Coastal-change and glaciological map of the Saunders Coast area, Antarctica: 1972–97

Ferrigno, Jane G.; Williams, Richard S.; Foley, Kevin M.

doi:10.3189/172756404781814285

Cited by 7 publications

(7 citation statements)

References 16 publications

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“…The area around the Sulzberger Ice Shelf is characterized by the fast moving Land Glacier (about 1.6 km/yr) and the slower moving glaciers (10-200 m/yr) flowing into the Nickerson (60 km wide) and Sulzberger Ice Shelf (more than 100 km wide) [29,30]. A huge ice shelf with a length of 400 km is represented by the Shackleton Ice Shelf site [31] with changing sea ice conditions.…”

Section: Study Areasmentioning

confidence: 99%

“…The current calving front fluctuations show in some cases contrasting tendencies compared to previous observations. The Getz Ice Shelf was described as a pretty stable ice shelf with phases of slight retreat and advance [29]. DeVicq Glacier is one of the fast flowing glaciers along Marie Byrd Land [42].…”

Section: Time Series Of Getz Ice Shelfmentioning

confidence: 99%

“…DeVicq Glacier is one of the fast flowing glaciers along Marie Byrd Land [42]. Between 1973 and 1988, the glacier retreated 5 km [43], and 18.6 km between 1973 and 1997 [29]. Compared to available coastline products (see Section 3.3 for products), the retreat from the maximum extent in 1973 decreased slightly in the 1980s and further until 1997.…”

Section: Time Series Of Getz Ice Shelfmentioning

confidence: 99%

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Automated Extraction of Antarctic Glacier and Ice Shelf Fronts from Sentinel-1 Imagery Using Deep Learning

et al. 2019

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Sea level rise contribution from the Antarctic ice sheet is influenced by changes in glacier and ice shelf front position. Still, little is known about seasonal glacier and ice shelf front fluctuations as the manual delineation of calving fronts from remote sensing imagery is very time-consuming. The major challenge of automatic calving front extraction is the low contrast between floating glacier and ice shelf fronts and the surrounding sea ice. Additionally, in previous decades, remote sensing imagery over the often cloud-covered Antarctic coastline was limited. Nowadays, an abundance of Sentinel-1 imagery over the Antarctic coastline exists and could be used for tracking glacier and ice shelf front movement. To exploit the available Sentinel-1 data, we developed a processing chain allowing automatic extraction of the Antarctic coastline from Seninel-1 imagery and the creation of dense time series to assess calving front change. The core of the proposed workflow is a modified version of the deep learning architecture U-Net. This convolutional neural network (CNN) performs a semantic segmentation on dual-pol Sentinel-1 data and the Antarctic TanDEM-X digital elevation model (DEM). The proposed method is tested for four training and test areas along the Antarctic coastline. The automatically extracted fronts deviate on average 78 m in training and 108 m test areas. Spatial and temporal transferability is demonstrated on an automatically extracted 15-month time series along the Getz Ice Shelf. Between May 2017 and July 2018, the fronts along the Getz Ice Shelf show mostly an advancing tendency with the fastest moving front of DeVicq Glacier with 726 ± 20 m/yr.

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Section: Study Areasmentioning

confidence: 99%

Section: Time Series Of Getz Ice Shelfmentioning

confidence: 99%

Section: Time Series Of Getz Ice Shelfmentioning

confidence: 99%

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Automated Extraction of Antarctic Glacier and Ice Shelf Fronts from Sentinel-1 Imagery Using Deep Learning

et al. 2019

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“…Ferrigno [39] could not detect clear trends between 1970-1990 for Mary Byrd and Ellsworth Land along the WAIS based on Landsat imagery. Also, a later study detected advances in some parts of Mary Byrd Land and retreats in others [126]. The most recent study on CFL dynamics only covers a small part of the Amundsen Sea Embayment, but the prolonged Landsat time-series until 2011 reveals a retreat of major glaciers such as Thwaites, Smith, Pine Island, and Haynes [30].…”

