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GLACIATION Bob Carson June 2007

GLACIATION Bob Carson June 2007. Spitsbergen photo by Ben Schupack. GRAUPEL. SNOW. American Scientist. SNOWFIELDS ARE NOT GLACIERS. MOUNT ST. HELENS 17 MAY 2007. Photo by Jonathan Loeffler. GLACIERS. MOUNT OLYMPUS. MOUNT HAYES, ALASKA RANGE, AUSTIN POST. GLACIER VELOCITY.

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GLACIATION Bob Carson June 2007

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  1. GLACIATIONBob Carson June 2007 Spitsbergen photo by Ben Schupack

  2. GRAUPEL SNOW American Scientist

  3. SNOWFIELDSARE NOT GLACIERS MOUNT ST. HELENS 17 MAY 2007 Photo by Jonathan Loeffler

  4. GLACIERS MOUNT OLYMPUS

  5. MOUNT HAYES, ALASKA RANGE, AUSTIN POST

  6. GLACIER VELOCITY STAGNANT: TOO THIN OR SURFACE SLOPE TOO GENTLE POLAR (COLD-BASED): FLOW ONLY (FROZEN TO BED) TEMPERATE (WARM-BASED): FLOW AND SLIP SURGING: MELTWATER REDUCES FRICTION GLACIER BAY

  7. STAGNANT GLACIER MOUNT EVEREST

  8. POLAR GLACIER Antarctica photo by Clare Carson

  9. TEMPERATE GLACIER MOUNT OLYMPUS

  10. THE SOLE OF A GLACIER SOUTH SAWYER GLACIER, AUSTIN POST

  11. SURGING GLACIER ST. ELIAS MOUNTAINS

  12. PETERS GLACIER PHOTO BY PAUL SHEARER

  13. 30-60% of Svalbard glaciers surge Fridtjofbreen, Bellsund, Spitsbergen Photo M. J. Hambrey

  14. GLACIER MASS BALANCE • ACCUMULATION > ABLATION: MARGIN ADVANCES • ACCUMULATION = ABLATION: EQUILIBRIUM (MORAINE BUILDING) • ACCUMULATION < ABLATION: MARGIN RETREATS (GLACIER DOES NOT DEFY GRAVITY) SOUTH CASCADE GLACIER, 1957, AUSTIN POST

  15. THE EARTH’S NEWEST GLACIER ISADVANCING MOUNT ST. HELENS, 17 MAY 2007

  16. GLACIER IN EQUIBRIUM in mid 1800s Athabasca Glacier by Ward’s

  17. MOST OF THE EARTH’S GLACIERS ARE RETREATING TIERRA DEL FUEGO

  18. GLACIER SIZE AND SHAPE Spitsbergen photo by Ben Schupack

  19. CIRQUE GLACIERS AND CIRQUES TETON RANGE

  20. CIRQUES HANGAY MOUNTAINS

  21. TARNS Katahdin photo by Tim Wood

  22. VALLEY GLACIERS AND GLACIAL TROUGHS ALTAI MOUNTAINS

  23. GLACIAL TROUGHS STEENS MOUNTAIN ALTAI MOUNTAINS

  24. GLACIAL TROUGH LAKES WATERTON LAKE Sierra Nevada photo by Steve Brown

  25. FJORDS Baffin Island photo by Taylor Johnson

  26. FJORDS www.kingsleighinn.com/images/SomesSound

  27. WHY ARE FJORDS SO DEEP? • SEA LEVEL FLUCTUATION = 120 m • DENSITY ice = 90% DENSITY water TRACY ARM, AUSTIN POST

  28. SOGNE FJORD 1308m www.caingram.info folk.uio.no

  29. SKELTON INLET 1933m Skelton Glacier www.rosssea.info

  30. MOUNTAIN ICE CAPS Glacier http://www3.eou.edu/geology/wallowalake

  31. MOUNTAIN ICE SHEETS

  32. MOUNTAIN ICE SHEETS WATERVILLE PLATEAU LAKE CHELAN geoscape.nrcan.gc.ca/.../images

  33. CONTINENTAL ICE SHEETS www.crystalinks.com/antarctica_satellite

  34. Greenland photo by George Linkletter CONTINENTAL ICE SHEETS Greenland photo by Art Rempel Greenland photo by George Linkletter

  35. ICE SHELVES ROSS ICE SHELF www.mbari.org/benthic/tour1.htm

  36. LARSON ICE SHELFCOLLAPSED IN 1995 1997 1992 svs.gsfc.nasa.gov/vis/a000000/a001400/a001400/

  37. SEA ICE (NOT A GLACIER) Antarctica photo by Seth White

  38. SEA ICE Scott Polar Research Institute

  39. ICEBERGS (NOT GLACIERS) GREENLAND

  40. ICEBERGS Antarctica photo by Clare Carson

  41. PROCESSES • ICE: ABRASION, PLUCKING, DEPOSITION • MELTWATER: CORRASION, ABRASION, DEPOSITION • MASS WASTING MOUNT EVEREST

  42. OTHER EROSIONAL LANDFORMS BEARTOOTH MOUNTAINS

  43. POLISH VANCOUVER ISLAND

  44. STRIATIONS LAKE CHELAN

  45. GROOVES VANCOUVER ISLAND

  46. ROCHES MOUTONEES BEARTOOTH MOUNTAINS

  47. ARETES WALLOWA MOUNTAINS

  48. HORNS ABSAROKA MOUNTAINS

  49. COLS TETON RANGE

  50. HANGING VALLEYS & TRUNCATED SPURS BEARTOOTH MOUNTAINS

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