Advertisement

You are browsing the archive for southeast alaska glacier retreat Archives - AGU Blogosphere.

20 May 2019

Chickamin Glacier, Alaska Retreat Generates Separation and Lake Expansion

Chickamin Glacier, Alaska in 1985 and 2018 Landsat images indicating the 3.5 km retreat and associated lake expansion. Red arrow is 1985 terminus location, yellow arrow is the 2018 terminus location, pink arrow is former junction area with Through Glacier.  The purple dots indicate the snowline.  Point 1 and 2 are locations of bedrock expansion above the equilibrium line altitude.  Chickamin Glacier in southeast Alaska glacier drains south from an …

Read More >>


21 November 2017

Bridge Glacier, Southeast Alaska Retreat & Lake Formation

Bridge Glacier in Landsat image from 1984 and Sentinel image from 2017. The red arrow indicates the 1984 terminus where no lake exists, yellow arrow is 2017 terminus, orange arrows are selected tributaries and purple dots the snowline.  Bridge Glacier drains the same icefield as the Wright and Speel Glacier 45 km southeast of Juneau, Alaska. Here we examine the changes in this glacier from 1984-2017 using Landsat and Sentinel imagery. In 1984 the …

Read More >>


7 December 2014

Sinclair Glacier Retreat, Alaska

Sinclair Mountain is on the east side of the Lynn Canal in southeast Alaska. The mountains hosts too substantial glacier, the south flowing unnamed glacier is referred to here as Sinclair Glacier. This glacier terminated in a lake in the 1982 map of the Skagway region. I observed this glacier from the air in 1982 and it was ending in this lake. Here we examine Landsat imagery from 1984 to …

Read More >>


30 June 2014

West Speel Glacier Retreat and Lake Formation, Southeast Alaska

West Speel Glacier is an unnamed glacier that drains the same icefield as the Wright and Speel Glacier 45 km southeast of Juneau, Alaska. Here we examine the changes in this glacier from 1984-2013 using Landsat imagery. Google Earth image In 1984 the glacier ended on an outwash plain at the head of a branch of Speel River. The red arrow indicates the 1984 terminus for each image, the purple …

Read More >>


10 December 2013

Gracey Creek Glacier Retreat and Tributary Loss, Alaska

Gracey Creek Glacier is a small glacier in southeast Alaska that terminates near the Canadian border. The glacier’s main terminus is the northern terminus (red arrow), though it has southern terminus as well (purple dot), both drain into Behm Canal via different rivers. Here we examine Landsat images from 1987 to 2013 to identify retreat and tributary separation in the last quarter century. USGS map of Gracey Creek Glacier Google …

Read More >>