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Future vegetation c...
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Bosiö, JuliaLund University,Lunds universitet,Institutionen för naturgeografi och ekosystemvetenskap,Naturvetenskapliga fakulteten,Dept of Physical Geography and Ecosystem Science,Faculty of Science
(author)
Future vegetation changes in thawing subarctic mires and implications for greenhouse gas exchange-a regional assessment
- Article/chapterEnglish2012
Publisher, publication year, extent ...
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2012-03-23
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Springer Science and Business Media LLC,2012
Numbers
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LIBRIS-ID:oai:lup.lub.lu.se:87daa765-249e-4f6f-94fa-7236929b33fd
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https://lup.lub.lu.se/record/3284125URI
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https://doi.org/10.1007/s10584-012-0445-1DOI
Supplementary language notes
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Language:English
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Summary in:English
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Subject category:art swepub-publicationtype
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Subject category:ref swepub-contenttype
Notes
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One of the major concerns regarding climate change in high latitudes is the potential feedback from greenhouse gases (GHG) being released from thawing peat soils. In this paper we show how vegetational patterns and associated GHG fluxes in subarctic palsa (peat mounds with a permanently frozen core) mires can be linked to climate, based on field observations from fifteen palsa sites distributed in northern Fennoscandia. Fine resolution (100 m) land cover data are combined with projections of future climate for the 21st century in order to model the potential future distribution of palsa vegetation in northern Fennoscandia. Site scale climate-vegetational relationships for two vegetation types are described by a climate suitability index computed from the field observations. Our results indicate drastic changes in the palsa vegetational patterns over the coming decades with a 97 % reduction in dry hummock areas by 2041-2060 compared to the 1961-1990 areal coverage. The impact of these changes on the carbon balance is a decrease in the efflux of CO2 from 130 kilotonnes C y(-1) to a net uptake of 11 kilotonnes C y(-1) and a threefold increase in the efflux of CH4 from 6 to 18 kilotonnes C y(-1) over the same period and over the 5,520 km(2) area of palsa mires. The combined effect is equivalent to a slight decrease in CO2-C emissions, from 182 to 152 kilotonnes C y(-1). Main uncertainties involve the ability of the vegetation community to adapt to new conditions, and long-term changes in hydrology due to absence of ice and frost heaving.
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Johansson, MargaretaLund University,Lunds universitet,Institutionen för naturgeografi och ekosystemvetenskap,Naturvetenskapliga fakulteten,Dept of Physical Geography and Ecosystem Science,Faculty of Science(Swepub:lu)nate-mjo
(author)
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Callaghan, Terry V.
(author)
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Johansen, Bernt
(author)
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Christensen, TorbenLund University,Lunds universitet,Institutionen för naturgeografi och ekosystemvetenskap,Naturvetenskapliga fakulteten,Dept of Physical Geography and Ecosystem Science,Faculty of Science(Swepub:lu)ekol-tch
(author)
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Institutionen för naturgeografi och ekosystemvetenskapNaturvetenskapliga fakulteten
(creator_code:org_t)
Related titles
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In:Climatic Change: Springer Science and Business Media LLC115:2, s. 379-3980165-00091573-1480
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