Lichenometry on Adelaide Island, Antarctic peninsula : size-frequency studies, growth rates and snowpatches

Lichenometry in subpolar environments. Special issue

Auteur(s) et Affiliation(s)

GOLLEDGE, N.R.

British Geological Survey, Edinburgh, Royaume-Uni

Antarctic Research Centre, Victoria Univ., Wellington, Nouvelle-Zelande

EVEREST, J.D.

British Geological Survey, Edinburgh, Royaume-Uni

BRADWELL, T.

British Geological Survey, Edinburgh, Royaume-Uni

JOHNSON, J.S.

British Antarctic Survey, Cambridge, Royaume-Uni

BRADWELL, T.

British Geological Survey, Edinburgh, Royaume-Uni

Description :
This paper presents new lichenometric population data from the Antarctic Peninsula (67°S), and describes a new approach to lichen growth-rate calibration in locations where dated surfaces are extremely rare. The AA. use historical aerial photography and field surveys to identify sites of former perennial snowpatches where lichen populations now exist. As an independent check on lichen mortality by snowkill, and the timing of snow patch disappearance, the AA. use a positive-degree day (PDD) approach based on monthly climate data from Rothera Research Station. results and discussion about wider applications.

Type de document :
Article de monographie

Source :
Geografiska annaler. Series A. Physical geography, issn : 0435-3676, 2010, vol. 92, n°. 1, p. 111-124, nombre de pages : 14, Références bibliographiques : 52 ref.

Date :
2010

Editeur :
Pays édition : Suede, Stockholm, Svenska sällskapet för antropologi och geografi

Langue :
Anglais