COGS End-of-Year Student Presentation

1. Exploring GIS in Glaciology
Allie Strel, May 24 2012

2. North American Glaciers
Exploring GIS in Glaciology May 24, 1012

3. Why Study Glaciers?
Global Climate Change
Exploring GIS in Glaciology May 24, 1012

4. Why Study Glaciers?
Sea Level Rise
Exploring GIS in Glaciology May 24, 1012

5. Why Study Glaciers?
Fresh Water
Exploring GIS in Glaciology May 24, 1012

6. GIS and Glaciology
Exploring GIS in Glaciology May 24, 1012

7. Study Glaciers
Exploring GIS in Glaciology May 24, 1012

8. Primary Data
Altimetry
Data
Landsat
Imagery
15 Minute
Digital
Elevation
Models
Digital
Topographic
Maps
Exploring GIS in Glaciology May 24, 1012

9. Change in Area
Exploring GIS in Glaciology May 24, 1012

10. Change in Area
Exploring GIS in Glaciology May 24, 1012

11. Change in Area (km2)
-2.65
-19.63
-7.75 -1.38
-38.72
9.9
-17.06
-22.3
20
10
0
-10
-20
-30
-40
-50
Gulkana Tazlina Kennicott Wolverine LeConte Taku Mendenhall Llewellyn
Change in Area (km2)
Exploring GIS in Glaciology May 24, 1012

12. Change in Area (%)
-13.25%
-4.53%
-3.06%
-8.12%
-8.53%
1.21%
-14.96%
-4.58%
4%
2%
0%
-2%
-4%
-6%
-8%
-10%
-12%
-14%
-16%
Gulkana Tazlina Kennicott Wolverine LeConte Taku Mendenhall Llewellyn
Change in Area (% )
Exploring GIS in Glaciology May 24, 1012

13. Slope & Aspect Mapping
Exploring GIS in Glaciology May 24, 1012

14. Accumulation Area Ratio
Exploring GIS in Glaciology May 24, 1012

15. Accumulation Area Ratio
Exploring GIS in Glaciology May 24, 1012

16. Accumulation Area Ratio
Exploring GIS in Glaciology May 24, 1012

17. Glacier Hypsography
Exploring GIS in Glaciology May 24, 1012

18. Glacier Hypsography
Exploring GIS in Glaciology May 24, 1012

19. Glacier Hypsography
Exploring GIS in Glaciology May 24, 1012

20. Change in Volume and Annual Mass Balance
Exploring GIS in Glaciology May 24, 1012

21. Change in Volume and Annual Mass Balance
Exploring GIS in Glaciology May 24, 1012

22. Change in Volume and Annual Mass Balance
Elevation Change (1948 - 1995)
0 metres - 73 -145 metres
Exploring GIS in Glaciology May 24, 1012

23. Values Calculated by Python Script
• Average Δheight per elevation band * area
• Units: km3
• Total Volume Change / Num. of Years
• Corrected for density difference between ice and water
• Units: m3/yr; water equivalent
• (Total Volume Change / Total Area) / Num. of Years
• Units: m/yr
Exploring GIS in Glaciology May 24, 1012

24. Average Annual Change in Height (m/yr)
-0.41
-0.55
-0.13
-0.47
-0.56
-0.87
-0.9
0
-0.1
-0.2
-0.3
-0.4
-0.5
-0.6
-0.7
-0.8
-0.9
-1
Gulkana Tazlina Kennicott Wolverine LeConte Mendenhall Llewellyn
Average Annual Change in Height (m/yr)
Exploring GIS in Glaciology May 24, 1012

25. -7.99
-218.34
-32.4 -8.01
-223.64
-92.67
-623.7
0
-100
-200
-300
-400
-500
-600
-700
Gulkana Tazlina Kennicott Wolverine LeConte Mendenhall Llewellyn
Average Annual Net Balance
(* 106 m3/yr; water equivalent)
Annual Mass Balance
Exploring GIS in Glaciology May 24, 1012

26. DEM Differencing
Exploring GIS in Glaciology May 24, 1012

27. Conclusion
Exploring GIS in Glaciology May 24, 1012

28. Questions?
Exploring GIS in Glaciology May 24, 1012

29. Data Sources
Data Type Data Provider Website
Landsat Imagery USGS Global Visualization Viewer glovis.usgs.gov/
USGS DEMs Alaska Geospatial Data Clearinghouse agdc.usgs.gov/data/usgs/geodata/dem/63K/demlist_A.html
Canadian DEMs Geobase www.geobase.ca/geobase/en/data/cded/index.html
SRTM DEMs CGIAR Consortium for Spatial Information srtm.csi.cgiar.org/SELECTION/inputCoord.asp
USGS Digital Topo. Maps Alaska Geospatial Data Clearinghouse agdc.usgs.gov/data/usgs/geodata/drg/temp/drglist_A.html
Can. Digital Topo. Maps National Resources Canada – Toporama ftp://ftp2.cits.nrcan.gc.ca/pub/toporama/
Altimetry Data National Snow & Ice Data Center ftp://sidads.colorado.edu/DATASETS/NOAA/G01378
GLIMS Glacier Outlines NSIDC– GLIMS Glacier Database glims.colorado.edu/textsearch/
Benchmark mass balance data USGS Benchmark Glaciers Website ak.water.usgs.gov/glaciology/index.html
North American Outline Thematicmapping.org thematicmapping.org
Glaciated Areas - Alaska
Glaciated Areas - Yukon
Alaska State Geospatial Data Clearinghous
Geomatics, Yukon
www.asgdc.state.ak.us
www.geomaticsyukon.ca/
ESRI Basemaps OpenStreetMap and Contributors, Creative
Commons: Share Alike License
N/A
Exploring GIS in Glaciology May 24, 1012