Abrupt cold spells in the northwest Mediterranean

Rohling, Eelco J.; Hayes, A.; Rijk, Sacha de; Kroon, Dirk; Zachariasse, Willem-Jan; Eisma, D.

doi:10.1029/98pa00671

Cited by 110 publications

(75 citation statements)

References 38 publications

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“…In any case, the concomitant peak abundances of these species may indicate that winter cooling and deep mixing were at a maximum. Such a scenario would be in analogy with Late Pleistocene peak abundances of left-coiling N. pachyderma found in cores from the Gulf of Lions during Heinrich events (Rohling et al, 1998). Within MIS100, the severe winter cooling conditions coincide with the stadial phases and with interstadial MIS100.3.…”

Section: Changes In Mediterranean Thermohaline Circulationmentioning

confidence: 99%

Late Pliocene climate variability on Milankovitch to millennial time scales: A high-resolution study of MIS100 from the Mediterranean

Becker

Lourens

Hilgen

et al. 2005

Palaeogeography, Palaeoclimatology, Palaeoecology

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Astronomically tuned high-resolution climatic proxy records across marine oxygen isotope stage 100 (MIS100) from the Italian Monte San Nicola section and ODP Leg 160 Hole 967A are presented. These records reveal a complex pattern of climate fluctuations on both Milankovitch and sub-Milankovitch timescales that oppose or reinforce one another. Planktonic and benthic foraminiferal d18 O records of San Nicola depict distinct stadial and interstadial phases superimposed on the saw-tooth pattern of this glacial stage. The duration of the stadial-interstadial alterations closely resembles that of the Late Pleistocene Bond cycles. In addition, both isotopic and foraminiferal records of San Nicola reflect rapid changes on timescales comparable to that of the Dansgard-Oeschger (D-O) cycles of the Late Pleistocene. During stadial intervals winter surface cooling and deep convection in the Mediterranean appeared to be more intense, probably as a consequence of very cold winds entering the Mediterranean from the Atlantic or the European continent.The high-frequency climate variability is less clear at Site 967, indicating that the eastern Mediterranean was probably less sensitive to surface water cooling and the influence of the Atlantic climate system. Concomitant changes in the colour reflectance of ODP Site 967 and the calcium carbonate record of San Nicola probably indicate that part of the high-frequency climate variability (3-5 kyr) in the eastern Mediterranean is related to changes in Saharan dust supply. Evidently, enhanced dust deposition in the Mediterranean correlates with the cold intervals of the millennial-scale D-O oscillations suggesting that the Atlantic pressure system may have played a critical role in varying the wind strength and/or aridification of northern Africa. D

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Section: Changes In Mediterranean Thermohaline Circulationmentioning

confidence: 99%

Late Pliocene climate variability on Milankovitch to millennial time scales: A high-resolution study of MIS100 from the Mediterranean

Becker

Lourens

Hilgen

et al. 2005

Palaeogeography, Palaeoclimatology, Palaeoecology

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“…The peak to peak synchronization between Greenland ice core and Mediterranean suborbital climatic fluctuations is justified by teleconnection phenomena [7,8,57]. Cacho et al [7] developed two alternative age models for the last 50 kyr in the Alboran Sea, respectively based on calibrated radiocarbon datings and synchronization of alkenone-based sea surface temperatures with 18 O data from Greenland ice cores, which are remarkably in agreement.…”

Section: Chronological Frameworkmentioning

confidence: 52%

Ten Years of Paleoceanographic Studies at ODP Site 963 (Central Mediterranean Sea)

