Glacier Dynamics in a Changing Climate ___________________________________________________________________________
Valley slope Ice temperature Basal conditions Variables that affect glacier flow: Valley slope Ice temperature Basal conditions
Glaciers Flow: Downhill (slope affects flow speed) Warmer ice flows faster Ice is brittle (crevasses) & ductile Basal characteristics are important (the presence of water at the bed)
PVC pipe lined with sandpaper How Ice Flows: Basal Conditions Preparing the PVC pipe PVC pipe lined with aluminum foil and lubricated with oil Lubricated Bed PVC pipe Normal Bed PVC pipe lined with sandpaper Rough Bed Basal Conditions
How Ice Flows: Valley Slope Angle of PVC pipe 65° Steep 45° Medium 25° Shallow Valley Slope
How Ice Flows: Ice Temperature Flubber temperature warm ice normal cold Flubber microwaved until hot to touch Warm Ice (pink flubber) Flubber at room temperature Normal Ice (white flubber) Flubber placed in the freezer prior to class Cold Ice (blue flubber) Ice Temperature
Lab setup basic setup advanced setup