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(Article of periodic en Anglais - 2009)

Document title

Physical and ecological changes associated with warming permafrost and thermokarst in Interior Alaska

Authors(s) and Affiliation(s)

OSTERKAMP T.E. (1) ; JORGENSON M.T. (2) ; SCHUUR E.A.G. (3) ; SHUR Y.L. (4) ; KANEVSKIY M.Z. (5) ; VOGEL J.G. (3) ; TUMSKOY V.E. (6) ;
(1) Geophysical Inst., Univ. Alaska, Fairbanks, ETATS-UNIS
(2) ABR, Inc, Alaska, Fairbanks, ETATS-UNIS
(3) Dep. of Botany, Univ. of Florida, Gainesville, ETATS-UNIS
(4) Dep. of Civil and Environmental Engineering, Univ. of Alaska, Fairbanks, ETATS-UNIS
(5) Inst. of Northern Engineering, Univ. of Alaska, Fairbanks, ETATS-UNIS
(6) Dep. of Geology,State Univ., Moscow, RUSSIE, FEDERATION DE

Abstract

Observations and measurements were made of physical and ecological changes that have occurred since 1985 at a tundra site near Healy, Alaska. Air temperatures decreased (1985 through 1999) while permafrost warmed and thawed creating thermokarst terrain, probably as a result of increased snow depths. Field and remote-sensing measurements of these changes allowed to assess the interactions of air temperatures and snow on permafrost thermal regimes, the consequences of increasing permafrost temperatures and ground-ice distribution on active-layer dynamics and thermokarst, and the impacts of thermokarst terrain on water redistribution, peat accumulation and shifting vegetation composition. The results provide insights into the processes, dynamics, direction and magnitude of the changes

Source

Article of periodic

published at : Permafrost and periglacial processes / ISSN 1045-6740 / CODEN PEPPED

Editor : Wiley, Chichester - ROYAUME-UNI (1990)

Millesime : 2009, vol. 20, no3 [pp. 235-256]

Bibliographic references : 1,5 p.

Collation : 16 fig., 2 tabl.

Language

Anglais

Digital Object Identifier

Go to electronic document thanks to its DOI : doi:10.1002/ppp.656

Tous droits réservés © Prodig - Bibliographie Géographique Internationale (BGI), 2009
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