Please use this identifier to cite or link to this item: http://hdl.handle.net/2445/98362
Title: Impact of iceberg melting on Mediterranean thermohaline circulation during Heinrich events
Author: Sierro Sánchez, Francisco Javier
Hodell, D.A.
Curtis, J.H.
Flores Villarejo, José Abel
Reguera, I.
Colmenero-Hidalgo, E.
Bárcena, M.A.
Grimalt Obrador, Joan
Cacho Lascorz, Isabel
Frigola Ferrer, Jaime I.
Canals Artigas, Miquel
Keywords: Paleoclimatologia
Paleoceanografia
Mediterrània (Mar)
Icebergs
Plistocè
Paleoclimatology
Paleoceanography
Mediterranean Sea
Icebergs
Pleistocene
Issue Date: Jun-2005
Publisher: American Geophysical Union
Abstract: Down-core samples of planktonic and benthic foraminifera were analyzed for oxygen and carbon isotopes in International Marine Past Global Changes Study (IMAGES) core MD99-2343 in order to study the interactions between climate change in the Northern Hemisphere and the western Mediterranean thermohaline circulation at times of Heinrich events (HE). Our results confirm the antiphase correlation between enhanced North Atlantic Deep Water formation and low ventilation in the Mediterranean. However, this study reveals that this antiphase relationship in deepwater formation between the North Atlantic and Mediterranean was interrupted during times of HE when the injection of large volumes of water from melting icebergs reached the entrance to the Mediterranean. These events, which lasted less than 1000 years, are represented by pronounced decreases in both planktonic d18O and benthic d13C signals. Lower salinities of Mediterranean surface water resulted in a slowdown of western Mediterranean deepwater overturn even though cold sea surface temperatures and drier climate should have resulted in enhanced deepwater formation.
Note: Reproducció del document publicat a: http://dx.doi.org/10.1029/2004PA001051
It is part of: Paleoceanography, 2005, vol. 20, num. 2, p. 1-13
Related resource: http://dx.doi.org/10.1029/2004PA001051
URI: http://hdl.handle.net/2445/98362
ISSN: 0883-8305
Appears in Collections:Articles publicats en revistes (Dinàmica de la Terra i l'Oceà)

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