February 28, 2007
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FROM VOLUME 8, NUMBER 12, DECEMBER 1995
Response of Permafrost in Boreal Continental Western Canada to Climatic Change,"
L.A. Halsey (Dept. Biol. Sci., Univ. Alberta, Edmonton AB T6G 2E1, Can.), D.H.
Vitt, S.C. Zoltai, Clim. Change, 30(1), 57-73, May 1995.
In this region permafrost is restricted to Sphagnum-dominated
peatlands. Today, 30% of bogs contain permafrost at the -0.4° C isotherm
and 50% at the -1.2° C isotherm. In the past, 30% of bogs contained
permafrost at the -1.4° C isotherm and 50% at the -2.3° C isotherm.
Although spatial degradation has occurred with a shifting of permafrost
northwards in response to warming since the Little Ice Age, permafrost cover has
increased in any given area where present-day temperatures are between 0.5 and
Macroclimate in the Eurasian Cryolithozone and Spread of Permafrost During
Global Warming," O.A. Anisimov (State Hydrol. Inst., Russia), Russian
Meteor. & Hydrol., No. 9, 7-12, 1994.
Uses a parameterized model of the interaction between the climate and
permafrost to assess changes in the area of continental cryolithozone under
various warming scenarios. Concludes that permafrost sensitivity to
precipitation changes is relatively low.
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