Re‐evaluation of late Holocene fire histories of three boreal bogs suggest a link between bog fire and climate |
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| Authors: | Jesse L Morris Minna Väliranta Ülle Sillasoo Eeva‐Stiina Tuittila Atte Korhola |
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| Institution: | 1. Department of Geosciences and Geography, University of Helsinki, Helsinki, Finland;2. Department of Environmental Sciences, Environmental Change Research Unit (ECRU), University of Helsinki, Helsinki, Finland;3. Department of Landscape Ecology, Institute of Ecology at Tallinn University, Tallinn, Estonia;4. School of Forest Sciences, University of Eastern Finland, Joensuu, Finland |
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| Abstract: | We re‐evaluated mid‐ and late Holocene fire records at three bog sites in southern Finland and Estonia through quantitative and qualitative analysis of sedimentary charcoal records. Our analysis suggests synchrony amongst the Kontolanrahka, Männikjärve and Lakkasuo bog records. Over the last 5000 years, three episodes of elevated fire occurrence were evident in these bog records, taking place from 4500 to 4000, 3500 to 2000 and 1000 to 500 cal. a BP. These episodes were probably influenced primarily by climate, but also possibly by expansion/retreat of (pre)historic human populations. Although previous studies have proposed that during the late Holocene only weak fire?climate linkages exist, the presented analysis suggests millennial‐ and centennial‐scale synchronous burning episodes. |
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