Sheridan and Sherman Glaciers, Chugach Mtns.

South Sawyer Glacier- 1999

SOUTHEAST ALASKA

ICE

VEGETATION

ROCK/SOIL

Landsat Thematic Mapper (TM) bands

redgreenbluecomputer display:

Landsat Thematic Mapper (TM) bands

near infrared

thermal infrared

SOUTHEAST ALASKA

ICE

VEGETATION

ROCK/SOIL

Juneau Icefield

Digital elevation model (DEM)

sea level

met

ers

Landsat Thematic Mapper image superimposed ondigital elevation model

Juneau Icefield

Juneau Icefield

Juneau Icefield

Region of the Mendenhall Glacier

Mendenhall Glacier

Recent glacier retreat

calvingterminus

South Sawyer Glacier- 1999

trim line- 1988

snowlinelast winter’s snow:accumulation zone

melting ice:ablation zone

Lemon Creek Glacier

Juneau Icefield

Region of the Taku Glacier

Taku Glacier

ablation zone

Taku Glacieraccumulation zone

terminus

outwash

terminus of Taku Glacier

Juneau Icefield

Region of the Gilkey Glacier

Gilkey Glacier

Vaughn Lewis Icefall

Vaughn Lewis Icefall

Clouds and cloud shadows

ogives

Vaughn Lewis ice fall

ogives

Vaughn Lewis icefall

Un-named glacier tributary to Gilkey

Vaughn Lewis icefall:severe extensional deformation producing open cracks, increasingsurface area

medial moraines

ogives

Looking down the Gilkey Glacier

enhanced TM image of ogives

tent

hanging glaciers

valley glacier

terminus

cirque glacier

cirquehanging glacier

arete ridge

horn

ogive

Childs Glacier, calving into Copper River

snowlines

terminus

Earthquake triggered Rockfall covering terminus of glacier

Sheridan and Sherman Glaciers, Chugach Mtns.

pro-glacial lake

SOUTHEAST ALASKA

ICE

VEGETATION

ROCK/SOILGlacier Bay

1780

1794

1860

1907

1980

Record of Glacier Bay Terminus Changes

1986 Landsat MSS image

10 km