Glacier changes in the circumpolar Arctic and sub-Arctic, mid-1980s to late-2000s/2011

Sebastian H. Mernild, Jeppe K. Malmros, Jacob C. Yde, Simon De Villiers, Niels Tvis Knudsen, Ryan Wilson

Research output: Contribution to journalArticle

2 Citations (Scopus)

Abstract

A new inventory record of satellite-derived area, length, elevation range and surface slope changes from the mid-1980s to late 2000s/2011 for 317 land-terminating glaciers and ice caps (GIC) is presented. The investigated GIC are located in 12 geographic regions throughout the circumpolar Arctic and sub-Arctic. This geographic subdivision allows us to examine regional variations in recent glacier changes. The method is based on a semi-automated classification approach which extracts GIC extent from satellite scenes. Most of the observed GIC show a reduction in area, length, elevation range and slope. On regional scale, the observed GIC changed in area between −4 ± 3% (Nuuk, West Greenland; 1987–2003) and −40 ± 4% (Talkeetna, southern Alaska; 1987–2011), equal to shrinking rates between −0.2% yr−1 and −1.7% yr−1. The regional change in length was between −36 ± 13 m (southern British Columbia; 1985–2011) and −481 ± 85 m (southern Ellesmere Island; 1988–2009), equal to −1 ± 0.5 m yr−1 and −23 ± 4 m yr−1. Regional GIC changes can be illustrated by power-law scaling relationships between GIC area and length, elevation range, and surface slope. Here, we find regional variability in scaling parameters in both time and space, which should be considered when estimating global assessments of GIC conditions and changes over time.
Original languageEnglish
Pages (from-to)39-56
Number of pages18
JournalGeografisk Tidsskrift
Volume115
Issue number1
Early online date30 Apr 2015
DOIs
Publication statusPublished - 2015
Externally publishedYes

Fingerprint

Arctic
ice cap
glacier
scaling
regional difference
Law
power law
time

Cite this

Mernild, Sebastian H. ; Malmros, Jeppe K. ; Yde, Jacob C. ; De Villiers, Simon ; Knudsen, Niels Tvis ; Wilson, Ryan. / Glacier changes in the circumpolar Arctic and sub-Arctic, mid-1980s to late-2000s/2011. In: Geografisk Tidsskrift. 2015 ; Vol. 115, No. 1. pp. 39-56.
@article{dbc880ea1c604802918b7652a799a346,
title = "Glacier changes in the circumpolar Arctic and sub-Arctic, mid-1980s to late-2000s/2011",
abstract = "A new inventory record of satellite-derived area, length, elevation range and surface slope changes from the mid-1980s to late 2000s/2011 for 317 land-terminating glaciers and ice caps (GIC) is presented. The investigated GIC are located in 12 geographic regions throughout the circumpolar Arctic and sub-Arctic. This geographic subdivision allows us to examine regional variations in recent glacier changes. The method is based on a semi-automated classification approach which extracts GIC extent from satellite scenes. Most of the observed GIC show a reduction in area, length, elevation range and slope. On regional scale, the observed GIC changed in area between −4 ± 3{\%} (Nuuk, West Greenland; 1987–2003) and −40 ± 4{\%} (Talkeetna, southern Alaska; 1987–2011), equal to shrinking rates between −0.2{\%} yr−1 and −1.7{\%} yr−1. The regional change in length was between −36 ± 13 m (southern British Columbia; 1985–2011) and −481 ± 85 m (southern Ellesmere Island; 1988–2009), equal to −1 ± 0.5 m yr−1 and −23 ± 4 m yr−1. Regional GIC changes can be illustrated by power-law scaling relationships between GIC area and length, elevation range, and surface slope. Here, we find regional variability in scaling parameters in both time and space, which should be considered when estimating global assessments of GIC conditions and changes over time.",
keywords = "area change, Arctic, glacier, ice caps, landsat, length change, Remote sensing",
author = "Mernild, {Sebastian H.} and Malmros, {Jeppe K.} and Yde, {Jacob C.} and {De Villiers}, Simon and Knudsen, {Niels Tvis} and Ryan Wilson",
year = "2015",
doi = "10.1080/00167223.2015.1026917",
language = "English",
volume = "115",
pages = "39--56",
journal = "Geografisk Tidsskrift",
issn = "0016-7223",
publisher = "Royal Danish Geographical Society",
number = "1",

}

Glacier changes in the circumpolar Arctic and sub-Arctic, mid-1980s to late-2000s/2011. / Mernild, Sebastian H.; Malmros, Jeppe K.; Yde, Jacob C.; De Villiers, Simon; Knudsen, Niels Tvis; Wilson, Ryan.

