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Eastern Mediterranean Sea during the Last Glacial Maximum; an 18,000-years B.P. Reconstruction

Published online by Cambridge University Press:  20 January 2017

Robert C. Thunell
Robert C. Thunell*
Affiliation:
CLIMAP, Graduate School of Oceanography, University of Rhode Island, Kingston, Rhode Island 02881 USA
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Abstract

An ecological transfer function based on the distribution of planktonic foraminifera in 66 Mediterranean and 8 North Atlantic surface-sediment samples is used to estimate sea-surface temperatures and salinities for the eastern Mediterranean during the last glacial maximum (18,000 yr B.P.). The present-day distribution of planktonic foraminifera can be explained by four faunal assemblages, each of which has diagnostic environmental preferences. Factor 1 is a tropical-subtropical assemblage; factor 2 is a transitional assemblage; factor 3 is a low-salinity assemblage; and factor 4 is a subpolar assemblage. The geographic distribution of these faunal assemblages reflect the variation in overlying hydrographic conditions. The 18,000-yr B.P. samples were selected based on total faunal stratigraphy, oxygen-isotope stratigraphy, and previously determined radiometric dates for eastern Mediterranean volcanic ash layers. Estimated temperature and salinity patterns show that the greatest change between present-day and 18,000-yr B.P. sea-surface conditions existed in the Aegean Sea and immediately south of Crete. The winter temperature anomaly (18,000 yr B.P.-present) within the Aegean Sea is 6°C cooler than present. In contrast to this, the maximum summer temperature anomaly exists to the south of Crete, where sea-surface temperatures were 4°C cooler than present. Estimated sea-surface salinities also show that the greatest change took place within the Aegean Sea, being 5‰ less saline than present. The estimated temperature and salinity patterns seem to reflect changing drainage patterns during glacial times and the diversion of cool, low-salinity water into the Aegean Sea. The source of this glacial runoff appears to be large freshwater lakes that existed during this time over parts of eastern Europe and western Siberia.

Type
Original Articles
Information
Quaternary Research , Volume 11 , Issue 3 , May 1979 , pp. 353 - 372
Copyright
University of Washington