Section: Regional Calving Front Studiesmentioning

confidence: 97%

Remote Sensing of Antarctic Glacier and Ice-Shelf Front Dynamics—A Review

et al. 2018

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The contribution of Antarctica’s ice sheet to global sea-level rise depends on the very dynamic behavior of glaciers and ice shelves. One important parameter of ice-sheet dynamics is the location of glacier and ice-shelf fronts. Numerous remote sensing studies on Antarctic glacier and ice-shelf front positions exist, but no long-term record on circum-Antarctic front dynamics has been established so far. The article outlines the potential of remote sensing to map, extract, and measure calving front dynamics. Furthermore, this review provides an overview of the spatial and temporal availability of Antarctic calving front observations for the first time. Single measurements are compiled to a circum-Antarctic record of glacier and ice shelf retreat/advance. We find sufficient frontal records for the Antarctic Peninsula and Victoria Land, whereas on the West Antarctic Ice Sheet (WAIS), measurements only concentrate on specific glaciers and ice sheets. Frontal records for the East Antarctic Ice Sheet exist since the 1970s. Studies agree on the general retreat of calving fronts along the Antarctic Peninsula. East Antarctic calving fronts also showed retreating tendencies between 1970s until the early 1990s, but have advanced since the 2000s. Exceptions of this general trend are Victoria Land, Wilkes Land, and the northernmost Dronning Maud Land. For the WAIS, no clear trend in long-term front fluctuations could be identified, as observations of different studies vary in space and time, and fronts highly fluctuate. For further calving front analysis, regular mapping intervals as well as glacier morphology should be included. We propose to exploit current and future developments in Earth observations to create frequent standardized measurements for circum-Antarctic assessments of glacier and ice-shelf front dynamics in regard to ice-sheet mass balance and climate forcing.

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“…This ice shelf is 160 km wide at its calving front and is 100 km long from its inland grounding line to its ice front. Because it fringes a rugged mountainous section of the Antarctic continent, the SIS is one of the slowest-moving ice shelves in Marie Byrd Land (Ferrigno and others, 2004). It is riddled with numerous islands and ice rises, where ice-shelf flow is interrupted and where ice-flow suture zones are formed providing lines of weakness along which iceberg detachment fractures are likely to occur.…”

Section: Introductionmentioning

confidence: 99%

Antarctic ice-shelf calving triggered by the Honshu (Japan) earthquake and tsunami, March 2011

Brunt¹,

Okal

MacAyeal

2011

J. Glaciol.

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ABSTRACT. We use European Space Agency Envisat data to present the first observational evidence that a Northern Hemisphere tsunami triggered Antarctic ice-shelf calving more than 13 000 km away. The Honshu tsunami of 11 March 2011 traversed the Pacific Ocean in <18 hours where it impinged on the Sulzberger Ice Shelf, resulting in the calving of 125 km 2 of ice from a shelf front that had previously been stable for >46 years. This event further illustrates the growing evidence of ocean-wave impact on Antarctic calving and emphasizes the teleconnection between the Antarctic ice sheet and events as far away as the Northern Hemisphere.

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Coastal-change and glaciological map of the Saunders Coast area, Antarctica: 1972–97

Abstract: Satellite images from 1972 to 1997 have been used to prepare a map showing glaciological features of the Saunders Coast area, Antarctica. Analysis of the imagery shows a trend toward ice-front retreat that may be a result of changing environmental conditions.

Cited by 7 publications

References 16 publications

Automated Extraction of Antarctic Glacier and Ice Shelf Fronts from Sentinel-1 Imagery Using Deep Learning

Automated Extraction of Antarctic Glacier and Ice Shelf Fronts from Sentinel-1 Imagery Using Deep Learning

Remote Sensing of Antarctic Glacier and Ice-Shelf Front Dynamics—A Review

Antarctic ice-shelf calving triggered by the Honshu (Japan) earthquake and tsunami, March 2011

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