Stable isotope records of Late Quaternary climate and hydrology from Mediterranean lakes: the ISOMED synthesis

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dc.contributor.author Roberts, N.
dc.contributor.author Jones, M.d.
dc.contributor.author Benkaddour, A.
dc.contributor.author Eastwood, W.j.
dc.contributor.author Filippi, M.l.
dc.contributor.author Frogley, M.r.
dc.contributor.author Lamb, H.f.
dc.contributor.author Leng, M.j.
dc.contributor.author Reed, J.m.
dc.contributor.author Stein, M.
dc.contributor.author Stevens, L.
dc.contributor.author Valero-garcés, B.
dc.contributor.author Zanchetta, G.
dc.date.accessioned 2011-04-14T08:31:27Z
dc.date.available 2011-04-14T08:31:27Z
dc.date.issued 2008-12
dc.identifier.citation Roberts , N , Jones , M , Benkaddour , A , Eastwood , W , Filippi , M , Frogley , M , Lamb , H , Leng , M , Reed , J , Stein , M , Stevens , L , Valero-garcés , B & Zanchetta , G 2008 , ' Stable isotope records of Late Quaternary climate and hydrology from Mediterranean lakes: the ISOMED synthesis ' Quaternary Science Reviews , vol 27 , no. 25-26 , pp. 2426-2441 . , 10.1016/j.quascirev.2008.09.005 en
dc.identifier.issn 0277-3791
dc.identifier.other PURE: 158461
dc.identifier.other dspace: 2160/6525
dc.identifier.uri http://hdl.handle.net/2160/6525
dc.description Roberts, N., Jones, M., Benkaddour, A., Eastwood, W., Filippi, M., Frogley, M., Lamb, H., Leng, M., Reed, J., Stein, M., Stevens, L., Valero-garcés, B., Zanchetta, G. (2008). Stable isotope records of Late Quaternary climate and hydrology from Mediterranean lakes: the ISOMED synthesis. Quaternary Science Reviews, 27 (25-26), 2426-2441. en
dc.description.abstract Lake isotope records can be used to assess the spatial coherency of Late Quaternary climate change across the circum-Mediterranean region. We place modern and palaeo-data within a simple conceptual lake response model to show that the isotope hydrology of most Mediterranean lakes has been influenced strongly by water balance, even in those systems that are chemically dilute (i.e. freshwater). δ18O data on biogenic and endogenic carbonates from 24 lake basins are used to reconstruct multi-millennial-scale trends since the LGM. While it is difficult to make direct comparisons between lake records in terms of single climatic parameters, coherent regional isotopic trends can be identified. During glacial times Mediterranean lakes deposited carbonates isotopically heavier in δ18O compared to the Holocene, partly due to source area effects. Isotopic enrichment was most marked during intervals corresponding to the H1 and Younger Dryas events, confirming that Late Pleistocene cold stages in the North Atlantic region were marked by aridity around much of the Mediterranean. Almost all Mediterranean lake records shifted to more depleted isotopic values during the Last Glacial–Interglacial Transition (LGIT). This shift is the reverse of the trend which characterised the same transition in lakes from northern and central Europe, and suggests that temperature changes were not an important direct driver of Mediterranean lake isotopic records over glacial–interglacial timescales. In the early Holocene, many lakes in the eastern part of the region were more depleted isotopically than in recent millennia. This corresponds with marine sapropel formation, both chronologically and geographically, and implies that increases in local rainfall contributed significantly to the creation of a freshwater lid and anoxia in the East Mediterranean Sea. In contrast, no such pattern is currently apparent from lake isotope records from the West Mediterranean, suggesting a possible NW–SE contrast in climate history during the Holocene. en
dc.format.extent 24 en
dc.language.iso eng
dc.relation.ispartof Quaternary Science Reviews en
dc.title Stable isotope records of Late Quaternary climate and hydrology from Mediterranean lakes: the ISOMED synthesis en
dc.type Text en
dc.type.publicationtype Article (Journal) en
dc.identifier.doi http://dx.doi.org/10.1016/j.quascirev.2008.09.005
dc.contributor.institution Institute of Biological, Environmental and Rural Sciences en
dc.contributor.institution Institute of Geography & Earth Sciences en
dc.description.status Peer reviewed en


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