Assessment of chemical denudation rates using hydrological measurements, water chemistry analysis and electromagnetic geophysical data

• Published in: Permafrost and Periglacial Processes
• Main Authors: Beylich, Achim A., Kolstrup, Else, Linde, Niklas, Pedersen, Laust B., Thyrsted, Tage, Gintz, Dorothea, Dynesius, Lars
• Format: Article in Journal/Newspaper
• Language: English
• Published: Wiley 2003
• Subjects: Permafrost and Periglacial Processes; Lapland
• Online Access: http://dx.doi.org/10.1002/ppp.470; https://api.wiley.com/onlinelibrary/tdm/v1/articles/10.1002%2Fppp.470; https://onlinelibrary.wiley.com/doi/pdf/10.1002/ppp.470

Abstract Water chemistry and chemical denudation in relation to local environmental conditions were investigated in a drainage basin of approximately 9 km 2 in northernmost Swedish Lapland (Latnjavagge). Discharge and surface water electric conductivity were measured over the summer of 2001 at selected sites. The chemical investigations show differences between sub‐areas and changes over the season as well as overall rates of chemical denudation. Transects within the catchment using a radio‐magnetotelluric geophysical method describe regolith thickness and ground frost conditions at the time of measurement. This combination of methods obtains information on the influence of regolith thickness and ground frost upon sub‐surface drainage and chemical denudation, not only along the profiles but also, by extension, on areas further upslope. In this paper the techniques are outlined and the approach demonstrated for three sub‐areas with different regolith thicknesses and thaw development. Copyright © 2003 John Wiley & Sons, Ltd.