In: Geografisk Tidsskrift, Vol. 115, No. 1, 2015, p. 39-56.

Research output: Contribution to journalArticle

TY - JOUR

T1 - Glacier changes in the circumpolar Arctic and sub-Arctic, mid-1980s to late-2000s/2011

AU - Mernild, Sebastian H.

AU - Malmros, Jeppe K.

AU - Yde, Jacob C.

AU - De Villiers, Simon

AU - Knudsen, Niels Tvis

AU - Wilson, Ryan

PY - 2015

Y1 - 2015

N2 - A new inventory record of satellite-derived area, length, elevation range and surface slope changes from the mid-1980s to late 2000s/2011 for 317 land-terminating glaciers and ice caps (GIC) is presented. The investigated GIC are located in 12 geographic regions throughout the circumpolar Arctic and sub-Arctic. This geographic subdivision allows us to examine regional variations in recent glacier changes. The method is based on a semi-automated classification approach which extracts GIC extent from satellite scenes. Most of the observed GIC show a reduction in area, length, elevation range and slope. On regional scale, the observed GIC changed in area between −4 ± 3% (Nuuk, West Greenland; 1987–2003) and −40 ± 4% (Talkeetna, southern Alaska; 1987–2011), equal to shrinking rates between −0.2% yr−1 and −1.7% yr−1. The regional change in length was between −36 ± 13 m (southern British Columbia; 1985–2011) and −481 ± 85 m (southern Ellesmere Island; 1988–2009), equal to −1 ± 0.5 m yr−1 and −23 ± 4 m yr−1. Regional GIC changes can be illustrated by power-law scaling relationships between GIC area and length, elevation range, and surface slope. Here, we find regional variability in scaling parameters in both time and space, which should be considered when estimating global assessments of GIC conditions and changes over time.

AB - A new inventory record of satellite-derived area, length, elevation range and surface slope changes from the mid-1980s to late 2000s/2011 for 317 land-terminating glaciers and ice caps (GIC) is presented. The investigated GIC are located in 12 geographic regions throughout the circumpolar Arctic and sub-Arctic. This geographic subdivision allows us to examine regional variations in recent glacier changes. The method is based on a semi-automated classification approach which extracts GIC extent from satellite scenes. Most of the observed GIC show a reduction in area, length, elevation range and slope. On regional scale, the observed GIC changed in area between −4 ± 3% (Nuuk, West Greenland; 1987–2003) and −40 ± 4% (Talkeetna, southern Alaska; 1987–2011), equal to shrinking rates between −0.2% yr−1 and −1.7% yr−1. The regional change in length was between −36 ± 13 m (southern British Columbia; 1985–2011) and −481 ± 85 m (southern Ellesmere Island; 1988–2009), equal to −1 ± 0.5 m yr−1 and −23 ± 4 m yr−1. Regional GIC changes can be illustrated by power-law scaling relationships between GIC area and length, elevation range, and surface slope. Here, we find regional variability in scaling parameters in both time and space, which should be considered when estimating global assessments of GIC conditions and changes over time.

KW - area change

KW - Arctic

KW - glacier

KW - ice caps

KW - landsat

KW - length change

KW - Remote sensing

U2 - 10.1080/00167223.2015.1026917

DO - 10.1080/00167223.2015.1026917

M3 - Article

VL - 115

SP - 39

EP - 56

JO - Geografisk Tidsskrift

JF - Geografisk Tidsskrift

SN - 0016-7223

IS - 1

ER -