Buffering-based approach to fluctuation analysis of glacier calving fronts using LANDSAT-7 ETM+, with a case study of Jakobshavn Isbræ

Seongsu Jeong, Jaehoon Jung, Sangmin Kim, Sungchul Hong, Hong Gyoo Sohn, Joon Heo

Research output: Contribution to journalArticle

Abstract

The annual or seasonal fluctuation of glacier calving fronts has been carefully mapped and measured, due to this property's close correlation with overall glacier behavior. For that purpose, remote sensing data is the most useful tool; however, LANDSAT-7 ETM+ images, a popular dataset, has been losing parts of its data since May 2003, due to a scan line corrector (SLC) failure of the ETM+ sensor. Therefore, calving front mapping with later LANDSAT-7 ETM+ data requires interpolation or pre-processing. To overcome these issues, we present a novel approach based on line-buffering in a GIS (Geographic Information System) environment. In applying this method to a time-series of the Jakobshavn Isbræ's glacier front position in West Greenland, we proved this approach to be more objective and robust than alternative methodologies; its shape similarity measure, moreover, was shown to be highly useful. Additionally, a simulation series was carried out, which established that the buffering-based method successfully estimated, with high objectivity, both mean displacement and shape similarity from a pair of calving fronts delineated from the SLC-off data without any modification. Further analyses of Jakobshavn Isbræ based on the buffering-based approach revealed that the frontal advance during a winter season preceding a period of high rates of retreat fails to balance the recession of the previous summer. Moreover, based on analyses of the shape similarity of sequential calving fronts, it was determined that a rapid retreat is likely accompanied by a significant change in calving front shape.

Original languageEnglish
Pages (from-to)115-125
Number of pages11
JournalComputers and Geosciences
Volume64
DOIs
Publication statusPublished - 2014 Mar 1

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Glaciers
buffering
glacier
Geographic information systems
Time series
Remote sensing
Interpolation
Sensors
Processing
interpolation
analysis
time series
sensor
remote sensing
methodology
winter
summer
simulation

All Science Journal Classification (ASJC) codes

  • Information Systems
  • Computers in Earth Sciences

Cite this

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title = "Buffering-based approach to fluctuation analysis of glacier calving fronts using LANDSAT-7 ETM+, with a case study of Jakobshavn Isbr{\ae}",
abstract = "The annual or seasonal fluctuation of glacier calving fronts has been carefully mapped and measured, due to this property's close correlation with overall glacier behavior. For that purpose, remote sensing data is the most useful tool; however, LANDSAT-7 ETM+ images, a popular dataset, has been losing parts of its data since May 2003, due to a scan line corrector (SLC) failure of the ETM+ sensor. Therefore, calving front mapping with later LANDSAT-7 ETM+ data requires interpolation or pre-processing. To overcome these issues, we present a novel approach based on line-buffering in a GIS (Geographic Information System) environment. In applying this method to a time-series of the Jakobshavn Isbr{\ae}'s glacier front position in West Greenland, we proved this approach to be more objective and robust than alternative methodologies; its shape similarity measure, moreover, was shown to be highly useful. Additionally, a simulation series was carried out, which established that the buffering-based method successfully estimated, with high objectivity, both mean displacement and shape similarity from a pair of calving fronts delineated from the SLC-off data without any modification. Further analyses of Jakobshavn Isbr{\ae} based on the buffering-based approach revealed that the frontal advance during a winter season preceding a period of high rates of retreat fails to balance the recession of the previous summer. Moreover, based on analyses of the shape similarity of sequential calving fronts, it was determined that a rapid retreat is likely accompanied by a significant change in calving front shape.",
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Buffering-based approach to fluctuation analysis of glacier calving fronts using LANDSAT-7 ETM+, with a case study of Jakobshavn Isbræ. / Jeong, Seongsu; Jung, Jaehoon; Kim, Sangmin; Hong, Sungchul; Sohn, Hong Gyoo; Heo, Joon.

In: Computers and Geosciences, Vol. 64, 01.03.2014, p. 115-125.

Research output: Contribution to journalArticle

TY - JOUR

T1 - Buffering-based approach to fluctuation analysis of glacier calving fronts using LANDSAT-7 ETM+, with a case study of Jakobshavn Isbræ

AU - Jeong, Seongsu

AU - Jung, Jaehoon

AU - Kim, Sangmin

AU - Hong, Sungchul

AU - Sohn, Hong Gyoo

AU - Heo, Joon

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