Paleotemperature record of the Middle Devonian Kačák Episode

Abstract The Middle Devonian Epoch, ~ 393–383 million years ago, is known for a peak in diversity and highest latitudinal distribution of coral and stromatoporoid reefs. About 388 million years ago, during the late Eifelian and earliest Givetian, climax conditions were interrupted by the polyphased...

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Autores principales:	Thomas J. Suttner, Erika Kido, Michael M. Joachimski, Stanislava Vodrážková, Monica Pondrelli, Carlo Corradini, Maria G. Corriga, Luca Simonetto, Michal Kubajko
Formato:	article
Lenguaje:	EN
Publicado:	Nature Portfolio 2021
Materias:	Medicine R Science Q
Acceso en línea:	https://doaj.org/article/c460e4f684fa49d5b903f46e5b07ced1
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id	oai:doaj.org-article:c460e4f684fa49d5b903f46e5b07ced1
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spelling	oai:doaj.org-article:c460e4f684fa49d5b903f46e5b07ced12021-12-02T15:10:50ZPaleotemperature record of the Middle Devonian Kačák Episode10.1038/s41598-021-96013-32045-2322https://doaj.org/article/c460e4f684fa49d5b903f46e5b07ced12021-08-01T00:00:00Zhttps://doi.org/10.1038/s41598-021-96013-3https://doaj.org/toc/2045-2322Abstract The Middle Devonian Epoch, ~ 393–383 million years ago, is known for a peak in diversity and highest latitudinal distribution of coral and stromatoporoid reefs. About 388 million years ago, during the late Eifelian and earliest Givetian, climax conditions were interrupted by the polyphased Kačák Episode, a short-lived period of marine dys-/anoxia associated with climate warming that lasted less than 500 kyr. Reconstruction of the seawater temperature contributes to a better understanding of the climate conditions marine biota were exposed to during the event interval. To date, conodont apatite-based paleotemperatures across the Eifelian–Givetian boundary interval have been published from Belarus, France, Germany and North America (10–36° S paleolatitude). Here we provide new δ18Oapatite data from the Carnic Alps (Austria, Italy) and the Prague Synform (Czech Republic). For better approximation of the paleotemperature record across the Kačák Episode, a latitude-dependent correction for Middle Devonian seawater δ18O is applied. Because δ18Oapatite data from shallow marine sections are influenced by regional salinity variations, calculated mean sea surface temperatures (SST) are restricted to more open marine settings (22–34° S paleolatitude). Water temperatures reach ~ 34 °C in the Prague Synform and ~ 33 °C in the Carnic Alps and suggest that SSTs of the southern hemisphere low latitudes were ~ 6 °C higher than previously assumed for this time interval.Thomas J. SuttnerErika KidoMichael M. JoachimskiStanislava VodrážkováMonica PondrelliCarlo CorradiniMaria G. CorrigaLuca SimonettoMichal KubajkoNature PortfolioarticleMedicineRScienceQENScientific Reports, Vol 11, Iss 1, Pp 1-10 (2021)
institution	DOAJ
collection	DOAJ
language	EN
topic	Medicine R Science Q
spellingShingle	Medicine R Science Q Thomas J. Suttner Erika Kido Michael M. Joachimski Stanislava Vodrážková Monica Pondrelli Carlo Corradini Maria G. Corriga Luca Simonetto Michal Kubajko Paleotemperature record of the Middle Devonian Kačák Episode
description	Abstract The Middle Devonian Epoch, ~ 393–383 million years ago, is known for a peak in diversity and highest latitudinal distribution of coral and stromatoporoid reefs. About 388 million years ago, during the late Eifelian and earliest Givetian, climax conditions were interrupted by the polyphased Kačák Episode, a short-lived period of marine dys-/anoxia associated with climate warming that lasted less than 500 kyr. Reconstruction of the seawater temperature contributes to a better understanding of the climate conditions marine biota were exposed to during the event interval. To date, conodont apatite-based paleotemperatures across the Eifelian–Givetian boundary interval have been published from Belarus, France, Germany and North America (10–36° S paleolatitude). Here we provide new δ18Oapatite data from the Carnic Alps (Austria, Italy) and the Prague Synform (Czech Republic). For better approximation of the paleotemperature record across the Kačák Episode, a latitude-dependent correction for Middle Devonian seawater δ18O is applied. Because δ18Oapatite data from shallow marine sections are influenced by regional salinity variations, calculated mean sea surface temperatures (SST) are restricted to more open marine settings (22–34° S paleolatitude). Water temperatures reach ~ 34 °C in the Prague Synform and ~ 33 °C in the Carnic Alps and suggest that SSTs of the southern hemisphere low latitudes were ~ 6 °C higher than previously assumed for this time interval.
format	article
author	Thomas J. Suttner Erika Kido Michael M. Joachimski Stanislava Vodrážková Monica Pondrelli Carlo Corradini Maria G. Corriga Luca Simonetto Michal Kubajko
author_facet	Thomas J. Suttner Erika Kido Michael M. Joachimski Stanislava Vodrážková Monica Pondrelli Carlo Corradini Maria G. Corriga Luca Simonetto Michal Kubajko
author_sort	Thomas J. Suttner
title	Paleotemperature record of the Middle Devonian Kačák Episode
title_short	Paleotemperature record of the Middle Devonian Kačák Episode
title_full	Paleotemperature record of the Middle Devonian Kačák Episode
title_fullStr	Paleotemperature record of the Middle Devonian Kačák Episode
title_full_unstemmed	Paleotemperature record of the Middle Devonian Kačák Episode
title_sort	paleotemperature record of the middle devonian kačák episode
publisher	Nature Portfolio
publishDate	2021
url	https://doaj.org/article/c460e4f684fa49d5b903f46e5b07ced1
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Paleotemperature record of the Middle Devonian Kačák Episode

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