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You are browsing the archive for Antarctic Glacier retreat Archives - AGU Blogosphere.

23 November 2020

Coley Glacier and Sjögren Glacier, Antarctic Peninsula Exhibit Rapid Melt Feb. 2020

Coley Glacier in Landsat images from Feb. 4, 2020 and Feb. 13, 2020. Magenta dots indicate the snowline The impact of a period of record warm weather over the Antarctic Peninsula during February 2020 was rapid development of melt features and expansion of melt area on many glaciers near the tip of the Peninsula, where the temperature records were set at Esperenza and Marambio Base. Here we examine Landsat imagery at Coley …

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18 May 2020

Talking about Iceberg Melt Rates and Glacier Frontal Ablation: Seller and Heim Glacier, Antarctica

Figure 1: Study sites considered in this article: Seller Glacier and Heim Glacier (Landsat-8 image courtesy of the U.S. Geological Survey) Post by Mariama Dryak Iceberg melt is caused by the temperature of the water in which an iceberg floats and the velocity of the water flowing around the iceberg. As a result, iceberg melt is an excellent indicator for the ocean conditions in which an iceberg resides. Given the …

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5 May 2020

Huron Glacier Retreat, Livingston Island, Antarctica 2001-2020

Huron Glacier (H) and Kaliakra Glacier (K) in 2001 and 2020 Landsat images.  Extensive retreat at bedrock locations Point A and B with limited retreat at C and D. Livingston Island, Antarctica is part of the South Shetland Island chain and is primarily covered by glaciers.  At the eastern end is Huron Glacier. Huron Glacier and the adjacent Kaliakra Glacier are tidewater outlet glaciers terminating in Moon Bay on the …

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19 February 2020

Boydell Glacier Accumulation Zone Rapid Melt Feature Development February 2020

Boydell Glacier terminates at the island adjacent to Point A.  The accumulation zone between Point A, B and C is on January 12, 2020 has limited gray area indicating bare firn.  By Feb. 13 there is considerable cobalt blue snow/firn areas saturated with melt water. The yellow dots mark the margin of the ice sheet and pink dots the margin of the ablation zone on Feb. 13, 2020.  The Boydell …

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17 February 2020

Record Antarctic Temperatures in Feb. 2020 Impact on Eagle Island Ice Cap

Eagle Island Ice Cap, Antarctica in Landsat images from Feb. 4, 2020 and Feb. 13, 2020.  Point E indicates an are area of snow/firn that is saturated with meltwater. Point A and B indicate locations where the amount of bare rock/ground and hence albedo have changed dramatically. This post was source for an article by Kasha Patel published by NASA Earth Observatory, CNN and Washington Post. The impact of period …

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11 February 2020

Eyrie Bay, Antarctic Peninsula Retreat 2000-2020

From REMA Landsat images from Feb. 2016 and Oct. 2019 indicating the front of the Cugnot Ice Piedmont (CP)  and Broad Valley (BV) ice fronts in Eyrie Bay.  Point A, B, and C indicate specific bedrock knobs near the ice front.  Point D is just south of a side glacier entering the bay. Eyrie Bay is near the tip of the Antarctic Peninsula and is rimmed by tidewater glaciers including …

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31 October 2019

Ongoing Evolution of Fleming Glacier, Antarctica

Fleming Glacier in 2000 and 2019 Landsat images. The 2000 glacier front is marked by red arrows on the north and south margin and red dots along the front. The 2019 glacier front is marked by yellow arrows and yellow dots. During the 1980’s the glaciologic community was focused on increasing our baseline information and monitoring of Antarctic ice shelves. An understanding that  ice shelves had  a critical role along …

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13 February 2019

Boydell Glacier, Antarctica Rapid Retreat 2001-2017

Boydell Glacier, Antarctica retreat in Landsat images from 2001 and 2017,  terminus in 2001 at red dots in 2017 at yellow dots.  A-E are reference points.  Boydell Glacier flows east from the northern Antarctic Peninsula and prior to the 1980’s was joined with the Sjogren Glacier as a principal feeder glacier to Prince Gustav Ice Shelf.  This 1600 square kilometer ice shelf connecting the Peninsula to James Ross Island disintegrated in the …

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16 January 2019

Cape Longing, Antarctica Transitioning to Island via Glacier Retreat

Cape Longing, Antarctica in 2001 and 2018 Landsat images. Point A-G are at specific locations. Yellow dots mark the margin of the glacier connecting the Cape to the main Antarctic Peninsula. Cape Longing is on the Antarctic Peninsula between Larsen Inlet and Prince Gustav Channel.  Larsen Inlet along the south shore of Cape Longing was covered by the Larsen A Ice Shelf until its collapse in 1995. The Prince Gustav …

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7 January 2019

Muller Ice Shelf, Antarctica 2018 Calving Event

Comparison of the ice front-yellow dots, icebergs-pink arrow and rifting-blue arrow in March 2018 and November 2018 Landsat images. A=Antevs Glacier, B=Bruckner Glacier, H=Humphreys Island and M=Muller Ice Shelf. New iceberg is at the lowest pink arrow adjacent to western calving front. Muller Ice Shelf is on the west side of the Antarctic Peninsula and  is one of the smallest remaining ice shelves covering 40 km2 in 2007. It is …

