Rapid coupling between solid earth and ice volume during the Quaternary

Abstract The solid earth plays a major role in controlling Earth’s surface climate. Volcanic degassing of carbon dioxide (CO2) and silicate chemical weathering are known to regulate the evolution of climate on a geologic timescale (> 106 yr), but the relationship between the solid earth and the s...

Descripción completa

Guardado en:

Detalles Bibliográficos
Autores principales:	Yusuke Kuwahara, Kazutaka Yasukawa, Koichiro Fujinaga, Tatsuo Nozaki, Junichiro Ohta, Honami Sato, Jun-Ichi Kimura, Kentaro Nakamura, Yusuke Yokoyama, Yasuhiro Kato
Formato:	article
Lenguaje:	EN
Publicado:	Nature Portfolio 2021
Materias:	Medicine R Science Q
Acceso en línea:	https://doaj.org/article/e354a32434f541078ffc226263197e01
Etiquetas:	Agregar Etiqueta Sin Etiquetas, Sea el primero en etiquetar este registro!

id	oai:doaj.org-article:e354a32434f541078ffc226263197e01
record_format	dspace
spelling	oai:doaj.org-article:e354a32434f541078ffc226263197e012021-12-02T11:37:22ZRapid coupling between solid earth and ice volume during the Quaternary10.1038/s41598-021-84448-72045-2322https://doaj.org/article/e354a32434f541078ffc226263197e012021-03-01T00:00:00Zhttps://doi.org/10.1038/s41598-021-84448-7https://doaj.org/toc/2045-2322Abstract The solid earth plays a major role in controlling Earth’s surface climate. Volcanic degassing of carbon dioxide (CO2) and silicate chemical weathering are known to regulate the evolution of climate on a geologic timescale (> 106 yr), but the relationship between the solid earth and the shorter (< 105 yr) fluctuations of Quaternary glacial–interglacial cycles is still under debate. Here we show that the seawater osmium isotope composition (187Os/188Os), a proxy for the solid earth’s response to climate change, has varied during the past 300,000 years in association with glacial–interglacial cycles. Our marine Os isotope mass-balance simulation reveals that the observed 187Os/188Os fluctuation cannot be explained solely by global chemical weathering rate changes corresponding to glacial–interglacial climate changes, but the fluctuation can be reproduced by taking account of short-term inputs of (1) radiogenic Os derived from intense weathering of glacial till during deglacial periods and (2) unradiogenic Os derived from enhanced seafloor hydrothermalism triggered by sea-level falls associated with increases of ice sheet volume. Our results constitute the first evidence that ice sheet recession and expansion during the Quaternary systematically and repetitively caused short-term (< 105 yr) solid earth responses via chemical weathering of glacial till and seafloor magmatism. This finding implies that climatic changes on < 105 yr timescales can provoke rapid feedbacks from the solid earth, a causal relationship that is the reverse of the longer-term (> 106 yr) causality that has been conventionally considered.Yusuke KuwaharaKazutaka YasukawaKoichiro FujinagaTatsuo NozakiJunichiro OhtaHonami SatoJun-Ichi KimuraKentaro NakamuraYusuke YokoyamaYasuhiro KatoNature PortfolioarticleMedicineRScienceQENScientific Reports, Vol 11, Iss 1, Pp 1-14 (2021)
institution	DOAJ
collection	DOAJ
language	EN
topic	Medicine R Science Q
spellingShingle	Medicine R Science Q Yusuke Kuwahara Kazutaka Yasukawa Koichiro Fujinaga Tatsuo Nozaki Junichiro Ohta Honami Sato Jun-Ichi Kimura Kentaro Nakamura Yusuke Yokoyama Yasuhiro Kato Rapid coupling between solid earth and ice volume during the Quaternary
description	Abstract The solid earth plays a major role in controlling Earth’s surface climate. Volcanic degassing of carbon dioxide (CO2) and silicate chemical weathering are known to regulate the evolution of climate on a geologic timescale (> 106 yr), but the relationship between the solid earth and the shorter (< 105 yr) fluctuations of Quaternary glacial–interglacial cycles is still under debate. Here we show that the seawater osmium isotope composition (187Os/188Os), a proxy for the solid earth’s response to climate change, has varied during the past 300,000 years in association with glacial–interglacial cycles. Our marine Os isotope mass-balance simulation reveals that the observed 187Os/188Os fluctuation cannot be explained solely by global chemical weathering rate changes corresponding to glacial–interglacial climate changes, but the fluctuation can be reproduced by taking account of short-term inputs of (1) radiogenic Os derived from intense weathering of glacial till during deglacial periods and (2) unradiogenic Os derived from enhanced seafloor hydrothermalism triggered by sea-level falls associated with increases of ice sheet volume. Our results constitute the first evidence that ice sheet recession and expansion during the Quaternary systematically and repetitively caused short-term (< 105 yr) solid earth responses via chemical weathering of glacial till and seafloor magmatism. This finding implies that climatic changes on < 105 yr timescales can provoke rapid feedbacks from the solid earth, a causal relationship that is the reverse of the longer-term (> 106 yr) causality that has been conventionally considered.
format	article
author	Yusuke Kuwahara Kazutaka Yasukawa Koichiro Fujinaga Tatsuo Nozaki Junichiro Ohta Honami Sato Jun-Ichi Kimura Kentaro Nakamura Yusuke Yokoyama Yasuhiro Kato
author_facet	Yusuke Kuwahara Kazutaka Yasukawa Koichiro Fujinaga Tatsuo Nozaki Junichiro Ohta Honami Sato Jun-Ichi Kimura Kentaro Nakamura Yusuke Yokoyama Yasuhiro Kato
author_sort	Yusuke Kuwahara
title	Rapid coupling between solid earth and ice volume during the Quaternary
title_short	Rapid coupling between solid earth and ice volume during the Quaternary
title_full	Rapid coupling between solid earth and ice volume during the Quaternary
title_fullStr	Rapid coupling between solid earth and ice volume during the Quaternary
title_full_unstemmed	Rapid coupling between solid earth and ice volume during the Quaternary
title_sort	rapid coupling between solid earth and ice volume during the quaternary
publisher	Nature Portfolio
publishDate	2021
url	https://doaj.org/article/e354a32434f541078ffc226263197e01
work_keys_str_mv	AT yusukekuwahara rapidcouplingbetweensolidearthandicevolumeduringthequaternary AT kazutakayasukawa rapidcouplingbetweensolidearthandicevolumeduringthequaternary AT koichirofujinaga rapidcouplingbetweensolidearthandicevolumeduringthequaternary AT tatsuonozaki rapidcouplingbetweensolidearthandicevolumeduringthequaternary AT junichiroohta rapidcouplingbetweensolidearthandicevolumeduringthequaternary AT honamisato rapidcouplingbetweensolidearthandicevolumeduringthequaternary AT junichikimura rapidcouplingbetweensolidearthandicevolumeduringthequaternary AT kentaronakamura rapidcouplingbetweensolidearthandicevolumeduringthequaternary AT yusukeyokoyama rapidcouplingbetweensolidearthandicevolumeduringthequaternary AT yasuhirokato rapidcouplingbetweensolidearthandicevolumeduringthequaternary
_version_	1718395794464178176

Rapid coupling between solid earth and ice volume during the Quaternary

Ejemplares similares