Activity 13.3 Nisqually Glacier Response to Climate Change Course/Section Date: Name: Nisqually Glacier is a mountain glacier located on the south side of Mt. Rainier, Washington. Mt. Rainier is...

Activity 13.3 Nisqually Glacier Response to Climate Change Course/Section Date: Name: Nisqually Glacier is a mountain glacier located on the south side of Mt. Rainier, Washington. Mt. Rainier is considered by the USGS to be one of the most threatening volcanoes in the Cascade Mountains. It has not erupted for more than a century perhaps not for the past-500 years A Complete the following tasks to compile a data table shoning the location of the end of Nisqually Glacier relative to the Nisqually River Bridge at different times. 1. Measure the horirontal distance from Nisqually River B stance from Nisqually River Bridge to cach of the small yellow dots on Fig. 13.13 that show where the end (terminus) of Nisqually Glacier was in the past. Record your map measurements (in mm) on the data table in Fig. A13.3.1 Year 1940 Nsqualily River Bridge to 1900 920 1960 1980 2000 24 2.3 2.2 2.1 ear Nisqually Glacier 18 3 1.7 1.6 1.2 1.1 o.8 0.5 0.1 a ndtepeature anomalis 80-2016 awerage from 1310 to 2000 1900 120 19409 Figure A13.3.1 2. Use the bar scale on Fig. 13.13 and your knowledge of proportions to convert your map measurements (in mm) to distance measurements at full scale (in km). Record your calculated distances, rounded to the hundredth of a km, on the data table in Fig. A13.3.1 Plot your data. 1. The vertical lines on the graph in Fig. A13.3.1 represent the years for which data have been compiled. The horizontal lines correspond to horizontal distances between the bridge and the glacier terminus in tenths of km. Carefully plot the data you have compiled on the graph as a set of points. 2. Lightly draw a smooth pencil line through each of the data points in the correct sequence 3. Notice that the glacier terminus retreated up the valley at some times but advanced back down the valley at other times. Summarize these changes in a brief written description that includes the specific time intervals when the glacier retreated or advanced. There is a bar chart below the graph yoss just completed, and the horizontal time horizontal axis in the Nisqually Glacier graph. Notice the blue and salmon pink graph of climatic data at your graph ( axis in the bar chart is identical to the (part B) provided by the NOAA National Climatic Data Center (NCDC). NCDC's global mean temperatures ulated by processing data from thousands of observation sites throughout the world mean temperatures for Earth calc (from 1880 to 2009). The were correcte centers and decreases in temperature with elevation. Although NCDC collects and pr graph shows the variation in annually averaged global land surface temperature only si I. Describe the long term trend in this graph--how averaged global land s are rature data were corrected for Eac tors such as increases in temperature around uwban processes data on land and sea, this surface temperature changed from 1880 to 2015 2. Lightly in pencil, trace any shorterterm pattern of cyclic climate change that you can identify in the graph. Deseribe this cyclic shorter-term trend D Descrhe honw the changes in penition of the terminus of Nisqually Glacier compare to variations in annualy averaged global land surface temperaure. Be as specific as you can. REFLECT& DISCUSS Based oall of your work abve, do you think Nisqually Clacier can be uaed as an indicaor of climate change? Explain 372 Ni Glacier 1941 1931 Fall 1918 Nisqually River 1905 -1910 1896 Glacier data from C.C S M. Hodg 1983 The Nisqually Glacie Mount Rasnies 1870 Base map fopm USGS (2014), accessed via Wap center is approximately 46,793, 121.752 3of Nisquelly Glacier on Mt. Rainier, Washington. This map shows where the end heminus) uap Cises o sted between 1840 and 1997. Yellow dots are points used in Activity 13.3 500 Nisqually Glacier 3000 5600 966 19760 1968 stagant1956 1954 1941 1936 Tat 1931 1921 190513-1910 1855 men, and S.M. Hodge. anier Wash 1885 189 879 alls 83541ss 1857 Map center is 46.793 N, 121.75208 the end Cerminus) 13.13 Variation in length of Nisqually Glacier on Mt. Rainier, Washington. This map shows Figure 1 of Nisqually Glacier was located 1840 located between 1840 and 1997 Yellow dots are points used in Acivity 13.3