LAUSR

Five lakes on the northernmost tip of James Ross Island (JRI), Ulu Peninsula, were selected to study their water temperature regime and relationship to atmospheric factors. Different genetic types of lakes were selected to cover not only influence of atmospheric parameters but also the morphology of lakes. Water temperature of all lakes showed strong similarities in the reaction to atmospheric factors no matter its genetic type or morphological properties, which were only second order factors shaping the general trends into more individual temporal patterns. All lakes are characterised by strong diurnal regime with maximum temperatures in late afternoon and minimum early morning. Most stable conditions were found in Monolith Lake and Triangular Lake, the first one with the biggest volume and regular inflow and outflow of water, the second one with semi-permanent ice cover protecting the water column from larger fluctuations caused by atmospheric factors. The most unstable environment was found in Shallow Lake, small shallow temporary lake with variable water level. Spatio-temporal issues of temperature relationships between water body and the terrestrial environment were shown with IR camera timelapse shooting on the example of Shallow Lake.