Millennial to orbital-scale variations of drought intensity in the Eastern Mediterranean

Stockhecke, Mona; Timmermann, Axel; Kipfer, Rolf; Haug, Gerald H.; Kwiecien, Ola; Friedrich, Tobias; Menviel, Laurie; Litt, Thomas; Pickarski, Nadine; Anselmetti, Flavio (2016). Millennial to orbital-scale variations of drought intensity in the Eastern Mediterranean. Quaternary Science Reviews, 133, pp. 77-95. Elsevier 10.1016/j.quascirev.2015.12.016

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Millennial to orbital-scale rainfall changes in the Mediterranean region and corresponding variations in vegetation patterns were the result of large-scale atmospheric reorganizations. In spite of recent efforts to reconstruct this variability using a range of proxy archives, the underlying physical mechanisms have remained elusive. Through the analysis of a new high-resolution sedimentary section from Lake Van (Turkey) along with climate modeling experiments, we identify massive droughts in the Eastern Med- iterranean for the past four glacial cycles, which have a pervasive link with known intervals of enhanced North Atlantic glacial iceberg calving, weaker Atlantic Meridional Overturning Circulation and Dansgaard-Oeschger cold conditions. On orbital timescales, the topographic effect of large Northern Hemisphere ice sheets and periods with minimum insolation seasonality further exacerbated drought intensities by suppressing both summer and winter precipitation.

Item Type:

Journal Article (Original Article)

Division/Institute:

10 Strategic Research Centers > Oeschger Centre for Climate Change Research (OCCR)
08 Faculty of Science > Institute of Geological Sciences

UniBE Contributor:

Anselmetti, Flavio

Subjects:

500 Science > 550 Earth sciences & geology

ISSN:

0277-3791

Publisher:

Elsevier

Language:

English

Submitter:

Flavio Anselmetti

Date Deposited:

11 Jan 2016 16:25

Last Modified:

18 Mar 2016 10:14

Publisher DOI:

10.1016/j.quascirev.2015.12.016

BORIS DOI:

10.7892/boris.74528

URI:

https://boris.unibe.ch/id/eprint/74528

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