Solar forcing for nutricline depth variability inferred by coccoliths in the pre-industrial northwestern Mediterranean
The oceanic system has been rapidly changing under human-induced climate change that is taking place at unprecedented rates. The paleoclimate archive of the last two millennia is often adopted to discern the ongoing anthropogenic global warming from the pre-industrial natural climate variability. Th...
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ftunivpalermo:oai:iris.unipa.it:10447/586940 2024-02-11T10:08:06+01:00 Solar forcing for nutricline depth variability inferred by coccoliths in the pre-industrial northwestern Mediterranean Incarbona A. Bonomo S. Cacho I. Lirer F. Margaritelli G. Pecoraro D. & Ziveri, P. Incarbona, A., Bonomo, S., Cacho, I., Lirer, F., Margaritelli, G., Pecoraro, D., & Ziveri, P. 2023-04 https://hdl.handle.net/10447/586940 https://doi.org/10.1016/j.gloplacha.2023.104102 eng eng Elsevier country:NL volume:224 firstpage:1 lastpage:15 numberofpages:15 journal:GLOBAL AND PLANETARY CHANGE https://hdl.handle.net/10447/586940 doi:10.1016/j.gloplacha.2023.104102 info:eu-repo/semantics/altIdentifier/scopus/2-s2.0-85151780220 info:eu-repo/semantics/openAccess Coccolithophore Pre-industrial Biodiversity Mediterranean Solar forcing Settore GEO/01 - Paleontologia E Paleoecologia info:eu-repo/semantics/article 2023 ftunivpalermo https://doi.org/10.1016/j.gloplacha.2023.104102 2024-01-23T23:20:23Z The oceanic system has been rapidly changing under human-induced climate change that is taking place at unprecedented rates. The paleoclimate archive of the last two millennia is often adopted to discern the ongoing anthropogenic global warming from the pre-industrial natural climate variability. The Mediterranean Sea is an especially critical system, being particularly affected by climate change. A common group of marine unicellular planktonic calcifiers, coccolithophores, are forming calcite plates, coccoliths. When reaching the sediments, they have been employed as a proxy in many paleoenvironmental reconstructions and are increasingly used in the last centuries. Recent studies indicate a subtle response to historical climate changes, except for primary productivity switches during the Little Ice Age and, most importantly, across the Industrial age. In this work, we use coccolith decadal-scale resolution data from core HER-MC-MR3.3, recovered in the Balearic Sea, exploring their variability over the pre-industrial age, from 700 BCE to 1740 CE. Results are compared to planktonic foraminifera stable isotopes, planktonic foraminiferal assemblages, alkenone-derived SSTs and foraminiferal Mg/Ca-derived SSTs, previously acquired in the same sediment core. Abundance variations in coccolith assemblages, expressed as Shannon-Wiener diversity H-index changes or as trends and fluctuations in ecological groups are associated with historical climate changes, among others the Medieval Climatic Anomaly and the Little Ice Age, indicating repeated modifications in surface water conditions, in response to hydrological and atmospheric changing patterns. A tight relationship between deep nutricline and upper water column stratified conditions, derived from high abundance of Florisphaera profunda, and high solar irradiation levels is established. The solar activity fingerprint in the F. profunda distribution pattern is further assessed by spectral analysis, with the emergence of significant periodicities observed in solar ... Article in Journal/Newspaper Planktonic foraminifera IRIS Università degli Studi di Palermo Global and Planetary Change 224 104102 |
institution |
Open Polar |
collection |
IRIS Università degli Studi di Palermo |
op_collection_id |
ftunivpalermo |
language |
English |
topic |
Coccolithophore Pre-industrial Biodiversity Mediterranean Solar forcing Settore GEO/01 - Paleontologia E Paleoecologia |
spellingShingle |
Coccolithophore Pre-industrial Biodiversity Mediterranean Solar forcing Settore GEO/01 - Paleontologia E Paleoecologia Incarbona A. Bonomo S. Cacho I. Lirer F. Margaritelli G. Pecoraro D. & Ziveri, P. Solar forcing for nutricline depth variability inferred by coccoliths in the pre-industrial northwestern Mediterranean |
