Thirteen thousand years of southeastern Mediterranean climate variability inferred from an integrative planktic foraminiferal-based approach
International audience Over the past 13 ka, the hydrology for the southeastern Mediterranean was mainly regulated by Nile River runoff, which in turn was controlled by climate forcing. Being affected by orbital forcing, and the position of the Intertropical Convergence Zone (ITCZ), planktic foramini...
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ftunivangershal:oai:HAL:hal-01392637v1 2023-05-15T17:34:51+02:00 Thirteen thousand years of southeastern Mediterranean climate variability inferred from an integrative planktic foraminiferal-based approach Mojtahid, Meryem Manceau, R. Schiebel, Ralf Hennekam, R. de Lange, G.-J. Bio-Indicateurs Actuels et Fossiles (BIAF) Université d'Angers (UA) 2015 https://hal.science/hal-01392637 https://doi.org/10.1002/2014PA002705 en eng HAL CCSD American Geophysical Union info:eu-repo/semantics/altIdentifier/doi/10.1002/2014PA002705 hal-01392637 https://hal.science/hal-01392637 doi:10.1002/2014PA002705 OKINA: ua3965 ISSN: 0883-8305 Paleoceanography https://hal.science/hal-01392637 Paleoceanography, 2015, 4 (4), pp.402-422. ⟨10.1002/2014PA002705⟩ [SDE]Environmental Sciences info:eu-repo/semantics/article Journal articles 2015 ftunivangershal https://doi.org/10.1002/2014PA002705 2023-02-06T22:19:40Z International audience Over the past 13 ka, the hydrology for the southeastern Mediterranean was mainly regulated by Nile River runoff, which in turn was controlled by climate forcing. Being affected by orbital forcing, and the position of the Intertropical Convergence Zone (ITCZ), planktic foraminiferal data (assemblages, stable isotopes, and size properties) indicate three major periods. (1) From 13.0 to 11.5 ka, the upper water column was well-mixed, cold, and productive. (2) From 11.5 to 6.4 ka, hydrology and foraminifers were affected by intensified monsoonal circulation. The enhanced size of Globigerinoides ruber is interpreted as a response to environmental stress caused by low-saline waters. (3) After 6.4 ka, the southward retreat of the ITCZ caused a decrease in freshwater discharge and hence a return to ecological equilibrium. A drop in foraminifer diversity from 2.9 to 1.1 ka was related to more arid conditions, and limited supply of nutrients from the Nile River. We suggest a link to a negative North Atlantic Oscillation (NAO) marking the Roman Humid Period in the western Mediterranean, and in anti-phase with the southeastern Mediterranean aridity. Because Nile River runoff exerted major control on surface hydrology, a connection to Indian and Pacific climate systems partially controlling precipitation over the Nile catchment area is hypothesized. From 1.1 to 0.54 ka, high foraminifer diversity indicates humid conditions synchronous to the Medieval Climate Anomaly under a positive NAO state. Over the past 0.54 ka encompassing the Little Ice Age, another arid period is indicated by a drop in foraminifer diversity. Article in Journal/Newspaper North Atlantic North Atlantic oscillation Portail des publications scientifiques de l’Université d’Angers (HAL) Indian Pacific Paleoceanography 30 4 402 422 |
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Open Polar |
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Portail des publications scientifiques de l’Université d’Angers (HAL) |
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ftunivangershal |
language |
English |
topic |
[SDE]Environmental Sciences |
spellingShingle |
[SDE]Environmental Sciences Mojtahid, Meryem Manceau, R. Schiebel, Ralf Hennekam, R. de Lange, G.-J. Thirteen thousand years of southeastern Mediterranean climate variability inferred from an integrative planktic foraminiferal-based approach |
topic_facet |
[SDE]Environmental Sciences |
description |
International audience Over the past 13 ka, the hydrology for the southeastern Mediterranean was mainly regulated by Nile River runoff, which in turn was controlled by climate forcing. Being affected by orbital forcing, and the position of the Intertropical Convergence Zone (ITCZ), planktic foraminiferal data (assemblages, stable isotopes, and size properties) indicate three major periods. (1) From 13.0 to 11.5 ka, the upper water column was well-mixed, cold, and productive. (2) From 11.5 to 6.4 ka, hydrology and foraminifers were affected by intensified monsoonal circulation. The enhanced size of Globigerinoides ruber is interpreted as a response to environmental stress caused by low-saline waters. (3) After 6.4 ka, the southward retreat of the ITCZ caused a decrease in freshwater discharge and hence a return to ecological equilibrium. A drop in foraminifer diversity from 2.9 to 1.1 ka was related to more arid conditions, and limited supply of nutrients from the Nile River. We suggest a link to a negative North Atlantic Oscillation (NAO) marking the Roman Humid Period in the western Mediterranean, and in anti-phase with the southeastern Mediterranean aridity. Because Nile River runoff exerted major control on surface hydrology, a connection to Indian and Pacific climate systems partially controlling precipitation over the Nile catchment area is hypothesized. From 1.1 to 0.54 ka, high foraminifer diversity indicates humid conditions synchronous to the Medieval Climate Anomaly under a positive NAO state. Over the past 0.54 ka encompassing the Little Ice Age, another arid period is indicated by a drop in foraminifer diversity. |
author2 |
Bio-Indicateurs Actuels et Fossiles (BIAF) Université d'Angers (UA) |
format |
Article in Journal/Newspaper |
author |
Mojtahid, Meryem Manceau, R. Schiebel, Ralf Hennekam, R. de Lange, G.-J. |
author_facet |
Mojtahid, Meryem Manceau, R. Schiebel, Ralf Hennekam, R. de Lange, G.-J. |
author_sort |
Mojtahid, Meryem |
title |
Thirteen thousand years of southeastern Mediterranean climate variability inferred from an integrative planktic foraminiferal-based approach |
title_short |
Thirteen thousand years of southeastern Mediterranean climate variability inferred from an integrative planktic foraminiferal-based approach |
title_full |
Thirteen thousand years of southeastern Mediterranean climate variability inferred from an integrative planktic foraminiferal-based approach |
title_fullStr |
Thirteen thousand years of southeastern Mediterranean climate variability inferred from an integrative planktic foraminiferal-based approach |
title_full_unstemmed |
Thirteen thousand years of southeastern Mediterranean climate variability inferred from an integrative planktic foraminiferal-based approach |
title_sort |
thirteen thousand years of southeastern mediterranean climate variability inferred from an integrative planktic foraminiferal-based approach |
publisher |
HAL CCSD |
publishDate |
2015 |
url |
https://hal.science/hal-01392637 https://doi.org/10.1002/2014PA002705 |
geographic |
Indian Pacific |
geographic_facet |
Indian Pacific |
genre |
North Atlantic North Atlantic oscillation |
genre_facet |
North Atlantic North Atlantic oscillation |
op_source |
ISSN: 0883-8305 Paleoceanography https://hal.science/hal-01392637 Paleoceanography, 2015, 4 (4), pp.402-422. ⟨10.1002/2014PA002705⟩ |
op_relation |
info:eu-repo/semantics/altIdentifier/doi/10.1002/2014PA002705 hal-01392637 https://hal.science/hal-01392637 doi:10.1002/2014PA002705 OKINA: ua3965 |
op_doi |
https://doi.org/10.1002/2014PA002705 |
container_title |
Paleoceanography |
container_volume |
30 |
container_issue |
4 |
container_start_page |
402 |
op_container_end_page |
422 |
_version_ |
1766133808725229568 |