A highly resolved record of relative sea level in the western Mediterranean Sea during the last interglacial period

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Material Information

Title:
A highly resolved record of relative sea level in the western Mediterranean Sea during the last interglacial period
Series Title:
Nature Geoscience
Creator:
Polyak, Victor J.
Onac, Bogdan P.
Fornós, Joan J.
Hay, Carling
Asmerom, Yemane
Dorale, Jeffrey A.
Ginés, Joaquín
Tuccimei, Paola
Ginés, Angel
Publication Date:
Language:
English

Subjects

Subjects / Keywords:
Mediterranean, Interglacial Period, ( local )
Genre:
serial ( sobekcm )

Notes

Abstract:
The magnitude and trajectory of sea-level change during marine isotope stage (MIS) 5e of the last interglacial period is uncertain. In general, sea level may have been 6–9 m above present sea level, with one or more oscillations of up to several metres superimposed. Here we present a well-dated relative sea-level record from the island of Mallorca in the western Mediterranean Sea for MIS-5e, based on the occurrence of phreatic overgrowths on speleothems forming near sea level. We find that relative sea-level in this region was within a range of 2.15 ±â€‰0.75 m above present levels between 126,600 ±â€‰400 and 116,000 ±â€‰800 years ago, although centennial-scale excursions cannot be excluded due to some gaps in the speleothem record. We corrected our relative sea-level record for glacio-isostatic adjustment using nine different glacial isostatic models. Together, these models suggest that ice-equivalent sea-level in Mallorca peaked at the start of MIS-5e then gradually decreased and stabilized by 122,000 years ago, until the highstand termination 116,000 years ago. Our sea-level record does not support the hypothesis of rapid sea-level fluctuations within MIS-5e. Instead, we suggest that melting of the polar ice sheets occurred early in the interglacial period, followed by gradual ice-sheet growth.
Original Version:
Nature Geoscience, Vol. 11 (2018-09-10).

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University of South Florida Library
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University of South Florida
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