Petermann Glacier and Jakobshavn Isbrae Glacier By: Rachel Soika and Paul Swanson.
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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 1985-2011Petermann 2000-2011
Data Information
Jakobshavn IsbraeLocated 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.
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.
Methods Used
Unsupervised ClassificationUsed as reference for rest of project
Supervised ClassificationImage Difference
Petermann Glacier
Top Right taken in 2000
Below taken in 2011
Unsupervised Classification- Petermann Glacier
Top Left is 2000Below is 2011
Supervised Classification Classes for Petermann Glacier
SnowMagentaGlacier/Ice waterCyanWaterBlueRockBrownDark IcePurpleBlue IceOrangeSnow RidgesYellowThick IceLight Green
Supervised classification Petermann Glacier
Top Right 2000Below left 2011
Image Difference- Petermann Glacier
Mostly DecreaseProblems with
satellite streaking
Jakobshavn Isbrae Glacier
Top Right is 1985Below is 1992
Jackobshavn Isbrae Glacier continued
Top Right is 2000Below is 2011
Unsupervised Classification Jakobshavn Isbrae
Top left 1985Below 1992
Unsupervised Classification Jakobshavn Isbrae
Top Right 2000Below 2011
Supervised Classification Classes- Jakobshavn Isbrae Glacier
Snow MagentaGlacier/Ice waterCyanWaterBlueRockBrownElevated RockMaroonDark IcePurpleBlue Ice OrangeSnow Ridges YellowThick Ice Light Green
Supervised Classification Jakobshavn Isbrae
Top Left 1985Below 1992
Supervised Classification Jakobshavn Isbrae
Top Right 2000Below 2011
Image Difference- Jakobshavn Isbrae
Top Left compares 1985 and 1992
Below compares 1992 and 2000
Image Difference- Jakobshavn Isbrae
Top Right compares 2000 and 2011
Below Compares 1985 and 2011
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
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
Repercussions of Melting Glaciers
Rising sea levels Less Icebergs Warmer water temperatures
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