Turn to p. 31 in the provided copy of Landforms of Alberta' and, using the stereoscope,...
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Turn to p. 31 in the provided copy of "Landforms of Alberta' and, using the stereoscope, look at the stereo-triplet of the Freshfield Icefield. 1. Name the features marked at A, B, C, D and E (from the attached image of Freshfield Icefield) 5 pts 2. What does the feature at D tell you about the bed topography under the glacier and the nature of its flow over that location? 2 pts 3. Mark clearly the equilibrium line on the copy of one of the airphotos (pg. 3 of this lab handout). 2 pts 4. Assume the photo was taken at the end of the ablation season in 1978. Use the table of net glacier mass balance to construct a graph of cumulative net mass balance (do this in Excel and provide a copy with your assignment). Was the Equilibrium Line altitude higher or lower in 1973? What about 1980? What happened to the glacier margin after 1976? Assuming that average summer temperature remained the same between 1970 and 1980, provide a climatic explanation for the net mass balance trend between 1970 and 1975. 6 pts bolog Freshfield Gl. Net mass balance (m s.w.e.) Net mass balance 1.8 0.3 -0.3 0.8 0.6 0.3 -1.0 -1.0 -0.5 0.2 -1.5 Year 1970 1971 1972 1973 1974 1975 1976 1977 1978 1979 1980 5. Mark the Little Ice Age (LIA) trim line on the copy of the airphoto (pg.5 of this assignment). Alpine glaciers advanced several times in the region during the late Holocene (but prior to the LIA); using your knowledge of the Little Ice Age, what is the most likely explanation for the lack of surface evidence for these earlier advances? 3 pts D Freshfield Icefield p. 31 Landforms of Alberta Turn to p. 31 in the provided copy of "Landforms of Alberta' and, using the stereoscope, look at the stereo-triplet of the Freshfield Icefield. 1. Name the features marked at A, B, C, D and E (from the attached image of Freshfield Icefield) 5 pts 2. What does the feature at D tell you about the bed topography under the glacier and the nature of its flow over that location? 2 pts 3. Mark clearly the equilibrium line on the copy of one of the airphotos (pg. 3 of this lab handout). 2 pts 4. Assume the photo was taken at the end of the ablation season in 1978. Use the table of net glacier mass balance to construct a graph of cumulative net mass balance (do this in Excel and provide a copy with your assignment). Was the Equilibrium Line altitude higher or lower in 1973? What about 1980? What happened to the glacier margin after 1976? Assuming that average summer temperature remained the same between 1970 and 1980, provide a climatic explanation for the net mass balance trend between 1970 and 1975. 6 pts bolog Freshfield Gl. Net mass balance (m s.w.e.) Net mass balance 1.8 0.3 -0.3 0.8 0.6 0.3 -1.0 -1.0 -0.5 0.2 -1.5 Year 1970 1971 1972 1973 1974 1975 1976 1977 1978 1979 1980 5. Mark the Little Ice Age (LIA) trim line on the copy of the airphoto (pg.5 of this assignment). Alpine glaciers advanced several times in the region during the late Holocene (but prior to the LIA); using your knowledge of the Little Ice Age, what is the most likely explanation for the lack of surface evidence for these earlier advances? 3 pts D Freshfield Icefield p. 31 Landforms of Alberta
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Six natural regions are recognized in Alberta see Fig 2 Grassland Parkland Foothills Bor... View the full answer
Related Book For
Income Tax Fundamentals 2013
ISBN: 9781285586618
31st Edition
Authors: Gerald E. Whittenburg, Martha Altus Buller, Steven L Gill
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