Recent warming of mountain permafrost in Svalbard and Scandinavia

被引:137
作者
Isaksen, Ketil
Sollid, Johan Ludvig
Holmlund, Per
Harris, Charles
机构
[1] Norwegian Meteorol Inst, NO-0313 Oslo, Norway
[2] Univ Oslo, Dept Geosci, NO-0317 Oslo, Norway
[3] Stockholm Univ, Dept Phys Geog, SE-10691 Stockholm, Sweden
[4] Cardiff Univ, Sch Earth Ocean & Planetary Sci, Cardiff CF10 3XQ, Wales
关键词
D O I
10.1029/2006JF000522
中图分类号
P [天文学、地球科学];
学科分类号
07 ;
摘要
[1] Three deep boreholes (>= 100 m) in mountain permafrost were recently drilled in Svalbard (Janssonhaugen) and in Scandinavia (Tarfalaryggen and Juvvasshoe) for long-term permafrost monitoring. These holes form part of a latitudinal transect of boreholes in permafrost through Europe, established by the Permafrost and Climate in Europe (PACE) project. Six-year thermal time series data collected from the three boreholes are presented. These data provide the first opportunity for temporal trends in permafrost temperatures in Svalbard and Scandinavia to be analyzed. Results show that the permafrost has warmed considerably at all three sites. Significant warming is detectable down to at least 60 m depth, and present decadal warming rates at the permafrost surface are on the order of 0.04 degrees-0.07 degrees C yr(-1), with greatest warming in Svalbard and in northern Scandinavia. The present regional trend shows accelerated warming during the last decade.
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页数:11
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