Calcareous plankton response to orbital and millennial-scale climate changes across the Middle Pleistocene in the western Mediterranean
The paleoenvironmental conditions through MIS 15-9 at the Mediterranean Ocean Drilling Program (ODP) Site 975 were interpreted by high resolution study of calcareous plankton assemblages compared with available δ18O and δ13C records and high resolution paleoclimate proxies from the Atlantic Ocean. S...
Published in: | Palaeogeography, Palaeoclimatology, Palaeoecology |
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Online Access: | http://hdl.handle.net/11586/117616 https://doi.org/10.1016/j.palaeo.2013.09.005 |
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ftunivbari:oai:ricerca.uniba.it:11586/117616 2024-04-14T08:14:59+00:00 Calcareous plankton response to orbital and millennial-scale climate changes across the Middle Pleistocene in the western Mediterranean GIRONE, ANGELA MAIORANO, Patrizia MARINO, Maria Kucera M. Girone, Angela Maiorano, Patrizia Marino, Maria Kucera, M. 2013 http://hdl.handle.net/11586/117616 https://doi.org/10.1016/j.palaeo.2013.09.005 eng eng info:eu-repo/semantics/altIdentifier/wos/000330488400010 volume:392 firstpage:105 lastpage:116 numberofpages:12 journal:PALAEOGEOGRAPHY PALAEOCLIMATOLOGY PALAEOECOLOGY http://hdl.handle.net/11586/117616 doi:10.1016/j.palaeo.2013.09.005 info:eu-repo/semantics/altIdentifier/scopus/2-s2.0-84885110613 info:eu-repo/semantics/article 2013 ftunivbari https://doi.org/10.1016/j.palaeo.2013.09.005 2024-03-21T18:06:25Z The paleoenvironmental conditions through MIS 15-9 at the Mediterranean Ocean Drilling Program (ODP) Site 975 were interpreted by high resolution study of calcareous plankton assemblages compared with available δ18O and δ13C records and high resolution paleoclimate proxies from the Atlantic Ocean. Sea Surface Temperatures (SSTs) have been estimated fromplanktonic foraminiferal assemblages using the artificial neural networks method. Calcareous plankton varied dominantly on a glacial–interglacial scale as testified by the SST record, foraminiferal diversity, total coccolith abundance and changes in warm-water calcareous nannofossil taxa. A general increase in foraminiferal diversity and of total coccolith abundance is observed during interglacials.Warmest SSTs are reached during MIS 11, while MIS 12 and MIS 10 represent the coldest intervals of the studied record. During MIS 12, one of the most extreme glacials of the last million years, occurrence of Globorotalia inflata and of neogloboquadrinids indicates a shoaling of the interface between Atlantic inflowing and Mediterranean outflowing waters. Among calcareous nannofossils the distribution of Gephyrocapsa margereli–Gephyrocapsa muellerae N 4 μm also supports a reduced Atlantic–Mediterranean exchange during MIS 12. Superimposed on glacial–interglacial variability, six short-term coolings are recognized during MIS 12 and 10, which appear comparable in their distribution and amplitude to the Heinrich-type events documented in the Atlantic Ocean in the same interval. During these H-type events, Neogloboquadrina pachyderma (s) and G. margereli– G.muellerae N 4 μmincrease as a response to the enhanced inflow of cold Atlanticwater into theMediterranean via the Strait of Gibraltar. Mediterranean surfacewater hydrography appears to have beenmost severely affected at Termination V during the H-type event Ht4, possibly as a response to a large volume of Atlantic meltwater inflow via the Strait of Gibraltar and/or to freshwater/terrigenous input deriving from local ... Article in Journal/Newspaper Neogloboquadrina pachyderma Università degli Studi di Bari Aldo Moro: CINECA IRIS Palaeogeography, Palaeoclimatology, Palaeoecology 392 105 116 |
institution |
Open Polar |
collection |
Università degli Studi di Bari Aldo Moro: CINECA IRIS |
op_collection_id |
ftunivbari |
language |
English |
description |
