Climate variability of the last 2700 years in the Southern Adriatic Sea: Coccolithophore evidences
New information on palaeoenvironmental conditions over the past ~2700 years in the Central Mediterranean Sea have been acquired through the high-resolution study of calcareous nannofossils preserved in the sediment core SW104-ND14Q recovered in the Southern Adriatic Sea (SAS) at 1013-m water depth....
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Online Access: | https://oskar-bordeaux.fr/handle/20.500.12278/189149 https://hdl.handle.net/20.500.12278/189149 https://doi.org/10.1177/0959683619865600 |
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ftoskarbordeaux:oai:oskar-bordeaux.fr:20.500.12278/189149 2024-04-28T08:31:00+00:00 Climate variability of the last 2700 years in the Southern Adriatic Sea: Coccolithophore evidences CASCELLA, Antonio BONOMO, Sergio JALALI, Bassem SICRE, Marie-Alexandrine PELOSI, Nicola SCHMIDT, Sabine LIRER, Fabrizio 2019-07-31 https://oskar-bordeaux.fr/handle/20.500.12278/189149 https://hdl.handle.net/20.500.12278/189149 https://doi.org/10.1177/0959683619865600 EN eng 0959-6836 https://oskar-bordeaux.fr/handle/20.500.12278/189149 doi:10.1177/0959683619865600 open Pas de Licence CC South Adriatic Sea central Mediterranean reworked coccoliths last millennia coccolithophorid primary productivity coccolithophores Sciences de l'environnement Sciences de l'environnement/Milieux et Changements globaux Article de revue 2019 ftoskarbordeaux https://doi.org/20.500.12278/18914910.1177/0959683619865600 2024-04-08T14:48:33Z New information on palaeoenvironmental conditions over the past ~2700 years in the Central Mediterranean Sea have been acquired through the high-resolution study of calcareous nannofossils preserved in the sediment core SW104-ND14Q recovered in the Southern Adriatic Sea (SAS) at 1013-m water depth. The surface water properties at this open SAS site are sensitive to atmospheric forcing (acting both at local and regional scale) and the North Ionian Sea driven inflowing waters. Our data show a relationship between reworked coccolith abundances, flood frequency across the Southern Alps and the North Atlantic Oscillation (NAO) confirming their value as indicator of runoff/precipitation. Changes in the abundance of the opportunistic (r-strategist) species Emiliania huxleyi and deep dweller taxa Florisphaera profunda were used to reconstruct the upper water column stratification and associated changes in coccolithophorid productivity. The negative correlation between reworked coccoliths and the N-Ratio (r = −0.44; p = 6−7) suggest that fresh water induced stratification is a controlling factor of the SAS coccolithophorid production. High coccolithophorid productivity levels occurred during dry periods and/or time intervals of inflowing salty and nutrient-rich Levantine Intermediate Waters favouring convection while lower levels took place during high freshwater discharge, mainly during the ‘Little Ice Age’ and two centennial scale intervals of weakest NAO around 200 BCE and 500 CE. Article in Journal/Newspaper North Atlantic North Atlantic oscillation OSKAR Bordeaux (Open Science Knowledge ARchive) The Holocene 30 1 53 64 |
institution |
Open Polar |
collection |
OSKAR Bordeaux (Open Science Knowledge ARchive) |
op_collection_id |
ftoskarbordeaux |
language |
English |
topic |
South Adriatic Sea central Mediterranean reworked coccoliths last millennia coccolithophorid primary productivity coccolithophores Sciences de l'environnement Sciences de l'environnement/Milieux et Changements globaux |
spellingShingle |
South Adriatic Sea central Mediterranean reworked coccoliths last millennia coccolithophorid primary productivity coccolithophores Sciences de l'environnement Sciences de l'environnement/Milieux et Changements globaux CASCELLA, Antonio BONOMO, Sergio JALALI, Bassem SICRE, Marie-Alexandrine PELOSI, Nicola SCHMIDT, Sabine LIRER, Fabrizio Climate variability of the last 2700 years in the Southern Adriatic Sea: Coccolithophore evidences |
topic_facet |
South Adriatic Sea central Mediterranean reworked coccoliths last millennia coccolithophorid primary productivity coccolithophores Sciences de l'environnement Sciences de l'environnement/Milieux et Changements globaux |
description |
New information on palaeoenvironmental conditions over the past ~2700 years in the Central Mediterranean Sea have been acquired through the high-resolution study of calcareous nannofossils preserved in the sediment core SW104-ND14Q recovered in the Southern Adriatic Sea (SAS) at 1013-m water depth. The surface water properties at this open SAS site are sensitive to atmospheric forcing (acting both at local and regional scale) and the North Ionian Sea driven inflowing waters. Our data show a relationship between reworked coccolith abundances, flood frequency across the Southern Alps and the North Atlantic Oscillation (NAO) confirming their value as indicator of runoff/precipitation. Changes in the abundance of the opportunistic (r-strategist) species Emiliania huxleyi and deep dweller taxa Florisphaera profunda were used to reconstruct the upper water column stratification and associated changes in coccolithophorid productivity. The negative correlation between reworked coccoliths and the N-Ratio (r = −0.44; p = 6−7) suggest that fresh water induced stratification is a controlling factor of the SAS coccolithophorid production. High coccolithophorid productivity levels occurred during dry periods and/or time intervals of inflowing salty and nutrient-rich Levantine Intermediate Waters favouring convection while lower levels took place during high freshwater discharge, mainly during the ‘Little Ice Age’ and two centennial scale intervals of weakest NAO around 200 BCE and 500 CE. |
format |
Article in Journal/Newspaper |
author |
CASCELLA, Antonio BONOMO, Sergio JALALI, Bassem SICRE, Marie-Alexandrine PELOSI, Nicola SCHMIDT, Sabine LIRER, Fabrizio |
author_facet |
CASCELLA, Antonio BONOMO, Sergio JALALI, Bassem SICRE, Marie-Alexandrine PELOSI, Nicola SCHMIDT, Sabine LIRER, Fabrizio |
author_sort |
CASCELLA, Antonio |
title |
Climate variability of the last 2700 years in the Southern Adriatic Sea: Coccolithophore evidences |
title_short |
Climate variability of the last 2700 years in the Southern Adriatic Sea: Coccolithophore evidences |
title_full |
Climate variability of the last 2700 years in the Southern Adriatic Sea: Coccolithophore evidences |
title_fullStr |
Climate variability of the last 2700 years in the Southern Adriatic Sea: Coccolithophore evidences |
title_full_unstemmed |
Climate variability of the last 2700 years in the Southern Adriatic Sea: Coccolithophore evidences |
title_sort |
climate variability of the last 2700 years in the southern adriatic sea: coccolithophore evidences |
publishDate |
2019 |
url |
https://oskar-bordeaux.fr/handle/20.500.12278/189149 https://hdl.handle.net/20.500.12278/189149 https://doi.org/10.1177/0959683619865600 |
genre |
North Atlantic North Atlantic oscillation |
genre_facet |
North Atlantic North Atlantic oscillation |
op_relation |
0959-6836 https://oskar-bordeaux.fr/handle/20.500.12278/189149 doi:10.1177/0959683619865600 |
op_rights |
open Pas de Licence CC |
op_doi |
https://doi.org/20.500.12278/18914910.1177/0959683619865600 |
container_title |
The Holocene |
container_volume |
30 |
container_issue |
1 |
container_start_page |
53 |
op_container_end_page |
64 |
_version_ |
1797588677323390976 |