Cryostratigraphy and permafrost evolution in the lacustrine lowlands of West-Central Alaska

Auteur(s) et Affiliation(s)

KANEVSKIY, M.

Inst. of Northern Engineering, Univ. of Alaska, Fairbanks, Etats-Unis

JORGENSON, T.

Inst. of Northern Engineering, Univ. of Alaska, Fairbanks, Etats-Unis

Alaska Ecoscience, Fairbanks, Etats-Unis

SHUR, Y.

Inst. of Northern Engineering, Univ. of Alaska, Fairbanks, Etats-Unis

O'DONNELL, J.A.

National Park, Alaska, Fairbanks, Etats-Unis

HARDEN, J.W.

US Geological Survey, Menlo Park, California, Etats-Unis

ZHUANG, Q.

Dept. of Earth, Atmospheric, and Planetary Science, and Dept of Agronomy Purdue Univ., Lafayette, Etats-Unis

FORTIER, D.

Inst. of Northern Engineering, Univ. of Alaska, Fairbanks, Etats-Unis

Dépt. de géographie, Univ. du Québec, Montréal, Canada

Description :
The cryostratigraphy and properties of perennially frozen sediments from 3 areas in the Koyukuk-Innoko region are described and interpreted in terms of permafrost history. A conceptual model of terrain evolution from the Late Pleistocene to the present day identifies 4 stages of yedoma degradation and 5 stages of subsequent permafrost aggradation-degradation. These stages can occur in differing places and times, creating a highly complex mosaic of terrain conditions, complicating predictions of landscape response to future climatic changes or human impact.

Type de document :
Article de périodique

Source :
Permafrost and periglacial processes, issn : 1045-6740, 2014, vol. 25, n°. 1, p. 14-34, nombre de pages : 21, Références bibliographiques : 3 p.

Date :
2014

Editeur :
Pays édition : Royaume-Uni, Chichester, Wiley

Langue :
Anglais