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Numrering	Referens	Omslagsbild	Hitta
1.	Callaghan, Terry, et al. (författare) Multi-Decadal Changes in Tundra Environments and Ecosystems : Synthesis of the International Polar Year-Back to the Future Project (IPY-BTF) 2011 Ingår i: Ambio. - : Springer Science and Business Media LLC. - 0044-7447 .- 1654-7209. ; 40:6, s. 705-716 Tidskriftsartikel (refereegranskat)abstract Understanding the responses of tundra systemsto global change has global implications. Most tundraregions lack sustained environmental monitoring and oneof the only ways to document multi-decadal change is toresample historic research sites. The International PolarYear (IPY) provided a unique opportunity for such researchthrough the Back to the Future (BTF) project (IPY project#512). This article synthesizes the results from 13 paperswithin this Ambio Special Issue. Abiotic changes includeglacial recession in the Altai Mountains, Russia; increasedsnow depth and hardness, permafrost warming, andincreased growing season length in sub-arctic Sweden;drying of ponds in Greenland; increased nutrient availabilityin Alaskan tundra ponds, and warming at mostlocations studied. Biotic changes ranged from relativelyminor plant community change at two sites in Greenland tomoderate change in the Yukon, and to dramatic increasesin shrub and tree density on Herschel Island, and in subarcticSweden. The population of geese tripled at one sitein northeast Greenland where biomass in non-grazed plotsdoubled. A model parameterized using results from a BTFstudy forecasts substantial declines in all snowbeds andincreases in shrub tundra on Niwot Ridge, Colorado overthe next century. In general, results support and provideimproved capacities for validating experimental manipulation,remote sensing, and modeling studies.
2.	Johansson, Margareta, et al. (författare) Past and present permafrost temperatures in the Abisko area: redrilling of boreholes. 2011 Ingår i: Ambio: a Journal of Human Environment. - : Springer Science and Business Media LLC. - 0044-7447. ; 40:6, s. 558-565 Tidskriftsartikel (refereegranskat)abstract Monitoring of permafrost has been ongoing since 1978 in the Abisko area, northernmost Sweden, when measurements of active layer thickness started. In 1980, boreholes were drilled in three mires in the area to record permafrost temperatures. Recordings were made twice per year, and the last data were obtained in 2002. During the International Polar Year (2007-2008), new boreholes were drilled within the 'Back to the Future' (BTF) and 'Thermal State of Permafrost' (TSP) projects that enabled year-round temperature monitoring. Mean annual ground temperatures (MAGT) in the mires are close to 0 degrees C, ranging from -0.16 to -0.47 degrees C at 5 m depth. Data from the boreholes show increasing ground temperatures in the upper and lower part by 0.4 to 1 degree C between 1980 and 2002. At one mire, permafrost thickness has decreased from 15 m in 1980 to ca. 9 m in 2009, with an accelerating thawing trend during the last decade.

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Typ av publikation: tidskriftsartikel (2)

Typ av innehåll: refereegranskat (2)

Författare/redaktör: Keuper, Frida (2); Johansson, Margareta (2); Åkerman, Jonas (2)Ta bort avgränsningen; Christensen, Torben (2); Lantuit, Hugues (2); Callaghan, Terry (2); visa fler...; Olsson, Håkan (1); Johnstone, Jill F. (1); Hedenås, Henrik (1); Emanuelsson, Urban (1); Eriksson, Håkan (1); Lin, David (1); Hik, David S. (1); Pohjola, Veijo A, 19 ... (1); Bergstedt, Johan (1); Tamstorf, Mikkel (1); Danby, Ryan K. (1); Myers-Smith, Isla H. (1); Tweedie, Craig (1); Matveyeva, Nadya (1); Andrews, Christopher (1); Butler, Malcolm G. (1); Cooley, Dorothy (1); Dahlberg, Ulrika (1); Daniels, Fred J. A. (1); Molenaar, Johannes G ... (1); Dick, Jan (1); Mortensen, Christian ... (1); Ebert-May, Diane (1); Henry, Greg. H. R. (1); Hobbie, John E. (1); Jantze, Elin, 1983- (1); Jaspers, Cornelia (1); Johansson, Cecilia, ... (1); Johnson, David R. (1); Jonasson, Christer (1); Kennedy, Catherine (1); Kenney, Alice J. (1); Koh, Saewan (1); Krebs, Charles J. (1); Lara, Mark J. (1); Lougheed, Vanessa L. (1); Madsen, Jesper (1); McEwen, Daniel C. (1); Narozhniy, Yuriy K. (1); Price, Larry W. (1); Rigét, Frank (1); Rundqvist, Sara (1); Sandström, Anneli (1); Bogaert, Rik (1); visa färre...

Lärosäte: Lunds universitet (2); Högskolan Kristianstad (1); Uppsala universitet (1); Stockholms universitet (1); Linköpings universitet (1); Sveriges Lantbruksuniversitet (1)

Språk: Engelska (2)

Forskningsämne (UKÄ/SCB): Naturvetenskap (2); Lantbruksvetenskap (1)

År: 2011 (2)

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