A low seasonality scenario in the Mediterranean Sea during the Calabrian (Early Pleistocene) inferred from fossil Arctica islandica shells
Understanding past seasonal temperature variability in the ocean is essential to evaluate the effects of future climate change on marine ecosystems. Here, we estimate seasonal water temperature amplitudes from stable oxygen isotope (δ18Oshell) values of fossil shells of Arctica islandica (assuming...
Published in: | Palaeogeography, Palaeoclimatology, Palaeoecology |
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Online Access: | http://hdl.handle.net/11585/626326 https://doi.org/10.1016/j.palaeo.2017.07.027 http://www.sciencedirect.com/science/journal/00310182/319 |
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ftunibolognairis:oai:cris.unibo.it:11585/626326 2024-02-11T10:01:51+01:00 A low seasonality scenario in the Mediterranean Sea during the Calabrian (Early Pleistocene) inferred from fossil Arctica islandica shells von Leesen, Gotje Beierlein, Lars Scarponi, Daniele Schöne, Bernd R. Brey, Thomas von Leesen, Gotje* Beierlein, Lar Scarponi, Daniele Schöne, Bernd R. Brey, Thomas 2017 STAMPA http://hdl.handle.net/11585/626326 https://doi.org/10.1016/j.palaeo.2017.07.027 http://www.sciencedirect.com/science/journal/00310182/319 eng eng info:eu-repo/semantics/altIdentifier/wos/WOS:000419747400052 volume:485 firstpage:706 lastpage:714 numberofpages:9 journal:PALAEOGEOGRAPHY PALAEOCLIMATOLOGY PALAEOECOLOGY http://hdl.handle.net/11585/626326 doi:10.1016/j.palaeo.2017.07.027 info:eu-repo/semantics/altIdentifier/scopus/2-s2.0-85026637695 http://www.sciencedirect.com/science/journal/00310182/319 Paleotemperature reconstruction Sclerochronology Sicily Stable oxygen isotope Oceanography Ecology Evolution Behavior and Systematic Earth-Surface Processe Paleontology info:eu-repo/semantics/article 2017 ftunibolognairis https://doi.org/10.1016/j.palaeo.2017.07.027 2024-01-24T17:50:53Z Understanding past seasonal temperature variability in the ocean is essential to evaluate the effects of future climate change on marine ecosystems. Here, we estimate seasonal water temperature amplitudes from stable oxygen isotope (δ18Oshell) values of fossil shells of Arctica islandica (assuming δ18Owater= + 0.9 ± 0.1‰ V-SMOW). Specimens were collected from three Pleistocene successions (Emilian and Sicilian substages of the Calabrian) in Central and Southern Italy (i.e., Rome, Lecce and Sicily). Biostratigraphic analyses from Rome Quarry deposits indicate an age between 1.6 and 1.2 Ma, whereas Sicily and Lecce successions are slightly more recent (between 1.1 and 0.62 Ma). Prior to carbonate geochemical analysis, we checked the shells for potential diagenetic alterations (e.g., from aragonite to calcite) using confocal Raman microscopy. δ18Oshelltransects indicate an annual temperature amplitude of about 3 °C during the Early Pleistocene. This is in sharp contrast to reconstructions based on faunal assemblages, according to which the simultaneous occurrence of boreal and warm-water species in the Calabrian Mediterranean Sea suggests a much higher seasonality (ca. 10 °C). The low seasonality and the relatively cold water (9–10 °C) indicate the outcrops represent colder climatic conditions compared to modern times, and suggest the occurrence of a maximum glacial phase. Article in Journal/Newspaper Arctica islandica IRIS Università degli Studi di Bologna (CRIS - Current Research Information System) Palaeogeography, Palaeoclimatology, Palaeoecology 485 706 714 |
institution |
Open Polar |
collection |
IRIS Università degli Studi di Bologna (CRIS - Current Research Information System) |
op_collection_id |
ftunibolognairis |
language |
English |
topic |
Paleotemperature reconstruction Sclerochronology Sicily Stable oxygen isotope Oceanography Ecology Evolution Behavior and Systematic Earth-Surface Processe Paleontology |
spellingShingle |
