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Plant macrofossil evidence for an early onset of the Holocene summer thermal maximum in northernmost Europe
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Number of Authors: 12
2015 (English)In: Nature Communications, ISSN 2041-1723, E-ISSN 2041-1723, Vol. 6, 6809Article in journal (Refereed) Published
Abstract [en]

Holocene summer temperature reconstructions from northern Europe based on sedimentary pollen records suggest an onset of peak summer warmth around 9,000 years ago. However, pollen-based temperature reconstructions are largely driven by changes in the proportions of tree taxa, and thus the early-Holocene warming signal may be delayed due to the geographical disequilibrium between climate and tree populations. Here we show that quantitative summer-temperature estimates in northern Europe based on macrofossils of aquatic plants are in many cases ca. 2 degrees C warmer in the early Holocene (11,700-7,500 years ago) than reconstructions based on pollen data. When the lag in potential tree establishment becomes imperceptible in the mid-Holocene (7,500 years ago), the reconstructed temperatures converge at all study sites. We demonstrate that aquatic plant macrofossil records can provide additional and informative insights into early-Holocene temperature evolution in northernmost Europe and suggest further validation of early post-glacial climate development based on multi-proxy data syntheses.

Place, publisher, year, edition, pages
2015. Vol. 6, 6809
National Category
Earth and Related Environmental Sciences
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URN: urn:nbn:se:su:diva-117735DOI: 10.1038/ncomms7809ISI: 000353702500049OAI: oai:DiVA.org:su-117735DiVA: diva2:818856
Available from: 2015-06-09 Created: 2015-06-01 Last updated: 2017-12-04Bibliographically approved

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Helmens, KarinKuhry, PeterShala, Shyhrete
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