A sea-level plateau preceding the Marine Isotope Stage 2 minima revealed by Australian sediments

Takeshige Ishiwa, Yusuke Yokoyama, Junichi Okuno, Stephen Obrochta, Katsuto Uehara, Minoru Ikehara, Yosuke Miyairi

研究成果: ジャーナルへの寄稿記事

抄録

Further understanding of past climate requires a robust estimate of global ice volume fluctuations that in turn rely on accurate global sea-level reconstructions. An advantage of Marine Isotope Stage 2 (MIS 2) is the availability of suitable material for radiocarbon dating to allow comparison of sea-level data with other paleoclimatic proxies. However, the number and accuracy of sea-level records during MIS 2 is currently lacking. Here we present the history of MIS 2 eustatic sea-level change as recorded in the Bonaparte Gulf, northwestern Australia by reconstructing relative sea level and then modeling glacial isostatic adjustment. The isostatically-corrected global sea-level history indicates that sea-level plateaued from 25.9 to 20.4 cal kyr BP (modeled median probability) prior reaching its minimum (19.7 to 19.1 cal kyr BP). Following the plateau, we detect a 10-m global sea-level fall over ~1,000 years and a short duration of the Last Glacial Maximum (global sea-level minimum; 19.7 to 19.1 cal kyr BP). These large changes in ice volume over such a short time indicates that the continental ice sheets never reached their isostatic equilibrium during the Last Glacial Maximum.

元の言語英語
記事番号6449
ジャーナルScientific reports
9
発行部数1
DOI
出版物ステータス出版済み - 12 1 2019

Fingerprint

Oceans and Seas
Isotopes
Ice
Radiometric Dating
History
Ice Cover
Proxy
Climate

All Science Journal Classification (ASJC) codes

  • General

これを引用

A sea-level plateau preceding the Marine Isotope Stage 2 minima revealed by Australian sediments. / Ishiwa, Takeshige; Yokoyama, Yusuke; Okuno, Junichi; Obrochta, Stephen; Uehara, Katsuto; Ikehara, Minoru; Miyairi, Yosuke.

:: Scientific reports, 巻 9, 番号 1, 6449, 01.12.2019.

研究成果: ジャーナルへの寄稿記事

Ishiwa, Takeshige ; Yokoyama, Yusuke ; Okuno, Junichi ; Obrochta, Stephen ; Uehara, Katsuto ; Ikehara, Minoru ; Miyairi, Yosuke. / A sea-level plateau preceding the Marine Isotope Stage 2 minima revealed by Australian sediments. :: Scientific reports. 2019 ; 巻 9, 番号 1.
@article{3013c5cebe864e199860302ee1c5ba2e,
title = "A sea-level plateau preceding the Marine Isotope Stage 2 minima revealed by Australian sediments",
abstract = "Further understanding of past climate requires a robust estimate of global ice volume fluctuations that in turn rely on accurate global sea-level reconstructions. An advantage of Marine Isotope Stage 2 (MIS 2) is the availability of suitable material for radiocarbon dating to allow comparison of sea-level data with other paleoclimatic proxies. However, the number and accuracy of sea-level records during MIS 2 is currently lacking. Here we present the history of MIS 2 eustatic sea-level change as recorded in the Bonaparte Gulf, northwestern Australia by reconstructing relative sea level and then modeling glacial isostatic adjustment. The isostatically-corrected global sea-level history indicates that sea-level plateaued from 25.9 to 20.4 cal kyr BP (modeled median probability) prior reaching its minimum (19.7 to 19.1 cal kyr BP). Following the plateau, we detect a 10-m global sea-level fall over ~1,000 years and a short duration of the Last Glacial Maximum (global sea-level minimum; 19.7 to 19.1 cal kyr BP). These large changes in ice volume over such a short time indicates that the continental ice sheets never reached their isostatic equilibrium during the Last Glacial Maximum.",
author = "Takeshige Ishiwa and Yusuke Yokoyama and Junichi Okuno and Stephen Obrochta and Katsuto Uehara and Minoru Ikehara and Yosuke Miyairi",
year = "2019",
month = "12",
day = "1",
doi = "10.1038/s41598-019-42573-4",
language = "English",
volume = "9",
journal = "Scientific Reports",
issn = "2045-2322",
publisher = "Nature Publishing Group",
number = "1",

}

TY - JOUR

T1 - A sea-level plateau preceding the Marine Isotope Stage 2 minima revealed by Australian sediments

AU - Ishiwa, Takeshige

AU - Yokoyama, Yusuke

AU - Okuno, Junichi

AU - Obrochta, Stephen

AU - Uehara, Katsuto

AU - Ikehara, Minoru

AU - Miyairi, Yosuke

PY - 2019/12/1

Y1 - 2019/12/1

N2 - Further understanding of past climate requires a robust estimate of global ice volume fluctuations that in turn rely on accurate global sea-level reconstructions. An advantage of Marine Isotope Stage 2 (MIS 2) is the availability of suitable material for radiocarbon dating to allow comparison of sea-level data with other paleoclimatic proxies. However, the number and accuracy of sea-level records during MIS 2 is currently lacking. Here we present the history of MIS 2 eustatic sea-level change as recorded in the Bonaparte Gulf, northwestern Australia by reconstructing relative sea level and then modeling glacial isostatic adjustment. The isostatically-corrected global sea-level history indicates that sea-level plateaued from 25.9 to 20.4 cal kyr BP (modeled median probability) prior reaching its minimum (19.7 to 19.1 cal kyr BP). Following the plateau, we detect a 10-m global sea-level fall over ~1,000 years and a short duration of the Last Glacial Maximum (global sea-level minimum; 19.7 to 19.1 cal kyr BP). These large changes in ice volume over such a short time indicates that the continental ice sheets never reached their isostatic equilibrium during the Last Glacial Maximum.

AB - Further understanding of past climate requires a robust estimate of global ice volume fluctuations that in turn rely on accurate global sea-level reconstructions. An advantage of Marine Isotope Stage 2 (MIS 2) is the availability of suitable material for radiocarbon dating to allow comparison of sea-level data with other paleoclimatic proxies. However, the number and accuracy of sea-level records during MIS 2 is currently lacking. Here we present the history of MIS 2 eustatic sea-level change as recorded in the Bonaparte Gulf, northwestern Australia by reconstructing relative sea level and then modeling glacial isostatic adjustment. The isostatically-corrected global sea-level history indicates that sea-level plateaued from 25.9 to 20.4 cal kyr BP (modeled median probability) prior reaching its minimum (19.7 to 19.1 cal kyr BP). Following the plateau, we detect a 10-m global sea-level fall over ~1,000 years and a short duration of the Last Glacial Maximum (global sea-level minimum; 19.7 to 19.1 cal kyr BP). These large changes in ice volume over such a short time indicates that the continental ice sheets never reached their isostatic equilibrium during the Last Glacial Maximum.

UR - http://www.scopus.com/inward/record.url?scp=85065586222&partnerID=8YFLogxK

UR - http://www.scopus.com/inward/citedby.url?scp=85065586222&partnerID=8YFLogxK

U2 - 10.1038/s41598-019-42573-4

DO - 10.1038/s41598-019-42573-4

M3 - Article

C2 - 31073129

AN - SCOPUS:85065586222

VL - 9

JO - Scientific Reports

JF - Scientific Reports

SN - 2045-2322

IS - 1

M1 - 6449

ER -