Stefano

Incarbona

Sprovieri³

et al. 2014

TOPALOJ

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Abstract:The geographical location, the shape and the circulation pattern makes the Mediterranean Sea an ideal laboratory to study the interplay between different climatic systems, abrupt climate changes and the response of marine ecosystems. The Ocean Drilling Program Site 963 was drilled in the Northwestern part of the Sicily Channel, the sill that divides the western from the eastern Mediterranean Sea. Numerous papers have been published on Site 963 sediments in the last decade, investigating Mediterranean paleoceanographic themes. Here we offer a synthetic framework of these investigations carried out by sub-centennial resolution. We present the whole sequence of suborbital climatic oscillations over the last 130 kyr, that is since the last interglacial period, and we claim that teleconnection with Greenland and North Atlantic regions is the most likely phenomenon to explain our results. Furthermore we show the high sensitivity of marine planktonic (planktonic foraminifera and coccolithophores) ecosystems to Stadial/Interstadial fluctuations. We conclude that a three-steps scenario may describe productivity variations during each high-frequency oscillation, from Interstadial 24 to the last deglaciation (from 110 to 15 kiloyears ago): surface oligotrophy and a deep nutricline in the lower part of Interstadials; increased productivity, through a deep chlorophyll maximum and winter/spring coccolithophore blooms, during the upper part of Interstadials; a shallow nutricline during Stadials and possibly reduced productivity levels with respect to the upper Interstadial phase. Results from Site 963 investigations provide key information for very highresolution paleoceanographic research in the Mediterranean Sea.

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“…Teleconnection phenomena between the Mediterranean and the Greenland/North Atlantic region are documented for the late Quaternary (e.g. Rohling et al, 1998;Cacho et al, 1999;Sbaffi et al, 2001;Rohling et al, 2002b;Sprovieri et al, 2003;Martrat et al, 2004;Pérez-Folgado et al, 2004;Sprovieri et al, 2006;Incarbona et al, 2008a). This connection has been explained by variations in North Atlantic Deep Water formation rate, as modelling experiments suggest that this mechanism is able to cause coherent temperature changes in the two regions (e.g.…”

Section: The Influence Of the North Atlantic Climate System And Of Thmentioning

confidence: 92%

“…Green, black and red curves indicate confidence levels at respectively 95, 90 and 85%. (Rohling et al, 1998;Cacho et al, 1999;Pérez-Folgado et al, 2003;Sierro et al, 2005), and interpreted as the entrance of this species into the Mediterranean Sea during the southward shift of the Polar Front in the North Atlantic during the slow-down of North Atlantic Deep Water (NADW) formation. We argue that the lower abundance of N. pachyderma sx in both the eastern and the western Mediterranean Sea after the MPT is paradoxical, since colder conditions and a much thicker ice accumulation in Greenland and Antarctica sheets are documented (Lisiecki and Raymo, 2005).…”

Section: The Distribution Of N Pachyderma Sxmentioning

confidence: 99%

Orbital variations in planktonic foraminifera assemblages from the Ionian Sea during the Middle Pleistocene Transition

Incarbona

Dinarès-Turell

Stefano

et al. 2013

Palaeogeography, Palaeoclimatology, Palaeoecology

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The Middle Pleistocene Transition (1.2-0.7 Ma) is the most recent re-organization of the global climate system which includes variations in the frequency and amplitude of glacial/interglacial cycles, increased ice sheet volume, sea surface temperature cooling and a significant drop in the CO 2 atmospheric levels. Here we present high-resolution planktonic foraminifera data (mean sampling resolution of about 780 years) from core LC10 recovered in the Ionian Sea (eastern Mediterranean), between 1.2 and 0.9 Ma. Selected taxa, among them G. ruber, T. quinqueloba and G. bulloides, show significant periodicities that can be associated to orbital cycles, mainly precession and obliquity. The planktonic foraminifera based paleoclimatic curve exhibits a cooling linear trend that can be associated to similar phenomena observed in the North Atlantic. On the other hand, we refer to the influence of the North African Monsoon the occurrence of two peaks of the low-salinity tolerant species G. quadrilobatus that fall in coincidence of sapropel layers. Finally, we discuss the distribution pattern of N. pachyderma sinistral coiling, with peaks up to about 20% between MIS 30 and 28, and compare it to middle-late Quaternary records of the Sicily Channel and western Mediterranean.

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Abrupt cold spells in the northwest Mediterranean

Cited by 110 publications

References 38 publications

Late Pliocene climate variability on Milankovitch to millennial time scales: A high-resolution study of MIS100 from the Mediterranean

Late Pliocene climate variability on Milankovitch to millennial time scales: A high-resolution study of MIS100 from the Mediterranean

Ten Years of Paleoceanographic Studies at ODP Site 963 (Central Mediterranean Sea)

Orbital variations in planktonic foraminifera assemblages from the Ionian Sea during the Middle Pleistocene Transition

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