H
Heikki Seppä
Researcher at University of Helsinki
Publications - 168
Citations - 10172
Heikki Seppä is an academic researcher from University of Helsinki. The author has contributed to research in topics: Holocene & Climate change. The author has an hindex of 53, co-authored 157 publications receiving 8836 citations. Previous affiliations of Heikki Seppä include Uppsala University & Fujian Normal University.
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Journal ArticleDOI
Pollen-based continental climate reconstructions at 6 and 21 ka: A global synthesis
Patrick J. Bartlein,Sandy P. Harrison,Sandy P. Harrison,Simon Brewer,Simon Connor,Basil A. S. Davis,Konrad Gajewski,Joel Guiot,T I Harrison-Prentice,A S Henderson,Odile Peyron,Iain Colin Prentice,Iain Colin Prentice,Marko Scholze,Heikki Seppä,Bryan N. Shuman,Shinya Sugita,Robert S. Thompson,A. E. Viau,John W. Williams,Haibin Wu +20 more
TL;DR: In this article, the mid-Holocene (MH, around 6 ka) and the Last Glacial Maximum (LGM, around 21 ka) were compared with palaeoclimate simulations currently being carried out as part of the fifth Assessment Report (AR5) of the Intergovernmental Panel on Climate Change.
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The spatial and temporal complexity of the Holocene thermal maximum
TL;DR: In this paper, the authors simulate the Holocene thermal maximum in a coupled global ocean-atmosphere-vegetation model and find that before 7,000 years ago, summers were substantially cooler over regions directly influenced by the presence of the Laurentide ice sheet.
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July mean temperature and annual precipitation trends during the Holocene in the Fennoscandian tree-line area: pollen-based climate reconstructions
TL;DR: In this paper, the authors used a modern pollen-climate calibration model based on weighted-averaging partial least squares regression to reconstruct the early Holocene climate of northern Finland from pollen assemblages.
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Last nine-thousand years of temperature variability in Northern Europe
Heikki Seppä,Anne E. Bjune,Richard J. Telford,Harry John Betteley Birks,Harry John Betteley Birks,Siim Veski +5 more
TL;DR: In this article, the authors explore the results of 36 Holocene pollen-based July mean and annual mean temperature reconstructions from Northern Europe by stacking them to create summary curves, and compare them with a high-resolution, summary chironomid-based temperature record and other independent palaeoclimate records.
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Global characterization of the Holocene Thermal Maximum
TL;DR: In this article, the authors analyzed the global variations in the timing and magnitude of the Holocene Thermal Maximum (HTM) and their dependence on various forcings in transient simulations covering the last 9000 years (9 ka), performed with a global atmosphere-ocean-vegetation model.