georefid:2010-043540SEDIS Publication Catalogue

ana.macario@awi.de

http://sedis.iodp.org/pub-catalogue/informationpointOfContact2011-07-06T00:00:00Zhttp://sedis.iodp.org/pub-catalogue/index.php?id=2010-0435402009-01-01publicationgeorefid:2010-043540Dormoy, IsabelleUniversite de Franche-Comte, Laboratoire de Chrono-Environnement, Besancon, FranceauthorPeyron, OdileLaboratoire des Sciences du Climat et l'Environnement, FranceauthorCombourieu Nebout, NathalieSimon Fraser University, CanadaauthorGoring, SimonUniversity of Frankfurt, Federal Republic of GermanyauthorKotthoff, UlrichauthorMagny, MichaelauthorPross, JoergauthorCopernicus, Katlenburg-Lindau, InternationalpublisherdocumentDigitalClimate of the Past5 (4)615-632Pollen-based climate reconstructions were performed on two high-resolution pollen marines cores from the Alboran and Aegean Seas in order to unravel the climatic variability in the coastal settings of the Mediterranean region between 15 000 and 4000 years BP (the Lateglacial, and early to mid-Holocene). The quantitative climate reconstructions for the Alboran and Aegean Sea records focus mainly on the reconstruction of the seasonality changes (temperatures and precipitation), a crucial parameter in the Mediterranean region. This study is based on a multi-method approach comprising 3 methods: the Modern Analogues Technique (MAT), the recent Non-Metric Multidimensional Scaling/Generalized Additive Model method (NMDS/GAM) and Partial Least Squares regression (PLS). The climate signal inferred from this comparative approach confirms that cold and dry conditions prevailed in the Mediterranean region during the Oldest and Younger Dryas periods, while temperate conditions prevailed during the Bolling/Allerod and the Holocene. Our records suggest a West/East gradient of decreasing precipitation across the Mediterranean region during the cooler Late-glacial and early Holocene periods, similar to present-day conditions. Winter precipitation was highest during warm intervals and lowest during cooling phases. Several short-lived cool intervals (i.e. Older Dryas, another oscillation after this one (GI-1c2), Gerzensee/Preboreal Oscillations, 8.2 ka event, Bond events) connected to the North Atlantic climate system are documented in the Alboran and Aegean Sea records indicating that the climate oscillations associated with the successive steps of the deglaciation in the North Atlantic area occurred in both the western and eastern Mediterranean regions. This observation confirms the presence of strong climatic linkages between the North Atlantic and Mediterranean regions.completedQuaternary geologyAegean SeaAlboran SeaAllerodBollingCenozoicclimate changecoresdeglaciationEast MediterraneanHolocenehuman activitylate-glacial environmentleast-squares analysisLeg 161lower HoloceneMediterranean regionMediterranean Seamicrofossilsmiddle HolocenemiosporesMount Athos BasinOcean Drilling ProgramODP Site 976Oldest DryaspaleoclimatologypalynomorphsPleistocenepollenQuaternaryreconstructionregression analysisseasonal variationsstatistical analysisupper Pleistoceneupper WeichselianvariationsWeichselianWest MediterraneanYounger Dryasurn:org.iodp:exp:161urnlargerWorkCitationcampaignurn:org.iodp:exp:161:site:976urnlargerWorkCitationstudyurn:org.iodp:exp:161urnlargerWorkCitationcampaignEnglishgeoscientificInformation-4.1845-4.184536.121936.1219Part of special issue no. 18, Data/model interactions; the biological perspective of understanding past global changes, edited by Rousseau, D. D., Guiot, J., Bonnefille, R., and Goosse, H., http://www.clim-past.net/special_issue18.html; published in Climate of the Past Discussion, http://www.clim-past-discuss.net/5/735/2009/cpd-5-735-2009.html: 27 Feb. 2009; accessed in March, 2010application/pdfunknownSEDIS Publication Catalogue

ana.macario@awi.de

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