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(Article of periodic en Anglais - 2009)

Document title

Thermal characterisation of active layer across a soil moisture gradient in the McMurdo Dry Valleys, Antarctica

Authors(s) and Affiliation(s)

IKARD S.J. (1) ; GOOSEFF M.N. (2) ; BARRETT J.E. (3) ; TAKACS-VESBACH C. (4) ;
(1) Dept. of Geology and Geological Engineering, Colorado School of Mines, Golden, ETATS-UNIS
(2) Dept. of Civil & Environmental Engineering, Pennsylvania State Univ., ETATS-UNIS
(3) Dept. of Biological Sciences, Virgini Polytechnic Univ., Blacksburg, ETATS-UNIS
(4) Dept. of Biology Univ. of New Mexico, Albuquerque, ETATS-UNIS

Abstract

Here, the AA. present results of a study to characterise soil thermal properties along a soil moisture gradient adjacent to Lake Fryxell in Taylor Valley, Antarctica. The goals were to characterise the thermal characteristics of these relatively wet soils (compared to the rest of the McMurdo Dry Valleys landscape), and to assess the response of the active layer to possible increases in soil moisture. The AA. measured subsurfaces temperatures at depths from 3 to 50 cm at 4 locations along a natural gradient of wet to dry soils adjacent to Lake Fryxell from January 2006 to January 2007. They used a numerical model to estimate apparent thermal diffusivity (ATD) and simulate observed temperature time series. Estimated bulk ATD values were consistently greater in locations of enhanced soil moisture, so lakeside soils were more likely to conducte energy into the subsurface. Increased soil moisture across the landscape would likely increase ATD, allowing for greater heat exchange between the atmosphere and the subsurface

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, no1 [pp. 27-39]

Bibliographic references : 2 p.

Collation : 6 fig., 2 tabl.

Language

Anglais

Digital Object Identifier

Go to electronic document thanks to its DOI : doi:10.1002/ppp.634

Prodig - Bibliographie Géographique Internationale (BGI)
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