A highly resolved record of relative sea level in the western Mediterranean Sea during the last interglacial period
- Permanent Link:
- A highly resolved record of relative sea level in the western Mediterranean Sea during the last interglacial period
- Series Title:
- Nature Geoscience
- Polyak, Victor J.
Onac, Bogdan P.
Fornós, Joan J.
Dorale, Jeffrey A.
- Publication Date:
- Subjects / Keywords:
- Mediterranean, Interglacial Period, ( local )
- serial ( sobekcm )
- 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 6â€“9â€‰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 2.15â€‰±â€‰0.75â€‰m above present levels between 126,600â€‰±â€‰400 and 116,000â€‰±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 122,000â€‰years ago, until the highstand termination 116,000â€‰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).
- Source Institution:
- University of South Florida Library
- Holding Location:
- University of South Florida
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- This object is protected by copyright, and is made available here for research and educational purposes. Permission to reuse, publish, or reproduce the object beyond the bounds of Fair Use or other exemptions to copyright law must be obtained from the copyright holder.
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