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Impact of Lateglacial cold events on the northern Aegean region reconstructed from marine and terrestrial proxy data

Impact of Lateglacial cold events on the northern Aegean region reconstructed from marine and terrestrial proxy data
Impact of Lateglacial cold events on the northern Aegean region reconstructed from marine and terrestrial proxy data
Marine palynomorph data paired with other indicators of sea-surface hydrography (planktic foraminiferal assemblages and oxygen isotopes) were used to decipher the impact of cold events on the northern Aegean region during the last glacial to interglacial transition. The data, which were derived from marine sediment cores GeoTü SL152 and GeoTü SL148, point to a strong impact of the Heinrich 1 and Younger Dryas cold events on surface-water conditions in the northern Aegean Sea. Shifts in marine palynomorph assemblages correlate with changes in terrestrial vegetation and climate (i.e. precipitation and temperature reconstructions based on pollen assemblages) in the northern borderlands of the Aegean Sea. The climate responses of the Aegean region to Heinrich event 1 (H1, ca. 17.5 to ca. 15.7?cal ka BP) and Younger Dryas (ca. 12.6 to ca. 11.7?cal ka BP) events appear similar in magnitude (with mean annual temperatures between ?6 and 10°C and mean annual precipitation between ?300 and ?450?mm). However, the annual temperature decline during the H1 relative to the preceding already cold conditions was minor (<3°C). The transition from the relatively warm and humid local equivalent of the Allerød interstadial to the Younger Dryas, on the other hand, witnessed an annual temperature decline of 6°C and an annual precipitation decrease of 300?mm, the latter occurring abruptly within only ca. 150 a. The return to warmer conditions in the northern Aegean region after the Younger Dryas was completed at ca. 11.6?cal ka BP.
0267-8179
86-96
Kotthoff, Ulrich
162825b4-f0be-431b-a4ac-d6a7bb32293a
Koutsodendris, Andreas
254fb48d-9fa7-48ec-a7b3-0063714158e3
Pross, Jörg
7c848424-852f-467b-90f0-19d4f8d4ae01
Schmiedl, Gerhard
bb0f2d73-dd05-4624-b590-497a224fd6ae
Bornemann, André
57f1da93-2b5f-4f6d-a0b6-2ce8cd918d89
Kaul, Christian
2befaecc-5f4a-4c91-b499-367ec3efbb5a
Marino, Gianluca
40d6f3f2-0905-4c0f-8eb9-6d577b2833bb
Peyron, Odile
75c0a488-521c-439d-ae84-766b3603d3db
Schiebel, Ralf
5c48accb-ee14-471a-801f-4267d8e4b2e1
Kotthoff, Ulrich
162825b4-f0be-431b-a4ac-d6a7bb32293a
Koutsodendris, Andreas
254fb48d-9fa7-48ec-a7b3-0063714158e3
Pross, Jörg
7c848424-852f-467b-90f0-19d4f8d4ae01
Schmiedl, Gerhard
bb0f2d73-dd05-4624-b590-497a224fd6ae
Bornemann, André
57f1da93-2b5f-4f6d-a0b6-2ce8cd918d89
Kaul, Christian
2befaecc-5f4a-4c91-b499-367ec3efbb5a
Marino, Gianluca
40d6f3f2-0905-4c0f-8eb9-6d577b2833bb
Peyron, Odile
75c0a488-521c-439d-ae84-766b3603d3db
Schiebel, Ralf
5c48accb-ee14-471a-801f-4267d8e4b2e1

Kotthoff, Ulrich, Koutsodendris, Andreas, Pross, Jörg, Schmiedl, Gerhard, Bornemann, André, Kaul, Christian, Marino, Gianluca, Peyron, Odile and Schiebel, Ralf (2011) Impact of Lateglacial cold events on the northern Aegean region reconstructed from marine and terrestrial proxy data. Journal of Quaternary Science, 26 (1), 86-96. (doi:10.1002/jqs.1430).

Record type: Article

Abstract

Marine palynomorph data paired with other indicators of sea-surface hydrography (planktic foraminiferal assemblages and oxygen isotopes) were used to decipher the impact of cold events on the northern Aegean region during the last glacial to interglacial transition. The data, which were derived from marine sediment cores GeoTü SL152 and GeoTü SL148, point to a strong impact of the Heinrich 1 and Younger Dryas cold events on surface-water conditions in the northern Aegean Sea. Shifts in marine palynomorph assemblages correlate with changes in terrestrial vegetation and climate (i.e. precipitation and temperature reconstructions based on pollen assemblages) in the northern borderlands of the Aegean Sea. The climate responses of the Aegean region to Heinrich event 1 (H1, ca. 17.5 to ca. 15.7?cal ka BP) and Younger Dryas (ca. 12.6 to ca. 11.7?cal ka BP) events appear similar in magnitude (with mean annual temperatures between ?6 and 10°C and mean annual precipitation between ?300 and ?450?mm). However, the annual temperature decline during the H1 relative to the preceding already cold conditions was minor (<3°C). The transition from the relatively warm and humid local equivalent of the Allerød interstadial to the Younger Dryas, on the other hand, witnessed an annual temperature decline of 6°C and an annual precipitation decrease of 300?mm, the latter occurring abruptly within only ca. 150 a. The return to warmer conditions in the northern Aegean region after the Younger Dryas was completed at ca. 11.6?cal ka BP.

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Published date: January 2011

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Local EPrints ID: 179291
URI: http://eprints.soton.ac.uk/id/eprint/179291
ISSN: 0267-8179
PURE UUID: ec91ee4d-25d9-4ecf-b033-4d2096a48d7b

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Date deposited: 31 Mar 2011 13:16
Last modified: 16 Jul 2019 23:43

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Author: Ulrich Kotthoff
Author: Andreas Koutsodendris
Author: Jörg Pross
Author: Gerhard Schmiedl
Author: André Bornemann
Author: Christian Kaul
Author: Gianluca Marino
Author: Odile Peyron
Author: Ralf Schiebel

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