Modern and sub-fossil corals suggest reduced temperature variability in the eastern pole of the Indian Ocean Dipole during the medieval climate anomaly

Abstract We present two 40 year records of monthly coral Sr/Ca ratios from the eastern pole of the Indian Ocean Dipole. A modern coral covers the period from 1968 to 2007. A sub-fossil coral derives from the medieval climate anomaly (MCA) and spans 1100–1140 ad. The modern coral records SST variabil...

Descripción completa

Guardado en:

Detalles Bibliográficos
Autores principales:	Sri Yudawati Cahyarini, Miriam Pfeiffer, Lars Reuning, Volker Liebetrau, Wolf-Chr. Dullo, Hideko Takayanagi, Iwan Pramesti Anwar, Dwi Amanda Utami, Dieter Garbe-Schönberg, Marfasran Hendrizan, Anton Eisenhauer
Formato:	article
Lenguaje:	EN
Publicado:	Nature Portfolio 2021
Materias:	Medicine R Science Q
Acceso en línea:	https://doaj.org/article/df338ea7088a42a18e75b56dbe7e2c32
Etiquetas:	Agregar Etiqueta Sin Etiquetas, Sea el primero en etiquetar este registro!

id	oai:doaj.org-article:df338ea7088a42a18e75b56dbe7e2c32
record_format	dspace
spelling	oai:doaj.org-article:df338ea7088a42a18e75b56dbe7e2c322021-12-02T16:17:18ZModern and sub-fossil corals suggest reduced temperature variability in the eastern pole of the Indian Ocean Dipole during the medieval climate anomaly10.1038/s41598-021-94465-12045-2322https://doaj.org/article/df338ea7088a42a18e75b56dbe7e2c322021-07-01T00:00:00Zhttps://doi.org/10.1038/s41598-021-94465-1https://doaj.org/toc/2045-2322Abstract We present two 40 year records of monthly coral Sr/Ca ratios from the eastern pole of the Indian Ocean Dipole. A modern coral covers the period from 1968 to 2007. A sub-fossil coral derives from the medieval climate anomaly (MCA) and spans 1100–1140 ad. The modern coral records SST variability in the eastern pole of the Indian Ocean Dipole. A strong correlation is also found between coral Sr/Ca and the IOD index. The correlation with ENSO is asymmetric: the coral shows a moderate correlation with El Niño and a weak correlation with La Niña. The modern coral shows large interannual variability. Extreme IOD events cause cooling > 3 °C (1994, 1997) or ~ 2 °C (2006). In total, the modern coral indicates 32 warm/cool events, with 16 cool and 16 warm events. The MCA coral shows 24 warm/cool events, with 14 cool and 10 warm events. Only one cool event could be comparable to the positive Indian Ocean Dipole in 2006. The seasonal cycle of the MCA coral is reduced (< 50% of to the modern) and the skewness of the Sr/Ca data is lower. This suggests a deeper thermocline in the eastern Indian Ocean associated with a La Niña-like mean state in the Indo-Pacific during the MCA.Sri Yudawati CahyariniMiriam PfeifferLars ReuningVolker LiebetrauWolf-Chr. DulloHideko TakayanagiIwan Pramesti AnwarDwi Amanda UtamiDieter Garbe-SchönbergMarfasran HendrizanAnton EisenhauerNature PortfolioarticleMedicineRScienceQENScientific Reports, Vol 11, Iss 1, Pp 1-17 (2021)
institution	DOAJ
collection	DOAJ
language	EN
topic	Medicine R Science Q
spellingShingle	Medicine R Science Q Sri Yudawati Cahyarini Miriam Pfeiffer Lars Reuning Volker Liebetrau Wolf-Chr. Dullo Hideko Takayanagi Iwan Pramesti Anwar Dwi Amanda Utami Dieter Garbe-Schönberg Marfasran Hendrizan Anton Eisenhauer Modern and sub-fossil corals suggest reduced temperature variability in the eastern pole of the Indian Ocean Dipole during the medieval climate anomaly
