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Climate variability in SE Europe since 1450 AD based on a varved sediment record from Etoliko Lagoon (Western Greece)

Reed, Jane M.; Zacharias, Lerotheos; Pross, Joerg; Koutsodendris, Andreas; Brauer, Achim; Reed, Jane; Plessen, Birgit; Friedrich, Oliver; Hennrich, Barbara; Zacharias, Ierotheos; Pross, Jörg

Authors

Jane M. Reed

Lerotheos Zacharias

Joerg Pross

Andreas Koutsodendris

Achim Brauer

Dr Jane Reed J.M.Reed@hull.ac.uk
Senior Lecturer in Physical Geography

Birgit Plessen

Oliver Friedrich

Barbara Hennrich

Ierotheos Zacharias

Jörg Pross



Abstract

To achieve deeper understanding of climate variability during the last millennium in SE Europe, we report new sedimentological and paleoecological data from Etoliko Lagoon, Western Greece. The record represents the southernmost annually laminated (i.e., varved) archive from the Balkan Peninsula spanning the Little Ice Age, allowing insights into critical time intervals of climate instability such as during the Maunder and Dalton solar minima. After developing a continuous, ca. 500-year-long varve chronology, high-resolution μ–XRF counts, stable-isotope data measured on ostracod shells, palynological (including pollen and dinoflagellate cysts), and diatom data are used to decipher the season-specific climate and ecosystem evolution at Etoliko Lagoon since 1450 AD. Our results show that the Etoliko varve record became more sensitive to climate change from 1740 AD onwards. We attribute this shift to the enhancement of primary productivity within the lagoon, which is documented by an up to threefold increase in varve thickness. This marked change in the lagoon's ecosystem was caused by: (i) increased terrestrial input of nutrients, (ii) a closer connection to the sea and human eutrophication particularly from 1850 AD onwards, and (iii) increasing summer temperatures. Integration of our data with those of previously published paleolake sediment records, tree-ring-based precipitation reconstructions, simulations of atmospheric circulation and instrumental precipitation data suggests that wet conditions in winter prevailed during 1740–1790 AD, whereas dry winters marked the periods 1790–1830 AD (Dalton Minimum) and 1830–1930 AD, the latter being sporadically interrupted by wet winters. This variability in precipitation can be explained by shifts in the large-scale atmospheric circulation patterns over the European continent that affected the Balkan Peninsula (e.g., North Atlantic Oscillation). The transition between dry and wet phases at Etoliko points to longitudinal shifts of the precipitation pattern in the Balkan Peninsula during the Little Ice Age.

Publication Date Mar 1, 2017
Journal Quaternary science reviews
Print ISSN 0277-3791
Electronic ISSN 1873-457X
Publisher Elsevier
Peer Reviewed Peer Reviewed
Volume 159
Pages 63-76
Institution Citation Reed, J. M., Zacharias, L., Pross, J., Koutsodendris, A., Brauer, A., Reed, J., …Pross, J. (2017). Climate variability in SE Europe since 1450 AD based on a varved sediment record from Etoliko Lagoon (Western Greece). Quaternary science reviews, 159, 63-76. https://doi.org/10.1016/j.quascirev.2017.01.010
DOI https://doi.org/10.1016/j.quascirev.2017.01.010
Keywords Climate variability; Little Ice Age; Solar minimum; Varve microfacies; SE Europe; Balkan Peninsula; Etoliko Lagoon
Publisher URL http://www.sciencedirect.com/science/article/pii/S0277379117300471
Copyright Statement ©2018, Elsevier. This manuscript version is made available under the CC-BY-NC-ND 4.0 license http://creativecommons.org/licenses/by-nc-nd/4.0/
Additional Information This article is maintained by: Elsevier; Article Title: Climate variability in SE Europe since 1450 AD based on a varved sediment record from Etoliko Lagoon (Western Greece); Journal Title: Quaternary Science Reviews; CrossRef DOI link to publisher maintained version: http://dx.doi.org/10.1016/j.quascirev.2017.01.010; Content Type: article; Copyright: © 2017 Elsevier Ltd. All rights reserved.

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Copyright Statement
©2018, Elsevier. This manuscript version is made available under the CC-BY-NC-ND 4.0 license http://creativecommons.org/licenses/by-nc-nd/4.0/





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