Abrupt high-latitude climate events and decoupled seasonal trends during the Eemian

J. Sakari Salonen (), Karin F. Helmens, Jo Brendryen, Niina Kuosmanen, Minna Väliranta, Simon Goring, Mikko Korpela, Malin Kylander, Annemarie Philip, Anna Plikk, Hans Renssen and Miska Luoto
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J. Sakari Salonen: University of Helsinki
Karin F. Helmens: Stockholm University
Jo Brendryen: University of Bergen
Niina Kuosmanen: Czech University of Life Sciences Prague
Minna Väliranta: University of Helsinki
Simon Goring: University of Wisconsin
Mikko Korpela: University of Helsinki
Malin Kylander: Stockholm University
Annemarie Philip: University of Amsterdam
Anna Plikk: Stockholm University
Hans Renssen: University College of Southeast Norway
Miska Luoto: University of Helsinki

Nature Communications, 2018, vol. 9, issue 1, 1-10

Abstract: Abstract The Eemian (the Last Interglacial; ca. 129–116 thousand years ago) presents a testbed for assessing environmental responses and climate feedbacks under warmer-than-present boundary conditions. However, climate syntheses for the Eemian remain hampered by lack of data from the high-latitude land areas, masking the climate response and feedbacks in the Arctic. Here we present a high-resolution (sub-centennial) record of Eemian palaeoclimate from northern Finland, with multi-model reconstructions for July and January air temperature. In contrast with the mid-latitudes of Europe, our data show decoupled seasonal trends with falling July and rising January temperatures over the Eemian, due to orbital and oceanic forcings. This leads to an oceanic Late-Eemian climate, consistent with an earlier hypothesis of glacial inception in Europe. The interglacial is further intersected by two strong cooling and drying events. These abrupt events parallel shifts in marine proxy data, linked to disturbances in the North Atlantic oceanic circulation regime.

Date: 2018
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Persistent link: https://EconPapers.repec.org/RePEc:nat:natcom:v:9:y:2018:i:1:d:10.1038_s41467-018-05314-1

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DOI: 10.1038/s41467-018-05314-1

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