Paleotemperature reconstruction Sclerochronology Sicily Stable oxygen isotope Oceanography Ecology Evolution Behavior and Systematic Earth-Surface Processe Paleontology von Leesen, Gotje Beierlein, Lars Scarponi, Daniele Schöne, Bernd R. Brey, Thomas A low seasonality scenario in the Mediterranean Sea during the Calabrian (Early Pleistocene) inferred from fossil Arctica islandica shells |
topic_facet |
Paleotemperature reconstruction Sclerochronology Sicily Stable oxygen isotope Oceanography Ecology Evolution Behavior and Systematic Earth-Surface Processe Paleontology |
description |
Understanding past seasonal temperature variability in the ocean is essential to evaluate the effects of future climate change on marine ecosystems. Here, we estimate seasonal water temperature amplitudes from stable oxygen isotope (δ18Oshell) values of fossil shells of Arctica islandica (assuming δ18Owater= + 0.9 ± 0.1‰ V-SMOW). Specimens were collected from three Pleistocene successions (Emilian and Sicilian substages of the Calabrian) in Central and Southern Italy (i.e., Rome, Lecce and Sicily). Biostratigraphic analyses from Rome Quarry deposits indicate an age between 1.6 and 1.2 Ma, whereas Sicily and Lecce successions are slightly more recent (between 1.1 and 0.62 Ma). Prior to carbonate geochemical analysis, we checked the shells for potential diagenetic alterations (e.g., from aragonite to calcite) using confocal Raman microscopy. δ18Oshelltransects indicate an annual temperature amplitude of about 3 °C during the Early Pleistocene. This is in sharp contrast to reconstructions based on faunal assemblages, according to which the simultaneous occurrence of boreal and warm-water species in the Calabrian Mediterranean Sea suggests a much higher seasonality (ca. 10 °C). The low seasonality and the relatively cold water (9–10 °C) indicate the outcrops represent colder climatic conditions compared to modern times, and suggest the occurrence of a maximum glacial phase. |
author2 |
von Leesen, Gotje* Beierlein, Lar Scarponi, Daniele Schöne, Bernd R. Brey, Thomas |
format |
Article in Journal/Newspaper |
author |
von Leesen, Gotje Beierlein, Lars Scarponi, Daniele Schöne, Bernd R. Brey, Thomas |
author_facet |
von Leesen, Gotje Beierlein, Lars Scarponi, Daniele Schöne, Bernd R. Brey, Thomas |
author_sort |
von Leesen, Gotje |
title |
A low seasonality scenario in the Mediterranean Sea during the Calabrian (Early Pleistocene) inferred from fossil Arctica islandica shells |
title_short |
A low seasonality scenario in the Mediterranean Sea during the Calabrian (Early Pleistocene) inferred from fossil Arctica islandica shells |
title_full |
A low seasonality scenario in the Mediterranean Sea during the Calabrian (Early Pleistocene) inferred from fossil Arctica islandica shells |
title_fullStr |
A low seasonality scenario in the Mediterranean Sea during the Calabrian (Early Pleistocene) inferred from fossil Arctica islandica shells |
title_full_unstemmed |
A low seasonality scenario in the Mediterranean Sea during the Calabrian (Early Pleistocene) inferred from fossil Arctica islandica shells |
title_sort |
low seasonality scenario in the mediterranean sea during the calabrian (early pleistocene) inferred from fossil arctica islandica shells |
publishDate |
2017 |
url |
http://hdl.handle.net/11585/626326 https://doi.org/10.1016/j.palaeo.2017.07.027 http://www.sciencedirect.com/science/journal/00310182/319 |
genre |
Arctica islandica |
genre_facet |
Arctica islandica |
op_relation |
info:eu-repo/semantics/altIdentifier/wos/WOS:000419747400052 volume:485 firstpage:706 lastpage:714 numberofpages:9 journal:PALAEOGEOGRAPHY PALAEOCLIMATOLOGY PALAEOECOLOGY http://hdl.handle.net/11585/626326 doi:10.1016/j.palaeo.2017.07.027 info:eu-repo/semantics/altIdentifier/scopus/2-s2.0-85026637695 http://www.sciencedirect.com/science/journal/00310182/319 |
op_doi |
https://doi.org/10.1016/j.palaeo.2017.07.027 |
container_title |
Palaeogeography, Palaeoclimatology, Palaeoecology |
container_volume |
485 |
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706 |
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714 |
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