The paleoenvironmental conditions through MIS 15-9 at the Mediterranean Ocean Drilling Program (ODP) Site 975 were interpreted by high resolution study of calcareous plankton assemblages compared with available δ18O and δ13C records and high resolution paleoclimate proxies from the Atlantic Ocean. Sea Surface Temperatures (SSTs) have been estimated fromplanktonic foraminiferal assemblages using the artificial neural networks method. Calcareous plankton varied dominantly on a glacial–interglacial scale as testified by the SST record, foraminiferal diversity, total coccolith abundance and changes in warm-water calcareous nannofossil taxa. A general increase in foraminiferal diversity and of total coccolith abundance is observed during interglacials.Warmest SSTs are reached during MIS 11, while MIS 12 and MIS 10 represent the coldest intervals of the studied record. During MIS 12, one of the most extreme glacials of the last million years, occurrence of Globorotalia inflata and of neogloboquadrinids indicates a shoaling of the interface between Atlantic inflowing and Mediterranean outflowing waters. Among calcareous nannofossils the distribution of Gephyrocapsa margereli–Gephyrocapsa muellerae N 4 μm also supports a reduced Atlantic–Mediterranean exchange during MIS 12. Superimposed on glacial–interglacial variability, six short-term coolings are recognized during MIS 12 and 10, which appear comparable in their distribution and amplitude to the Heinrich-type events documented in the Atlantic Ocean in the same interval. During these H-type events, Neogloboquadrina pachyderma (s) and G. margereli– G.muellerae N 4 μmincrease as a response to the enhanced inflow of cold Atlanticwater into theMediterranean via the Strait of Gibraltar. Mediterranean surfacewater hydrography appears to have beenmost severely affected at Termination V during the H-type event Ht4, possibly as a response to a large volume of Atlantic meltwater inflow via the Strait of Gibraltar and/or to freshwater/terrigenous input deriving from local ... |
author2 |
Girone, Angela Maiorano, Patrizia Marino, Maria Kucera, M. |
format |
Article in Journal/Newspaper |
author |
GIRONE, ANGELA MAIORANO, Patrizia MARINO, Maria Kucera M. |
spellingShingle |
GIRONE, ANGELA MAIORANO, Patrizia MARINO, Maria Kucera M. Calcareous plankton response to orbital and millennial-scale climate changes across the Middle Pleistocene in the western Mediterranean |
author_facet |
GIRONE, ANGELA MAIORANO, Patrizia MARINO, Maria Kucera M. |
author_sort |
GIRONE, ANGELA |
title |
Calcareous plankton response to orbital and millennial-scale climate changes across the Middle Pleistocene in the western Mediterranean |
title_short |
Calcareous plankton response to orbital and millennial-scale climate changes across the Middle Pleistocene in the western Mediterranean |
title_full |
Calcareous plankton response to orbital and millennial-scale climate changes across the Middle Pleistocene in the western Mediterranean |
title_fullStr |
Calcareous plankton response to orbital and millennial-scale climate changes across the Middle Pleistocene in the western Mediterranean |
title_full_unstemmed |
Calcareous plankton response to orbital and millennial-scale climate changes across the Middle Pleistocene in the western Mediterranean |
title_sort |
calcareous plankton response to orbital and millennial-scale climate changes across the middle pleistocene in the western mediterranean |
publishDate |
2013 |
url |
http://hdl.handle.net/11586/117616 https://doi.org/10.1016/j.palaeo.2013.09.005 |
genre |
Neogloboquadrina pachyderma |
genre_facet |
Neogloboquadrina pachyderma |
op_relation |
info:eu-repo/semantics/altIdentifier/wos/000330488400010 volume:392 firstpage:105 lastpage:116 numberofpages:12 journal:PALAEOGEOGRAPHY PALAEOCLIMATOLOGY PALAEOECOLOGY http://hdl.handle.net/11586/117616 doi:10.1016/j.palaeo.2013.09.005 info:eu-repo/semantics/altIdentifier/scopus/2-s2.0-84885110613 |
op_doi |
https://doi.org/10.1016/j.palaeo.2013.09.005 |
container_title |
Palaeogeography, Palaeoclimatology, Palaeoecology |
container_volume |
392 |
container_start_page |
105 |
op_container_end_page |
116 |
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1796313256822833152 |