Nonlinear climatic sensitivity to greenhouse gases over past 4 glacial/interglacial cycles

Abstract The paleoclimatic sensitivity to atmospheric greenhouse gases (GHGs) has recently been suggested to be nonlinear, however a GHG threshold value associated with deglaciation remains uncertain. Here, we combine a new sea surface temperature record spanning the last 360,000 years from the sout...

Descripción completa

Guardado en:

Detalles Bibliográficos
Autores principales:	Li Lo, Sheng-Pu Chang, Kuo-Yen Wei, Shih-Yu Lee, Tsong-Hua Ou, Yi-Chi Chen, Chih-Kai Chuang, Horng-Sheng Mii, George S. Burr, Min-Te Chen, Ying-Hung Tung, Meng-Chieh Tsai, David A. Hodell, Chuan-Chou Shen
Formato:	article
Lenguaje:	EN
Publicado:	Nature Portfolio 2017
Materias:	Medicine R Science Q
Acceso en línea:	https://doaj.org/article/0727251caf1140f89727092e73399c13
Etiquetas:	Agregar Etiqueta Sin Etiquetas, Sea el primero en etiquetar este registro!

id	oai:doaj.org-article:0727251caf1140f89727092e73399c13
record_format	dspace
spelling	oai:doaj.org-article:0727251caf1140f89727092e73399c132021-12-02T11:41:23ZNonlinear climatic sensitivity to greenhouse gases over past 4 glacial/interglacial cycles10.1038/s41598-017-04031-x2045-2322https://doaj.org/article/0727251caf1140f89727092e73399c132017-07-01T00:00:00Zhttps://doi.org/10.1038/s41598-017-04031-xhttps://doaj.org/toc/2045-2322Abstract The paleoclimatic sensitivity to atmospheric greenhouse gases (GHGs) has recently been suggested to be nonlinear, however a GHG threshold value associated with deglaciation remains uncertain. Here, we combine a new sea surface temperature record spanning the last 360,000 years from the southern Western Pacific Warm Pool with records from five previous studies in the equatorial Pacific to document the nonlinear relationship between climatic sensitivity and GHG levels over the past four glacial/interglacial cycles. The sensitivity of the responses to GHG concentrations rises dramatically by a factor of 2–4 at atmospheric CO2 levels of >220 ppm. Our results suggest that the equatorial Pacific acts as a nonlinear amplifier that allows global climate to transition from deglacial to full interglacial conditions once atmospheric CO2 levels reach threshold levels.Li LoSheng-Pu ChangKuo-Yen WeiShih-Yu LeeTsong-Hua OuYi-Chi ChenChih-Kai ChuangHorng-Sheng MiiGeorge S. BurrMin-Te ChenYing-Hung TungMeng-Chieh TsaiDavid A. HodellChuan-Chou ShenNature PortfolioarticleMedicineRScienceQENScientific Reports, Vol 7, Iss 1, Pp 1-7 (2017)
institution	DOAJ
collection	DOAJ
language	EN
topic	Medicine R Science Q
spellingShingle	Medicine R Science Q Li Lo Sheng-Pu Chang Kuo-Yen Wei Shih-Yu Lee Tsong-Hua Ou Yi-Chi Chen Chih-Kai Chuang Horng-Sheng Mii George S. Burr Min-Te Chen Ying-Hung Tung Meng-Chieh Tsai David A. Hodell Chuan-Chou Shen Nonlinear climatic sensitivity to greenhouse gases over past 4 glacial/interglacial cycles
description	Abstract The paleoclimatic sensitivity to atmospheric greenhouse gases (GHGs) has recently been suggested to be nonlinear, however a GHG threshold value associated with deglaciation remains uncertain. Here, we combine a new sea surface temperature record spanning the last 360,000 years from the southern Western Pacific Warm Pool with records from five previous studies in the equatorial Pacific to document the nonlinear relationship between climatic sensitivity and GHG levels over the past four glacial/interglacial cycles. The sensitivity of the responses to GHG concentrations rises dramatically by a factor of 2–4 at atmospheric CO2 levels of >220 ppm. Our results suggest that the equatorial Pacific acts as a nonlinear amplifier that allows global climate to transition from deglacial to full interglacial conditions once atmospheric CO2 levels reach threshold levels.
format	article
author	Li Lo Sheng-Pu Chang Kuo-Yen Wei Shih-Yu Lee Tsong-Hua Ou Yi-Chi Chen Chih-Kai Chuang Horng-Sheng Mii George S. Burr Min-Te Chen Ying-Hung Tung Meng-Chieh Tsai David A. Hodell Chuan-Chou Shen
author_facet	Li Lo Sheng-Pu Chang Kuo-Yen Wei Shih-Yu Lee Tsong-Hua Ou Yi-Chi Chen Chih-Kai Chuang Horng-Sheng Mii George S. Burr Min-Te Chen Ying-Hung Tung Meng-Chieh Tsai David A. Hodell Chuan-Chou Shen
author_sort	Li Lo
title	Nonlinear climatic sensitivity to greenhouse gases over past 4 glacial/interglacial cycles
title_short	Nonlinear climatic sensitivity to greenhouse gases over past 4 glacial/interglacial cycles
title_full	Nonlinear climatic sensitivity to greenhouse gases over past 4 glacial/interglacial cycles
title_fullStr	Nonlinear climatic sensitivity to greenhouse gases over past 4 glacial/interglacial cycles
title_full_unstemmed	Nonlinear climatic sensitivity to greenhouse gases over past 4 glacial/interglacial cycles
title_sort	nonlinear climatic sensitivity to greenhouse gases over past 4 glacial/interglacial cycles
publisher	Nature Portfolio
publishDate	2017
url	https://doaj.org/article/0727251caf1140f89727092e73399c13
work_keys_str_mv	AT lilo nonlinearclimaticsensitivitytogreenhousegasesoverpast4glacialinterglacialcycles AT shengpuchang nonlinearclimaticsensitivitytogreenhousegasesoverpast4glacialinterglacialcycles AT kuoyenwei nonlinearclimaticsensitivitytogreenhousegasesoverpast4glacialinterglacialcycles AT shihyulee nonlinearclimaticsensitivitytogreenhousegasesoverpast4glacialinterglacialcycles AT tsonghuaou nonlinearclimaticsensitivitytogreenhousegasesoverpast4glacialinterglacialcycles AT yichichen nonlinearclimaticsensitivitytogreenhousegasesoverpast4glacialinterglacialcycles AT chihkaichuang nonlinearclimaticsensitivitytogreenhousegasesoverpast4glacialinterglacialcycles AT horngshengmii nonlinearclimaticsensitivitytogreenhousegasesoverpast4glacialinterglacialcycles AT georgesburr nonlinearclimaticsensitivitytogreenhousegasesoverpast4glacialinterglacialcycles AT mintechen nonlinearclimaticsensitivitytogreenhousegasesoverpast4glacialinterglacialcycles AT yinghungtung nonlinearclimaticsensitivitytogreenhousegasesoverpast4glacialinterglacialcycles AT mengchiehtsai nonlinearclimaticsensitivitytogreenhousegasesoverpast4glacialinterglacialcycles AT davidahodell nonlinearclimaticsensitivitytogreenhousegasesoverpast4glacialinterglacialcycles AT chuanchoushen nonlinearclimaticsensitivitytogreenhousegasesoverpast4glacialinterglacialcycles
_version_	1718395382713548800

Nonlinear climatic sensitivity to greenhouse gases over past 4 glacial/interglacial cycles

Ejemplares similares