High interstadial sea levels over the past 420ka from the Huon Peninsula, Papua New Guinea
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 are scarce prior to the last glacial cycle (>130 thousand...
Published in: | Communications Earth & Environment |
---|---|
Main Authors: | , , , , , , , |
Format: | Article in Journal/Newspaper |
Language: | English |
Published: |
2022
|
Subjects: | |
Online Access: | https://gfzpublic.gfz-potsdam.de/pubman/item/item_5014512 https://gfzpublic.gfz-potsdam.de/pubman/item/item_5014512_1/component/file_5014641/5014512.pdf |
id |
ftgfzpotsdam:oai:gfzpublic.gfz-potsdam.de:item_5014512 |
---|---|
record_format |
openpolar |
spelling |
ftgfzpotsdam:oai:gfzpublic.gfz-potsdam.de:item_5014512 2023-05-15T16:40:54+02:00 High interstadial sea levels over the past 420ka from the Huon Peninsula, Papua New Guinea de Gelder, G. Husson, L. Anne-Morwenn, P. Fernández-Blanco, D. Pico, T. Chauveau, D. Authemayou, C. Pedoja, K. 2022 application/pdf https://gfzpublic.gfz-potsdam.de/pubman/item/item_5014512 https://gfzpublic.gfz-potsdam.de/pubman/item/item_5014512_1/component/file_5014641/5014512.pdf eng eng info:eu-repo/semantics/altIdentifier/doi/10.1038/s43247-022-00583-7 https://gfzpublic.gfz-potsdam.de/pubman/item/item_5014512 https://gfzpublic.gfz-potsdam.de/pubman/item/item_5014512_1/component/file_5014641/5014512.pdf info:eu-repo/semantics/openAccess https://creativecommons.org/licenses/by/4.0/ CC-BY Communications Earth & Environment info:eu-repo/semantics/article 2022 ftgfzpotsdam https://doi.org/10.1038/s43247-022-00583-7 2023-01-09T00:32:41Z 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 are scarce prior to the last glacial cycle (>130 thousand years ago). Here we show that the coral reef terrace sequence at the Huon Peninsula (Papua New Guinea) provides such constraints up to ∼420 thousand years ago, through a geometric analysis of high-resolution topographic data. We derive a northward tectonic tilt as regional deformation pattern, and estimate relative sea level for 31 Quaternary periods, including several periods for which no relative sea level data exists elsewhere. Supported by numerical reef models, these estimates suggest that oxygen isotope-based global mean sea-level curves systematically underestimate interstadial sea-level elevations, by up to ∼20 m. Compared to those curves, our results imply a stronger degree of non-linearity between ice-sheet volumes and global temperatures within Quaternary glacial cycles. Article in Journal/Newspaper Ice Sheet GFZpublic (German Research Centre for Geosciences, Helmholtz-Zentrum Potsdam) Huon ENVELOPE(-57.998,-57.998,-63.367,-63.367) Communications Earth & Environment 3 1 |
institution |
Open Polar |
collection |
GFZpublic (German Research Centre for Geosciences, Helmholtz-Zentrum Potsdam) |
op_collection_id |
ftgfzpotsdam |
language |
English |
description |
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 are scarce prior to the last glacial cycle (>130 thousand years ago). Here we show that the coral reef terrace sequence at the Huon Peninsula (Papua New Guinea) provides such constraints up to ∼420 thousand years ago, through a geometric analysis of high-resolution topographic data. We derive a northward tectonic tilt as regional deformation pattern, and estimate relative sea level for 31 Quaternary periods, including several periods for which no relative sea level data exists elsewhere. Supported by numerical reef models, these estimates suggest that oxygen isotope-based global mean sea-level curves systematically underestimate interstadial sea-level elevations, by up to ∼20 m. Compared to those curves, our results imply a stronger degree of non-linearity between ice-sheet volumes and global temperatures within Quaternary glacial cycles. |
format |
Article in Journal/Newspaper |
author |
de Gelder, G. Husson, L. Anne-Morwenn, P. Fernández-Blanco, D. Pico, T. Chauveau, D. Authemayou, C. Pedoja, K. |
spellingShingle |
de Gelder, G. Husson, L. Anne-Morwenn, P. Fernández-Blanco, D. Pico, T. Chauveau, D. Authemayou, C. Pedoja, K. High interstadial sea levels over the past 420ka from the Huon Peninsula, Papua New Guinea |
author_facet |
de Gelder, G. Husson, L. Anne-Morwenn, P. Fernández-Blanco, D. Pico, T. Chauveau, D. Authemayou, C. Pedoja, K. |
author_sort |
de Gelder, G. |
title |
High interstadial sea levels over the past 420ka from the Huon Peninsula, Papua New Guinea |
title_short |
High interstadial sea levels over the past 420ka from the Huon Peninsula, Papua New Guinea |
title_full |
High interstadial sea levels over the past 420ka from the Huon Peninsula, Papua New Guinea |
title_fullStr |
High interstadial sea levels over the past 420ka from the Huon Peninsula, Papua New Guinea |
title_full_unstemmed |
High interstadial sea levels over the past 420ka from the Huon Peninsula, Papua New Guinea |
title_sort |
high interstadial sea levels over the past 420ka from the huon peninsula, papua new guinea |
publishDate |
2022 |
url |
https://gfzpublic.gfz-potsdam.de/pubman/item/item_5014512 https://gfzpublic.gfz-potsdam.de/pubman/item/item_5014512_1/component/file_5014641/5014512.pdf |
long_lat |
ENVELOPE(-57.998,-57.998,-63.367,-63.367) |
geographic |
Huon |
geographic_facet |
Huon |
genre |
Ice Sheet |
genre_facet |
Ice Sheet |
op_source |
Communications Earth & Environment |
op_relation |
info:eu-repo/semantics/altIdentifier/doi/10.1038/s43247-022-00583-7 https://gfzpublic.gfz-potsdam.de/pubman/item/item_5014512 https://gfzpublic.gfz-potsdam.de/pubman/item/item_5014512_1/component/file_5014641/5014512.pdf |
op_rights |
info:eu-repo/semantics/openAccess https://creativecommons.org/licenses/by/4.0/ |
op_rightsnorm |
CC-BY |
op_doi |
https://doi.org/10.1038/s43247-022-00583-7 |
container_title |
Communications Earth & Environment |
container_volume |
3 |
container_issue |
1 |
_version_ |
1766031331854123008 |