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- W2023171854 abstract "CR Climate Research Contact the journal Facebook Twitter RSS Mailing List Subscribe to our mailing list via Mailchimp HomeLatest VolumeAbout the JournalEditorsSpecials CR 32:1-12 (2006) - doi:10.3354/cr032001 Potential effect of climate change on the distribution of palsa mires in subarctic Fennoscandia Stefan Fronzek1,*, Miska Luoto2, Timothy R. Carter1 1Finnish Environment Institute, Box 140, 00251 Helsinki, Finland 2Thule Institute, University of Oulu, Box 7300, 90014 Oulu, Finland *Email: stefan.fronzek@ymparisto.fi ABSTRACT: Palsa mires are northern mire complexes with permanently frozen peat hummocks, located at the outer limit of the permafrost zone. Palsa mires have high conservation status, being characterized by a rich diversity of bird species and unique geomorphological processes. They are currently degrading throughout their distributional range, probably because of regional climatic warming. Distributions of palsas in Fennoscandia were modelled using 5 climate envelope techniques (generalized linear modelling, generalized additive modelling, classification tree analysis, artificial neural networks and multiple adaptive regression splines). The models were studied with respect to their sensitivity to altered climate. Climate change scenarios were applied to assess possible impacts on the palsa distribution during the 21st century. The models achieved a good to very good agreement with the observed palsa distribution and thus suggest a strong dependency on climate. Even small increases of temperature (1°C) and precipitation (10%) resulted in considerable losses of areas suitable for palsa development. Of the 5 models tested, 3 predicted the total disappearance of regions suitable for palsa development with an increased mean annual temperature of 4°C. Under climate change scenarios based on 7 Atmosphere-Ocean General Circulation Models (AOGCMs) the models indicated that the degradation of palsas will proceed very quickly. All but one climate scenario resulted in the total disappearance of suitable regions for palsa development by the end of the 21st century. Potential impacts of degrading palsa mires on biodiversity and carbon balance are the loss of habitat for migrating bird species and the increase in CH4 emissions. KEY WORDS: AOGCM · Climate envelope · Climate scenario · Palsa mire · Peatland · Permafrost · Uncertainty Full text in pdf format NextExport citation RSS - Facebook - Tweet - linkedIn Cited by Published in CR Vol. 32, No. 1. Online publication date: August 10, 2006 Print ISSN: 0936-577X; Online ISSN: 1616-1572 Copyright © 2006 Inter-Research." @default.
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- W2023171854 title "Potential effect of climate change on the distribution of palsa mires in subarctic Fennoscandia" @default.
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