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References

Bé, A.W.H., Tolderlund, D.S., é and Tolderlund, 1971. Distribution and ecology of living planktonic foraminifera in surface waters of the Atlantic and Indian Ocean. Funnel, B.M., Riedel, W.R., The Micropaleontology of the Oceans. Cambridge University Press, London, 105-149.Google Scholar
Blanc, F., Blanc-Vernet, L., Laurec, A., LeCampion, J., Pastouret, L., (1975). Application paleoecologique de la methode d'analyse factorielle en composantes principales: Interpretation des microfaunes de foraminiferes Quaternaires en Mediterranee. II Etude des especes de Mediterranee Orientale. Paleogeography, Paleoclimatology, and Paleoecology. 18, 293-312.Google Scholar
Bruns, E., (1958) Ozeanologie. Vol. 2, Deutscher Verlag, Berlin. Google Scholar
Cita, M.B., Chierici, M.A., Ciampo, G., Zei, M., d'Onofrio, S., Ryan, W.B.F., Scorziello, R., (1973). The Quaternary record in the Tyrrhenian and Ionian Basins of the Mediterranean Sea. Ryan, W.B.F., Hsu, K.J., Initial Reports of the Deep-Sea Drilling Project. Vol. 13, 1263-1339 Washington, D.C..Google Scholar
Cita, M.B., Vergnaud-Grazzini, C., Robert, C., Chamley, H., Ciaranfi, N., d'Onofrio, S., (1977). Paleoclimatic record of a long deep sea core from the eastern Mediterranean. Quaternary Research. 8, 205-235.CrossRefGoogle Scholar
1976. CLIMAP Project Members. The surface of the ice-age earth. Science. 191, 1131-1137.Google Scholar
Cline, R.M., Hays, J.D., (1976). Investigation of Late Quaternary paleoceanography and paleoclimatology. Geological Society of America Memoir. 145.Google Scholar
Farrand, W.R., (1971). Late Quaternary paleoclimates of the eastern Mediterranean area. Turekian, K.K., The Late Cenozoic Glacial Ages. Yale University Press, New Haven, 199-214.Google Scholar
Federman, A., (1978). Abyssal Tephra Layers in the Eastern Mediterranean and the Soctia Sea. Unpublished Masters Thesis. University of Rhode Island. Google Scholar
Gerasimov, J.P., (1973). Chernozens, buried soils and loesses of the Russian plain: Their age and genesis. Soil Science. 16, 202-210.Google Scholar
Grosswald, M.G., (1977). Late-Wurmian ice sheet on the continental shelf of northern Eurasia. X INQUA Congress Abstracts. 184.Google Scholar
Gunther, D., Pichler, H., (1973). Die obere und untere Bimssteinfolge auf Santorini. Neues Jahrbuch fuer Mineralogie, Geologie, und Palaeontologie Referate. 394-415.Google Scholar
Herman, Y., (1972). Quaternary eastern Mediterranean sediments: micropaleontology and climatic record. Stanley, D.J., The Mediterranean Sea: A Natural Sedimentation Laboratory. Dowden, Hutchinson and Ross, Inc, Stroudsburg, Pa, 129-147.Google Scholar
Hopkins, T.S., (1978). Physical processes in the Mediterranean basins. Kjerfve, B., Estuarine Transport Processes. University of South Carolina Press, Columbia, 269-310.Google Scholar
Hughes, T., Denton, G.H., Grosswald, M.G., (1977). Was there a late-Wurm Arctic ice-sheet?. Nature (London). 266, 596-602.CrossRefGoogle Scholar
Imbrie, J., Kipp, N.G., (1971). A new micropaleontological method for quantitative paleoclimatology: Application to a late Pleistocene Caribbean core. Turekian, K.K., The Late Cenozoic Glacial Ages. Yale University Press, New Haven, 71-181.Google Scholar
Imbrie, J., van Donk, J., Kipp, N.G., (1973). Paleoclimatic investigations of a late Pleistocene Caribbean deep-sea core: Comparison of isotopic and faunal methods. Quaternary Research. 3, 10-38.Google Scholar
Keller, J., Ninkovich, D., (1972). Tephra-lagen in der Agais. Zeitschrift der Deutschen Geologischen Gesellschaft. 123, 579-587.Google Scholar
Kipp, N.G., (1976). New transfer function for estimating past sea-surface conditions from sea-bed distribution of planktonic foraminiferal assemblages in the North Atlantic. Cline, R.M., Hays, J.D., Investigations of Late Quaternary Paleoceanography and Paleoclimatology. Geological Society of America Memoir. 145, 3-41.Google Scholar
Kukla, G.J., (1977). Pleistocene land-sea correlations. 1. Europe. Earth-Science Reviews. 13, 307-374.Google Scholar
