Glacier Surface Type - Svalbard

On many glaciers in Svalbard, three surface types are visible on SAR images, the dark glacier ice at the glacier's lower end, the brighter superimposed ice in the middle, and the white firn at the higher elevations. Surface classification of these types is valuable especially since the retreat...

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Bibliographic Details
Main Author: König, Max
Format: Dataset
Language:unknown
Published: Norwegian Polar Institute 2013
Subjects:
Online Access:http://data.npolar.no/dataset/d756f766-de33-11e2-8993-005056ad0004
id npolardata:oai:npolar.no:dataset/d756f766-de33-11e2-8993-005056ad0004
record_format openpolar
spelling npolardata:oai:npolar.no:dataset/d756f766-de33-11e2-8993-005056ad0004 2024-03-03T22:15:37+00:00 Glacier Surface Type - Svalbard König, Max BEGINDATE: 1992-01-01 ENDDATE: ENVELOPE(9.0,30.0,81.0,76.0) 2013-06-26 text/html application/zip http://data.npolar.no/dataset/d756f766-de33-11e2-8993-005056ad0004 unknown Norwegian Polar Institute GEOSCIENTIFIC INFORMATION Surface Type Firn superimposed ice glacier ice glaciology EARTH SCIENCE CLIMATE INDICATORS CRYOSPHERIC INDICATORS GLACIAL MEASUREMENTS GLACIER FACIES CRYOSPHERE GLACIERS/ICE SHEETS GLACIERS Dataset 2013 npolardata 2022-10-11T15:28:32Z On many glaciers in Svalbard, three surface types are visible on SAR images, the dark glacier ice at the glacier's lower end, the brighter superimposed ice in the middle, and the white firn at the higher elevations. Surface classification of these types is valuable especially since the retreat or advance of the firn area provides information on the status of the glacier. While the snowline reacts immediately to annual changes, the firn area smoothes out these short-term changes and shows, similar to the glacier front, longer-term changes of the glaciers. GST uses a Otsu three-category algorithm to separate the image into these three surface types for selected Svalbard glaciers. The method works very well on glacier with distinct surface types, the main weakness is crevasses and rough areas being classifed as superimposed ice. A quality number indicates if an individual classification is ideal (1), good (2) or of medium quality (3). The quality number mainly indicates how much crevasses are classified as superimposed ice. The firn area should be displayed correctly for all selected glaciers. Dataset glacier Svalbard Norwegian Polar Data Centre Svalbard ENVELOPE(9.0,30.0,81.0,76.0)
institution Open Polar
collection Norwegian Polar Data Centre
op_collection_id npolardata
language unknown
topic GEOSCIENTIFIC INFORMATION
Surface Type
Firn
superimposed ice
glacier ice
glaciology
EARTH SCIENCE
CLIMATE INDICATORS
CRYOSPHERIC INDICATORS
GLACIAL MEASUREMENTS
GLACIER FACIES
CRYOSPHERE
GLACIERS/ICE SHEETS
GLACIERS
spellingShingle GEOSCIENTIFIC INFORMATION
Surface Type
Firn
superimposed ice
glacier ice
glaciology
EARTH SCIENCE
CLIMATE INDICATORS
CRYOSPHERIC INDICATORS
GLACIAL MEASUREMENTS
GLACIER FACIES
CRYOSPHERE
GLACIERS/ICE SHEETS
GLACIERS
König, Max
Glacier Surface Type - Svalbard
topic_facet GEOSCIENTIFIC INFORMATION
Surface Type
Firn
superimposed ice
glacier ice
glaciology
EARTH SCIENCE
CLIMATE INDICATORS
CRYOSPHERIC INDICATORS
GLACIAL MEASUREMENTS
GLACIER FACIES
CRYOSPHERE
GLACIERS/ICE SHEETS
GLACIERS
description On many glaciers in Svalbard, three surface types are visible on SAR images, the dark glacier ice at the glacier's lower end, the brighter superimposed ice in the middle, and the white firn at the higher elevations. Surface classification of these types is valuable especially since the retreat or advance of the firn area provides information on the status of the glacier. While the snowline reacts immediately to annual changes, the firn area smoothes out these short-term changes and shows, similar to the glacier front, longer-term changes of the glaciers. GST uses a Otsu three-category algorithm to separate the image into these three surface types for selected Svalbard glaciers. The method works very well on glacier with distinct surface types, the main weakness is crevasses and rough areas being classifed as superimposed ice. A quality number indicates if an individual classification is ideal (1), good (2) or of medium quality (3). The quality number mainly indicates how much crevasses are classified as superimposed ice. The firn area should be displayed correctly for all selected glaciers.
format Dataset
author König, Max
author_facet König, Max
author_sort König, Max
title Glacier Surface Type - Svalbard
title_short Glacier Surface Type - Svalbard
title_full Glacier Surface Type - Svalbard
title_fullStr Glacier Surface Type - Svalbard
title_full_unstemmed Glacier Surface Type - Svalbard
title_sort glacier surface type - svalbard
publisher Norwegian Polar Institute
publishDate 2013
url http://data.npolar.no/dataset/d756f766-de33-11e2-8993-005056ad0004
op_coverage BEGINDATE: 1992-01-01 ENDDATE:
ENVELOPE(9.0,30.0,81.0,76.0)
long_lat ENVELOPE(9.0,30.0,81.0,76.0)
geographic Svalbard
geographic_facet Svalbard
genre glacier
Svalbard
genre_facet glacier
Svalbard
_version_ 1792545088991133696