1 / 39

Alaskan Glaciers: Changes in Ice, Vegetation, and Rock/Soil over Time

This study focuses on the Southeast Alaska ice region, specifically the Sheridan and Sherman Glaciers in the Chugach Mountains and the South Sawyer Glacier. The analysis combines Landsat Thematic Mapper (TM) bands, near-infrared and thermal infrared data, and a digital elevation model (DEM) to examine changes in ice, vegetation, and rock/soil. The study investigates glacier retreat, snow accumulation and melting zones, glacial terminus changes, and other features such as ogives and hanging glaciers. The research also explores the impact of earthquakes and rockfall on glacier terminus and pro-glacial lakes. The findings provide valuable insights into the dynamics of Alaskan glaciers.

olliedavis
Download Presentation

Alaskan Glaciers: Changes in Ice, Vegetation, and Rock/Soil over Time

An Image/Link below is provided (as is) to download presentation Download Policy: Content on the Website is provided to you AS IS for your information and personal use and may not be sold / licensed / shared on other websites without getting consent from its author. Content is provided to you AS IS for your information and personal use only. Download presentation by click this link. While downloading, if for some reason you are not able to download a presentation, the publisher may have deleted the file from their server. During download, if you can't get a presentation, the file might be deleted by the publisher.

E N D

Presentation Transcript

  1. Sheridan and Sherman Glaciers, Chugach Mtns.

  2. South Sawyer Glacier- 1999

  3. SOUTHEAST ALASKA ICE VEGETATION ROCK/SOIL

  4. Landsat Thematic Mapper (TM) bands

  5. near infrared thermal infrared Landsat Thematic Mapper (TM) bands computer display: blue green red

  6. SOUTHEAST ALASKA ICE Juneau Icefield VEGETATION ROCK/SOIL

  7. Digital elevation model (DEM) meters sea level

  8. Juneau Icefield Landsat Thematic Mapper image superimposed on digital elevation model

  9. Juneau Icefield

  10. Juneau Icefield Region of the Mendenhall Glacier

  11. Mendenhall Glacier

  12. Recent glacier retreat

  13. South Sawyer Glacier- 1999 trim line- 1988 calving terminus

  14. Lemon Creek Glacier last winter’s snow: accumulation zone melting ice: ablation zone snowline

  15. Juneau Icefield Region of the Taku Glacier

  16. Taku Glacier

  17. accumulation zone Taku Glacier ablation zone

  18. terminus of Taku Glacier outwash terminus

  19. Juneau Icefield Region of the Gilkey Glacier

  20. Vaughn Lewis Icefall Gilkey Glacier

  21. Vaughn Lewis Icefall Clouds and cloud shadows ogives

  22. Vaughn Lewis ice fall ogives

  23. Un-named glacier tributary to Gilkey Vaughn Lewis icefall

  24. Vaughn Lewis icefall: severe extensional deformation producing open cracks, increasing surface area

  25. medial moraines ogives

  26. Looking down the Gilkey Glacier

  27. enhanced TM image of ogives

  28. tent

  29. hanging glaciers valley glacier

  30. cirque glacier terminus

  31. horn arete ridge cirque hanging glacier ogive

  32. Childs Glacier, calving into Copper River

  33. Sheridan and Sherman Glaciers, Chugach Mtns. snowlines Earthquake triggered Rockfall covering terminus of glacier terminus pro-glacial lake

  34. SOUTHEAST ALASKA ICE VEGETATION Glacier Bay ROCK/SOIL

  35. Record of Glacier Bay Terminus Changes 1986 Landsat MSS image 1980 1907 1860 10 km 1794 1780

More Related