description	Abstract We present two 40 year records of monthly coral Sr/Ca ratios from the eastern pole of the Indian Ocean Dipole. A modern coral covers the period from 1968 to 2007. A sub-fossil coral derives from the medieval climate anomaly (MCA) and spans 1100–1140 ad. The modern coral records SST variability in the eastern pole of the Indian Ocean Dipole. A strong correlation is also found between coral Sr/Ca and the IOD index. The correlation with ENSO is asymmetric: the coral shows a moderate correlation with El Niño and a weak correlation with La Niña. The modern coral shows large interannual variability. Extreme IOD events cause cooling > 3 °C (1994, 1997) or ~ 2 °C (2006). In total, the modern coral indicates 32 warm/cool events, with 16 cool and 16 warm events. The MCA coral shows 24 warm/cool events, with 14 cool and 10 warm events. Only one cool event could be comparable to the positive Indian Ocean Dipole in 2006. The seasonal cycle of the MCA coral is reduced (< 50% of to the modern) and the skewness of the Sr/Ca data is lower. This suggests a deeper thermocline in the eastern Indian Ocean associated with a La Niña-like mean state in the Indo-Pacific during the MCA.
format	article
author	Sri Yudawati Cahyarini Miriam Pfeiffer Lars Reuning Volker Liebetrau Wolf-Chr. Dullo Hideko Takayanagi Iwan Pramesti Anwar Dwi Amanda Utami Dieter Garbe-Schönberg Marfasran Hendrizan Anton Eisenhauer
author_facet	Sri Yudawati Cahyarini Miriam Pfeiffer Lars Reuning Volker Liebetrau Wolf-Chr. Dullo Hideko Takayanagi Iwan Pramesti Anwar Dwi Amanda Utami Dieter Garbe-Schönberg Marfasran Hendrizan Anton Eisenhauer
author_sort	Sri Yudawati Cahyarini
title	Modern and sub-fossil corals suggest reduced temperature variability in the eastern pole of the Indian Ocean Dipole during the medieval climate anomaly
title_short	Modern and sub-fossil corals suggest reduced temperature variability in the eastern pole of the Indian Ocean Dipole during the medieval climate anomaly
title_full	Modern and sub-fossil corals suggest reduced temperature variability in the eastern pole of the Indian Ocean Dipole during the medieval climate anomaly
title_fullStr	Modern and sub-fossil corals suggest reduced temperature variability in the eastern pole of the Indian Ocean Dipole during the medieval climate anomaly
title_full_unstemmed	Modern and sub-fossil corals suggest reduced temperature variability in the eastern pole of the Indian Ocean Dipole during the medieval climate anomaly
title_sort	modern and sub-fossil corals suggest reduced temperature variability in the eastern pole of the indian ocean dipole during the medieval climate anomaly
publisher	Nature Portfolio
publishDate	2021
url	https://doaj.org/article/df338ea7088a42a18e75b56dbe7e2c32
work_keys_str_mv	AT sriyudawaticahyarini modernandsubfossilcoralssuggestreducedtemperaturevariabilityintheeasternpoleoftheindianoceandipoleduringthemedievalclimateanomaly AT miriampfeiffer modernandsubfossilcoralssuggestreducedtemperaturevariabilityintheeasternpoleoftheindianoceandipoleduringthemedievalclimateanomaly AT larsreuning modernandsubfossilcoralssuggestreducedtemperaturevariabilityintheeasternpoleoftheindianoceandipoleduringthemedievalclimateanomaly AT volkerliebetrau modernandsubfossilcoralssuggestreducedtemperaturevariabilityintheeasternpoleoftheindianoceandipoleduringthemedievalclimateanomaly AT wolfchrdullo modernandsubfossilcoralssuggestreducedtemperaturevariabilityintheeasternpoleoftheindianoceandipoleduringthemedievalclimateanomaly AT hidekotakayanagi modernandsubfossilcoralssuggestreducedtemperaturevariabilityintheeasternpoleoftheindianoceandipoleduringthemedievalclimateanomaly AT iwanpramestianwar modernandsubfossilcoralssuggestreducedtemperaturevariabilityintheeasternpoleoftheindianoceandipoleduringthemedievalclimateanomaly AT dwiamandautami modernandsubfossilcoralssuggestreducedtemperaturevariabilityintheeasternpoleoftheindianoceandipoleduringthemedievalclimateanomaly AT dietergarbeschonberg modernandsubfossilcoralssuggestreducedtemperaturevariabilityintheeasternpoleoftheindianoceandipoleduringthemedievalclimateanomaly AT marfasranhendrizan modernandsubfossilcoralssuggestreducedtemperaturevariabilityintheeasternpoleoftheindianoceandipoleduringthemedievalclimateanomaly AT antoneisenhauer modernandsubfossilcoralssuggestreducedtemperaturevariabilityintheeasternpoleoftheindianoceandipoleduringthemedievalclimateanomaly
_version_	1718384262424559616

Modern and sub-fossil corals suggest reduced temperature variability in the eastern pole of the Indian Ocean Dipole during the medieval climate anomaly

Ejemplares similares