New Guinea, spanning discrete periods of time (9–38 years) over the past 60 ka. The interannual anomaly time series of these shells are used to reconstruct interannual variability which can predominantly be attributed in the modern climate to the El Niño–Southern Oscillation (ENSO) in this region. We have found a significant reduction in interannual δ18O variance during the early Holocene, whereas during Marine Isotope Stage 3 there were at least some periods with variance not significantly different to the twentieth century. We show that ENSO variability seen during the late twentieth century is rare but not unprecedented within glacial climates.</div>
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ENSO reconstructions over the past 60 ka using giant clams (Tridacna sp.) from Papua New Guinea

ENSO reconstructions over the past 60 ka using giant clams (Tridacna sp.) from Papua New Guinea

Source :

Abstract

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