Thermal perturbation and rainfall runoff have greater impact on seasonal solute loads than physical disturbance of the active layer

Auteur(s) et Affiliation(s)



Description :
The AA. measured total dissolved solute (TDS) concentrations and normalised seasonal TDS fluxes (kg mm-1) in a series of small headwater catchments in the Canadian High Arctic over 3 consecutive summers (2007–09) to examine the impact of thermal perturbation (increased soil temperatures) and physical disturbance (active-layer detachment slides) on solute dynamics in permafrost catchments. The results show that the impact of the disturbance area on seasonal solute flux is limited by discharge and hydrological connectivity of the disturbed areas, and that summer rainfall allows for enhanced export of solutes from catchments subject to physical disturbance. Hence, seasonal solute export in these permafrost catchments was more sensitive to thermal perturbations and rainfall runoff than to physical disturbance of the active layer.


Type de document :
Article de périodique

Source :
Permafrost and periglacial processes, issn : 1045-6740, 2013, vol. 24, n°. 3, p. 241-251, nombre de pages : 11, Références bibliographiques : 1 p.

Date :
2013

Editeur :
Pays édition : Royaume-Uni, Chichester, Wiley