topic_facet |
Coccolithophore Pre-industrial Biodiversity Mediterranean Solar forcing Settore GEO/01 - Paleontologia E Paleoecologia |
description |
The oceanic system has been rapidly changing under human-induced climate change that is taking place at unprecedented rates. The paleoclimate archive of the last two millennia is often adopted to discern the ongoing anthropogenic global warming from the pre-industrial natural climate variability. The Mediterranean Sea is an especially critical system, being particularly affected by climate change. A common group of marine unicellular planktonic calcifiers, coccolithophores, are forming calcite plates, coccoliths. When reaching the sediments, they have been employed as a proxy in many paleoenvironmental reconstructions and are increasingly used in the last centuries. Recent studies indicate a subtle response to historical climate changes, except for primary productivity switches during the Little Ice Age and, most importantly, across the Industrial age. In this work, we use coccolith decadal-scale resolution data from core HER-MC-MR3.3, recovered in the Balearic Sea, exploring their variability over the pre-industrial age, from 700 BCE to 1740 CE. Results are compared to planktonic foraminifera stable isotopes, planktonic foraminiferal assemblages, alkenone-derived SSTs and foraminiferal Mg/Ca-derived SSTs, previously acquired in the same sediment core. Abundance variations in coccolith assemblages, expressed as Shannon-Wiener diversity H-index changes or as trends and fluctuations in ecological groups are associated with historical climate changes, among others the Medieval Climatic Anomaly and the Little Ice Age, indicating repeated modifications in surface water conditions, in response to hydrological and atmospheric changing patterns. A tight relationship between deep nutricline and upper water column stratified conditions, derived from high abundance of Florisphaera profunda, and high solar irradiation levels is established. The solar activity fingerprint in the F. profunda distribution pattern is further assessed by spectral analysis, with the emergence of significant periodicities observed in solar ... |
author2 |
Incarbona, A., Bonomo, S., Cacho, I., Lirer, F., Margaritelli, G., Pecoraro, D., & Ziveri, P. |
format |
Article in Journal/Newspaper |
author |
Incarbona A. Bonomo S. Cacho I. Lirer F. Margaritelli G. Pecoraro D. & Ziveri, P. |
author_facet |
Incarbona A. Bonomo S. Cacho I. Lirer F. Margaritelli G. Pecoraro D. & Ziveri, P. |
author_sort |
Incarbona A. |
title |
Solar forcing for nutricline depth variability inferred by coccoliths in the pre-industrial northwestern Mediterranean |
title_short |
Solar forcing for nutricline depth variability inferred by coccoliths in the pre-industrial northwestern Mediterranean |
title_full |
Solar forcing for nutricline depth variability inferred by coccoliths in the pre-industrial northwestern Mediterranean |
title_fullStr |
Solar forcing for nutricline depth variability inferred by coccoliths in the pre-industrial northwestern Mediterranean |
title_full_unstemmed |
Solar forcing for nutricline depth variability inferred by coccoliths in the pre-industrial northwestern Mediterranean |
title_sort |
solar forcing for nutricline depth variability inferred by coccoliths in the pre-industrial northwestern mediterranean |
publisher |
Elsevier |
publishDate |
2023 |
url |
https://hdl.handle.net/10447/586940 https://doi.org/10.1016/j.gloplacha.2023.104102 |
genre |
Planktonic foraminifera |
genre_facet |
Planktonic foraminifera |
op_relation |
volume:224 firstpage:1 lastpage:15 numberofpages:15 journal:GLOBAL AND PLANETARY CHANGE https://hdl.handle.net/10447/586940 doi:10.1016/j.gloplacha.2023.104102 info:eu-repo/semantics/altIdentifier/scopus/2-s2.0-85151780220 |
op_rights |
info:eu-repo/semantics/openAccess |
op_doi |
https://doi.org/10.1016/j.gloplacha.2023.104102 |
container_title |
Global and Planetary Change |
container_volume |
224 |
container_start_page |
104102 |
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1790607048092680192 |