Cold alpine ice bodies revisited : what may we learn from their impurity and isotope content ?

The mountain cryospere - a holistic view on processes and their interactions

Auteur(s) et Affiliation(s)



Description :
Thereby, the AA. refer to 2 major drilling areas (located in the summit range of Monte Rosa and Mt Blanc massif, respectively) which largely differ in their snow accumulation rate and, hence, in their accessible time scale. A simple scheme considering the seasonality of both, the precipitation-borne signal and the snow erosion-controlled net accumulation rate is presented. It shows that water isotope trends are generally more sensitive to distortion by a seasonality effect than recent snow impurities trends, although the influence of a given seasonal accumulation rate cycle on the mean levels of water isotopes and impurities is similar. These findings are illustrated on the decadal and centennial time scale by the inter- and intra-site variability of major ion and water isotope records. The intra-site comparison includes the discussion of strong water isotope depletions seen some meters above bedrock at low accumulation drilling sites.


Type de document :
Article de monographie

Source :
Geografiska annaler. Series A. Physical geography, issn : 0435-3676, 2012, vol. 94, n°. 2, p. 245-263, nombre de pages : 19, Références bibliographiques : 3 p.

Date :
2012

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