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(Article of periodic en Anglais - 2011)

Document title

Expansion rate and geometry of floating vegetation mats on the margins of thermokarst lakes, northern Seward Peninsula, Alaska, USA

Authors(s) and Affiliation(s)

PARSEKIAN A.D. (1) ; JONES B.M. (2 3) ; JONES M. (4) ; GROSSE G. (2) ; WALTER ANTHONY K.M. (4) ; SLATER L. (1) ;
(1) Dep. of earth and Environmental Sciences, Rutgers Univ., Newark, ETATS-UNIS
(2) Permafrost Lab., Geophysical Inst., Univ. of Alaska, Fairbanks, ETATS-UNIS
(3) Alaska Science Center, U.S. Geological Survey, Anchorage, ETATS-UNIS
(4) Water and Environmental Research Center, Univ. of Alaska, Fairbanks, ETATS-UNIS

Abstract

Investigations on the northern Seward Peninsula in Alaska identified zones of recent permafrost collapse that led to the formation of floating vegetation mats along thermokarst lake margins. This paper reports on the recent expansion of these collapse features on Lake Rhonda and Lake Owl and their geometry is determined using geophysical and remote sensing measurements. In addition, the AA. determined the extent of thawed permafrost obscured by floating vegetation mats at the study site and provided a basis for larger scale estimates of bioavailable organic carbon in the thaw bulbs below lake portions covered by floating vegetation mats. They used high-resolution remote sensing imagery to map the spatial extent of the collapse features across the study site, ground-penetrating radar (GPR) to noninvasively map the thickness of the floating vegetation mats and ground temperature measurements to verify the presence of a talik despite very shallow water depths

Source

Article of periodic

published at : Earth surface processes and landforms / ISSN 0197-9337 / CODEN ESPLDB

Editor : Wiley, Chichester - ROYAUME-UNI (1981)

Millesime : 2011, vol. 36, no14 [pp. 1889-1897]

Bibliographic references : 57 ref.

Collation : 6 fig.

Language

Anglais

INIST-CNRS, Cote INIST : 17355

Digital Object Identifier

Go to electronic document thanks to its DOI : doi:10.1002/esp.2210

Tous droits réservés © Prodig - Bibliographie Géographique Internationale (BGI), 2012
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