A multiproxy study combining calcareous plankton assemblages (coccolithophore and planktonic foraminifera), terrestrial (n-alkanes) and marine (alkenones) biomarkers was carried out in a sediment core (ND14Q-AR2) from the South Adriatic Sea. The focus of the study is to investigate millennial-to-centennial scale climate variability in the Eastern Mediterranean during the last deglaciation, between 20 and 11 ka BP. The high-resolution recon-struction allows for the characterization of the impact of the Heinrich Stadial 1 (HS1, here identified between 17.1 and 14.9 ka BP) at a centennial/multi-decadal time scale resolution. Based on terrestrial proxies, the HS1 interval has a two-fold partition: HS1a (17.1-15.9 ka BP), characterized by decreasing temperatures and relative high humidity, and HS1b (15.9-14.9 ka BP), characterized by the coldest temperatures and drier conditions on land. Terrestrial proxies suggest changes in moisture availability on land and ice melting delivery from the Alps during HS1. This period is followed by the Bolling-Allerod record (B-A, 14.9-12.3 ka BP) indicating ameliorated climate conditions and distinct local hydrological signals, related to global melt events similar to the Melt Water Pulse-1A. Finally, the comparison of our results with other Northern Hemisphere climatic records shows a good correspondence between the temperature variations in the South Adriatic Sea and the Greenland ice core oxygen isotope record, highlighting the climatic response of the South Adriatic to global climate variations. Comparison with other Mediterranean paleoclimatic records suggests a two-steps reorganization of the ocean/atmospheric circulation during the HS1 in the mid-and low-latitudes during the HS1 interval, but also a connection with the tropical Northern Hemisphere climate.

Climate evolution in the Adriatic Sea across the last deglaciation. A multiproxy approach combining biomarkers and calcareous plankton / Bazzicalupo, P.; Sicre, M. -A.; Checa, H.; Maiorano, P.; Margaritelli, G.; Klein, V.; Pena, L. D.; Cacho, I.; Frigola, J.; Bonomo, S.; Cascella, A.; Lirer, F.. - In: PALAEOGEOGRAPHY PALAEOCLIMATOLOGY PALAEOECOLOGY. - ISSN 0031-0182. - 608:(2022). [10.1016/j.palaeo.2022.111291]

Climate evolution in the Adriatic Sea across the last deglaciation. A multiproxy approach combining biomarkers and calcareous plankton

Lirer F.
2022

Abstract

A multiproxy study combining calcareous plankton assemblages (coccolithophore and planktonic foraminifera), terrestrial (n-alkanes) and marine (alkenones) biomarkers was carried out in a sediment core (ND14Q-AR2) from the South Adriatic Sea. The focus of the study is to investigate millennial-to-centennial scale climate variability in the Eastern Mediterranean during the last deglaciation, between 20 and 11 ka BP. The high-resolution recon-struction allows for the characterization of the impact of the Heinrich Stadial 1 (HS1, here identified between 17.1 and 14.9 ka BP) at a centennial/multi-decadal time scale resolution. Based on terrestrial proxies, the HS1 interval has a two-fold partition: HS1a (17.1-15.9 ka BP), characterized by decreasing temperatures and relative high humidity, and HS1b (15.9-14.9 ka BP), characterized by the coldest temperatures and drier conditions on land. Terrestrial proxies suggest changes in moisture availability on land and ice melting delivery from the Alps during HS1. This period is followed by the Bolling-Allerod record (B-A, 14.9-12.3 ka BP) indicating ameliorated climate conditions and distinct local hydrological signals, related to global melt events similar to the Melt Water Pulse-1A. Finally, the comparison of our results with other Northern Hemisphere climatic records shows a good correspondence between the temperature variations in the South Adriatic Sea and the Greenland ice core oxygen isotope record, highlighting the climatic response of the South Adriatic to global climate variations. Comparison with other Mediterranean paleoclimatic records suggests a two-steps reorganization of the ocean/atmospheric circulation during the HS1 in the mid-and low-latitudes during the HS1 interval, but also a connection with the tropical Northern Hemisphere climate.
2022
Deglaciation; Heinrich Stadial 1; Adriatic Sea; Terrestrial and marine biomarkers; Calcareous plankton; Climate forcing
01 Pubblicazione su rivista::01a Articolo in rivista
Climate evolution in the Adriatic Sea across the last deglaciation. A multiproxy approach combining biomarkers and calcareous plankton / Bazzicalupo, P.; Sicre, M. -A.; Checa, H.; Maiorano, P.; Margaritelli, G.; Klein, V.; Pena, L. D.; Cacho, I.; Frigola, J.; Bonomo, S.; Cascella, A.; Lirer, F.. - In: PALAEOGEOGRAPHY PALAEOCLIMATOLOGY PALAEOECOLOGY. - ISSN 0031-0182. - 608:(2022). [10.1016/j.palaeo.2022.111291]
File allegati a questo prodotto
File Dimensione Formato  
Bazzicalupo_Climate_2022.pdf

solo gestori archivio

Tipologia: Versione editoriale (versione pubblicata con il layout dell'editore)
Licenza: Tutti i diritti riservati (All rights reserved)
Dimensione 4.11 MB
Formato Adobe PDF
4.11 MB Adobe PDF   Contatta l'autore

I documenti in IRIS sono protetti da copyright e tutti i diritti sono riservati, salvo diversa indicazione.

Utilizza questo identificativo per citare o creare un link a questo documento: https://hdl.handle.net/11573/1680548
Citazioni
  • ???jsp.display-item.citation.pmc??? ND
  • Scopus 2
  • ???jsp.display-item.citation.isi??? 1
social impact