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(Article of periodic en Anglais - 2011)

Document title

Near-surface temperatures and heat balance of bare outcrops exposed to solar radiation

Authors(s) and Affiliation(s)

GUNZBURGER Y. (1) ; MERRIEN-SOUKATCHOFF V. (1) ;
(1) LAEGO, Univ., Nancy, FRANCE

Abstract

The study site is a steep gneiss slope known as "Rochers de Valabres" (Alpes-Maritimes, France). Attention was focused on 2 major contributors to the heat balance; the heat flux entering the rock mass through conduction and the incoming shortwave (solar) radiation. A Fourier decomposition of the temperature measurements provided an estimate of the in situ thermal conductivity of the rock and was used to calculate the conductive term. The shortwave radiation term was determined on the basis of the pyranometer measurements adjusted to account for the angle of incidence of the sun. It is shown that, throughout clear-sky periods, heat exchanges at the surface are mainly controlled by direct solar radiation during the day, and by a roughly constant outgoing heat flux during the night. Subsurface temperatures can be reliably estimated with a semi-infinite medium model whose boundary condition is derived from an analytical insolation model that takes atmospheric attenuation into account

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, no12 [pp. 1577-1589]

Bibliographic references : 1 p.

Collation : 14 fig., 1 tabl.

Language

Anglais

INIST-CNRS, Cote INIST : 17355

Digital Object Identifier

Go to electronic document thanks to its DOI : doi:10.1002/esp.2167

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