Kullenberg, B., (1952). On the salinity of the water contained in marine sediments. Meddelanden fran Oceanografiska Institutet i Goteborg. 21, 1-38.Google Scholar
Lacombe, H., Tchernia, P., (1972). Caracteres hydrologiques et circulation des eaux en Mediterranee. Stanley, D.J., The Mediterranean Sea. Dowden, Hutchinson, and Ross, Inc, Stroudsburg, Pa, 129-147.Google Scholar
Loubere, P., (1977). The sediment surface distribution of foraminifera and indicators of western Mediterranean oceanography for the present day and for the last glacial maximum, 18,000 years B.P.. Geological Society of America Annual Meeting, Abstracts with Programs. Vol. 9, 1074.Google Scholar
Luz, B., Bernstein, M., (1977). Planktonic formaminifera and quantitative paleoclimatology of the eastern Mediterranean. Marine Micropaleontology. 1, 307-323.CrossRefGoogle Scholar
Luz, B., Bernstein, M., (1978). Paleotemperatures of the eastern Mediterranean in the late Quaternary. Abstract, Tenth International Congress on Sedimentology. Jerusalem .Google Scholar
Malmgren, B., Kennett, J.P., (1976). Principal component analysis of Quaternary planktonic foraminifera in the Gulf of Mexico: Paleoclimatic applications. Marine Micropaleontology. 1, 299-306.Google Scholar
Manabe, S., Hahn, D.G., (1977). Simulation of the tropical climate of an Ice Age. Journal of Geophysical Research. 82, 3889-3911.Google Scholar
Olausson, E., (1961). Studies of deep-sea cores. Reports of the Swedish Deep Sea Expedition, 1947–1948. Vol. 8, 353-391.Google Scholar
Parker, F.L., (1955). Distribution of planktonic foraminifera in some Mediterranean sediments. Papers in Marine Biology and Oceanography. 204-211.Google Scholar
Parker, F.L., (1958). Eastern Mediterranean foraminifera. Reports of the Swedish Deep-Sea Expedition, 1947–1948. Vol. 4, 217-283.Google Scholar
Parker, F.L., (1962). Planktonic foraminiferal species in Pacific sediments. Micropaleontology. 219-254.CrossRefGoogle Scholar
Pastouret, L., (1970). Etude sedimentologique et paleoclimatique de carottes preleve es en Mediterranee orientale. Tethys. 2, 227-266.Google Scholar
Pichler, H., Friedrich, W., (1976). Radiocarbon dates of Santorini volcanics. Nature (London). 262, 373-374.CrossRefGoogle Scholar
Pickard, G.L., (1963) Descriptive Physical Oceanography. Pergamon Press, Oxford. Google Scholar
Rognon, P., Williams, M.A.J., (1977). Late Quaternary climatic changes in Australia and North Africa: A preliminary interpretation. Paleogeography, Paleoclimatology, and Paleoecology. 21, 285-327.CrossRefGoogle Scholar
Ruddiman, W.F., (1971). Pleistocene sedimentation in the equatorial Atlantic—Stratigraphy and faunal paleoclimatology. Geological Society of American Bulletin. 82, 283-302.Google Scholar
Ryan, W.B.F., (1972). Stratigraphy of Late Quaternary sediments in the eastern Mediterranean. Stanley, D.J., The Mediterranean Sea: A Natural Sedimentation Laboratory. Dowden. Hutchinson and Ross, Inc, Stroudsburg, Pa, 149-169.Google Scholar
Thiede, J., (1977). A glacial Mediterranean. Geological Society of America Annual Meeting Abstracts with Programs. Vol. 9, 1198.Google Scholar
Thunell, R.C., (1976). Calcium carbonate dissolution history in late Quaternary deep-sea sediments western Gulf of Mexico. Quaternary Research. 6, 281-297.Google Scholar
Thunell, R.C., Williams, D.F., Kennett, J.P., (1977). Late Quaternary paleoclimatology, stratigraphy and sapropel history in eastern Mediterranean deep-sea sediments. Marine Micropaleontology. 2, 371-388.Google Scholar
Todd, R., (1958). Foraminifera from western Mediterranean deep-sea cores. Reports of the Swedish Deep Sea Expedition, 1947–1948. Vol. 8, 169-217.Google Scholar
Tsereteli, D.195., (1973). Premises to paleogeographic changes in the Caucases during the Pleistocene. 9th Congress INQUA, Abstracts. 378 Christchurch, New Zealand.Google Scholar
Vergnaud-Grazzini, C., Ryan, W., Cita, M.B., (1977). Stable isotopic fractionation, climate change and episodic stagnation in the eastern Mediterranean during the late Quaternary. Marine Micropaleontology. 2, 353-370.CrossRefGoogle Scholar
Wust, G., (1961). On the vertical circulation of the Mediterranean Sea. Journal of Geophysical Research. 66, 3260-3271.Google Scholar