African monsoon variability during the previous interglacial maximum

Rohling, Eelco J.; Cane, Tim; Cooke, Steven J.; Sprovieri, Mario; Bouloubassi, Ioanna; Emeis, Kay–Christian; Schiebel, Ralf; Kroon, Dick; Jorissen, Frans; Lorre, Anne; Kemp, Alan E. S.

doi:10.1016/s0012-821x(02)00775-6

Cited by 284 publications

(248 citation statements)

References 65 publications

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“…flooding into the basin from the Nile and other (now dry) North African river systems (e.g., Rohling et al, 2002Rohling et al, , 2004Rohling et al, , 2014Rohling et al, , 2015Larrasoaña et al, 2003;Scrivner et al, 2004;Osborne et al, 2008;Hennekam, 2015). Such times are identified in Mediterranean sediment cores based on sharply delineated intervals of low surface-water oxygen isotope (d 18 O) anomalies (Fig.…”

Section: Denton and Hughes 2002mentioning

confidence: 99%

“…Good signal agreement exists between the Mediterranean and Red Sea records, except during the sharply delineated Mediterranean sapropel intervals. In those intervals, freshwater-induced low-d 18 O surface-water conditions (e.g., Rohling et al, 2002Rohling et al, , 2004 yield spurious (high) sealevel extremes in the Mediterranean reconstruction ( Fig. 2b and Fig.…”

Section: Denton and Hughes 2002mentioning

confidence: 99%

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Differences between the last two glacial maxima and implications for ice-sheet, δ18O, and sea-level reconstructions

Rohling

Hibbert

Williams

et al. 2017

Quaternary Science Reviews

115

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Arctic ice shelf Last Interglacial Glacioisostatic adjustment a b s t r a c t Studies of past glacial cycles yield critical information about climate and sea-level (ice-volume) variability, including the sensitivity of climate to radiative change, and impacts of crustal rebound on sealevel reconstructions for past interglacials. Here we identify significant differences between the last and penultimate glacial maxima (LGM and PGM) in terms of global volume and distribution of land ice, despite similar temperatures and radiative forcing. Our analysis challenges conventional views of relationships between global ice volume, sea level, seawater oxygen isotope values, and deep-sea temperature, and supports the potential presence of large floating Arctic ice shelves during the PGM. The existence of different glacial 'modes' calls for focussed research on the complex processes behind ice-age development. We present a glacioisostatic assessment to demonstrate how a different PGM ice-sheet configuration might affect sea-level estimates for the last interglacial. Results suggest that this may alter existing last interglacial sea-level estimates, which often use an LGM-like ice configuration, by several metres (likely upward).

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Section: Denton and Hughes 2002mentioning

confidence: 99%

Section: Denton and Hughes 2002mentioning

confidence: 99%

Differences between the last two glacial maxima and implications for ice-sheet, δ18O, and sea-level reconstructions

Rohling

Hibbert

Williams

et al. 2017

Quaternary Science Reviews

115

View full text Add to dashboard Cite

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“…Several hypotheses have been formulated for the development of bottom anoxia in the Eastern Mediterranean Sea, mainly linked to higher productivity levels and the weakening/interruption of deep water formation (Rohling, 1994;Cramp and O'Sullivan, 1999). In any case, the exceptional African Monsoon activity, and the consequent strong Nile (and other presently buried North African) river runoff, was a prime forcing factor of this phenomenon (Rossignol-Strick, 1983, 1985Hilgen, 1991;Lourens et al, 1996;Rohling et al, 2002aRohling et al, , 2004Marino et al, 2007Marino et al, , 2009). Thus, the two peaks of G. quadrilobatus may be an indirect response to the tropical climate influence.…”

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

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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“…Currently, nutricline dynamics and paleoproductivity levels [2][3][4] and the impact of increased monsoon activity and runoff from North African rivers that may have caused the failure of deep water formation [5,6] are among the most important topics to understand the origin of sapropels.…”

Section: Introductionmentioning

confidence: 99%

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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African monsoon variability during the previous interglacial maximum

Cited by 284 publications

References 65 publications

Differences between the last two glacial maxima and implications for ice-sheet, δ18O, and sea-level reconstructions

Differences between the last two glacial maxima and implications for ice-sheet, δ18O, and sea-level reconstructions

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

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

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