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3 April 2018

Warsaw Icefield, King George Is., Antarctica Retreating from Shoreline

Warsaw Icefield, King George Island, Antarctica glacier retreat and nunatak expansion in 1989, 2001 and 2018 Landsat images. E=Ecology Glacier, B=Baranowski Glacier, W=Windy Glacier, 1989 terminus locations indicated by red arrows.  Point A & B are nunataks.  The Arctowski Polish Research Station is located on a relatively large ice-free oasis northeast of the Warsaw Icefield on King George Island, Antarctica. The station is on Admiralty Bay where  Ecological monitoring has been …

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8 December 2017

Muller Ice Shelf, Antarctica Retreat and Rift Zone Expansion

Muller Ice Shelf (M) in 1989 and 2017 Landsat images fed by the Antevs (A) and Bruckner Glacier (B). The ice front is shown with yellow dots with separate calving margins on either side of Humphrey Island (H).  The blue arrow indicates a developing rifted zone of melange ice.  The pink arrows point out icebergs among sea ice.  Muller Ice Shelf is on the west side of the Antarctic Peninsula …

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26 March 2017

Depot & Mondor Glacier Retreat, Antarctic Peninsula

Mondor and  (M) and Depot Glacier (D) at the tip of the Antarctic Peninsula in Landsat imagers from 1988, 2000 and 2017.  Yellow arrows indicates the 2017 terminus location of each.  The purple arrow indicates a bedrock ridge that has been expanding. On the Trinity Peninsula,which is the region at the tip of the Antarctic Peninsula, are Depot and Mondor that flow north and south from the same accumulation zone …

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28 October 2016

Coley Glacier Retreat, James Ross Island, Antarctica

Coley Glacier terminus comparsion in Landsat images from 2000 (red arrows) and 2016 (yellow arrow)  indicating a retreat of 2 km along the western side and 1 km along the eastern side.  Purple dots indicate the transient snowline and the purple arrow an area of debris exposed with glacier thinning.  Coley Glacier is a tidewater glacier on the northeast side of James Ross Island near the tip of the Antarctic …

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21 July 2016

Sjögren Glacier Fast Flow, Fast Retreat, Antarctica

Sjögren Glacier comparison in Landsat images from 2001 and 2016, red dots indicate terminus position, Point A, B, C and D are in fixed locations.  Sjögren Glacier flows east from the northern Antarctic Peninsula and prior to the 1980’s was a principal feeder glacier to Prince Gustav Ice Shelf.  This 1600 square kilometer ice shelf disintegrated in the mid-1990’s and was gone in 1995 (Cook and Vaughan, 2010). Scambos et al (2014) …

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11 April 2016

Nansen Ice Shelf, Antarctica Calving Event Occurs April 2016

Nansen Ice Shelf just north of Dryglaski Ice Tongue on April 2 with evident rift,blue arrows, and after calving two icebergs on April 7, A and B. Images from NASA MODIS The NIWA reported a calving event from the Nansen Ice Shelf on April 11, 2016.  They are concerned about a mooring in Terra Nova Bay in front of the ice shelves. The area of the Nansen Ice Shelf is …

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30 March 2016

Stange Ice Shelf, Antarctica, Maintains Stability 1989-2016

    Stange Ice Shelf, Antarctica in 2016 Landsat image.  Five rift zones are mentioned two  by the southern ice front R3 and R4.  Two by the central ice front R1 and R2. Purple dots mark ice front and yellow and red arrow the 1989 frontal positions on the north and south side of Case Island Holt et al (2014) provide an exemplary examination of the dynamics from 1973 to …

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7 March 2016

Coronation Island Glacier Retreat, South Orkney Islands

Lewis Glacier (S) and Sunshine Glacier (S) on Coronation Island in 1990 and 2015.  Red arrow is 1990 terminus location and yellow arrow the 2015 terminus location.   Sunshine and Lewis Glacier are tidewater glaciers on the south side of Coronation Island in the South Orkney Islands.  This is an area of excessive cloud cover leading to few available satellite images illustrating glacier change.  A map of the glaciers from the …

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4 January 2016

Endurance Glacier, Elephant Island Retreat

Landsat comparison from 1990 and 2015 of Endurance Glacier, Elephant Island-Embayment development east and west side of calving terminus.  Endurance Glacier is the main outlet glacier of this heavily glaciated island of the South Shetland Islands. The name of the island comes from the numerous elephant seals. The name of the glacier comes from the Ernest Shackleton and his crew from the Endurance reaching the island in 1916 after a …

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24 September 2015

Pine Island Releases New Iceberg after Austral Winter 2015

NASA MODIS Image from Sept. 24, 2015 showing new iceberg at calving front of Pine Island Glacier, Antarctica In the MODIS images from the NASA Rapid Response image sets below you can see the lack of rifting in February, 2015 and April, 2015 that will lead at the calving front where the iceberg will break off that is evident on Sept. 24, 2015.  A new iceberg was reported having calved …

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