High interstadial sea levels over the past 420ka from the Huon Peninsula, Papua New Guinea

نویسندگان

چکیده

Abstract The history of sea level across the Quaternary is essential for assessing past and future climate. Global sea-level reconstructions are typically derived from oxygen isotope curves, but require calibration with geological constraints that scarce prior to last glacial cycle (>130 thousand years ago). Here we show coral reef terrace sequence at Huon Peninsula (Papua New Guinea) provides such up ∼420 ago, through a geometric analysis high-resolution topographic data. We derive northward tectonic tilt as regional deformation pattern, estimate relative 31 periods, including several periods which no data exists elsewhere. Supported by numerical models, these estimates suggest isotope-based global mean curves systematically underestimate interstadial elevations, ∼20 m. Compared those our results imply stronger degree non-linearity between ice-sheet volumes temperatures within cycles.

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ژورنال

عنوان ژورنال: Communications earth & environment

سال: 2022

ISSN: ['2662-4435']

DOI: https://doi.org/10.1038/s43247-022-00583-7