The thermal structure of glaciers strongly influences their dynamics and hydraulics.

During several projects we have investigated the polythermal structure and its evolution in detail.

• (2015) Heat sources in the Greenland Ice Sheet: Dissipation, temperate paleo-firn and cryo-hydrologic warming
  
• (2013) Cold ice in the ablation zone: Its relation to glacier hydrology and ice water content
  
• (2009) Calving icebergs indicate a thick layer of temperate ice at the base of Jakobshavn Isbræ, Greenland
  
• (2002) Mechanisms of fast flow in Jakobshavn Isbræ, West Greenland: Part III. Measurements of ice deformation, temperature and cross-borehole conductivity in boreholes to the bedrock
  
• (2001) Modelling heat flow in a cold, high-altitude glacier: interpretation of measurements from Colle Gnifetti, Swiss Alps