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Petermann Glacier and Jakobshavn Isbrae Glacier

Petermann Glacier and Jakobshavn Isbrae Glacier. By: Rachel Soika and Paul Swanson. Objectives. To Document the change of Petermann Glacier in comparison to changes in Jakobshavn Isbrae Glacier Landsat4-7 archives Decadal comparisons Jakobshavn Isbrae 1985-2011 Petermann 2000-2011.

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Petermann Glacier and Jakobshavn Isbrae Glacier

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  1. Petermann Glacier and Jakobshavn Isbrae Glacier By: Rachel Soika and Paul Swanson

  2. Objectives • To Document the change of Petermann Glacier in comparison to changes in Jakobshavn Isbrae Glacier • Landsat4-7 archives • Decadal comparisons • Jakobshavn Isbrae 1985-2011 • Petermann 2000-2011

  3. Data Information • Jakobshavn Isbrae • Located in West Greenland near the town, Ilulissat. • It is considered a large outlet glacier that enters the Ilulissat Icefjord. • The coordinates are 69.1667 latitude and -49.8333 longitude. • Approximate size is 1000 meters.

  4. Data Information • Petermann Glacier • located in Northwest Greenland and east of the Nares Strait. • The coordinates are 80.5000 latitude and -59.5000 longitude. • Approximate size is 1000 meters.

  5. Methods Used • Unsupervised Classification • Used as reference for rest of project • Supervised Classification • Image Difference

  6. Petermann Glacier • Top Right taken in 2000 • Below taken in 2011

  7. Unsupervised Classification- Petermann Glacier • Top Left is 2000 • Below is 2011

  8. Supervised Classification Classes for Petermann Glacier • SnowMagenta • Glacier/Ice waterCyan • WaterBlue • RockBrown • Dark IcePurple • Blue IceOrange • Snow RidgesYellow • Thick IceLight Green

  9. Supervised classification Petermann Glacier • Top Right 2000 • Below left 2011

  10. Image Difference- Petermann Glacier • Mostly Decrease • Problems with satellite streaking

  11. Jakobshavn Isbrae Glacier • Top Right is 1985 • Below is 1992

  12. Jackobshavn Isbrae Glacier continued • Top Right is 2000 • Below is 2011

  13. Unsupervised Classification Jakobshavn Isbrae • Top left 1985 • Below 1992

  14. Unsupervised Classification Jakobshavn Isbrae • Top Right 2000 • Below 2011

  15. Supervised Classification Classes- Jakobshavn Isbrae Glacier • Snow Magenta • Glacier/Ice waterCyan • WaterBlue • RockBrown • Elevated RockMaroon • Dark IcePurple • Blue Ice Orange • Snow Ridges Yellow • Thick Ice Light Green

  16. Supervised Classification Jakobshavn Isbrae • Top Left 1985 • Below 1992

  17. Supervised Classification Jakobshavn Isbrae • Top Right 2000 • Below 2011

  18. Image Difference- Jakobshavn Isbrae • Top Left compares 1985 and 1992 • Below compares 1992 and 2000

  19. Image Difference- Jakobshavn Isbrae • Top Right compares 2000 and 2011 • Below Compares 1985 and 2011

  20. Results and Data Usage • Clear Change between 1985 and 2011 for Jakobshavn Isbrae • Indication of change for Petermann Glacier between 2000 and 2011 • No accuracy assessment • Confident in using data for comparison and documenting change

  21. Encountered Problems • Constantly needed to Re-layer Data • Had problems with streaking • The Image difference was a little off between the 1990’s data and 2000 data

  22. Repercussions of Melting Glaciers • Rising sea levels • Less Icebergs • Warmer water temperatures

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