Multi-method based characterization of calving events at Sálajiegna Glacier - Lake Sulitelma, Northern Sweden
Sea level rise concerns millions of people in coastal areas across the globe. One of the largest uncertainties to project future sea level rise is the frontal ablation (accounting for calving and submarine melt) at marine ice margins, around the Greenland and Antarctic Ice Sheet. High rates of front...
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Stockholms universitet, Institutionen för naturgeografi
2021
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ftstockholmuniv:oai:DiVA.org:su-204975 2023-05-15T13:56:08+02:00 Multi-method based characterization of calving events at Sálajiegna Glacier - Lake Sulitelma, Northern Sweden Schulthess, Martin 2021 application/pdf http://urn.kb.se/resolve?urn=urn:nbn:se:su:diva-204975 eng eng Stockholms universitet, Institutionen för naturgeografi http://urn.kb.se/resolve?urn=urn:nbn:se:su:diva-204975 info:eu-repo/semantics/openAccess Glaciology Glacier Glaciers Calving calving front detection algorithm Acoustic Acoustics Photogrammetry ice-ocean interactions UAV drone time-lapse Salajiegna Physical Geography Naturgeografi Student thesis info:eu-repo/semantics/bachelorThesis text 2021 ftstockholmuniv 2023-02-23T21:43:55Z Sea level rise concerns millions of people in coastal areas across the globe. One of the largest uncertainties to project future sea level rise is the frontal ablation (accounting for calving and submarine melt) at marine ice margins, around the Greenland and Antarctic Ice Sheet. High rates of frontal ablation have been observed to imply, through loss of the buttressing effect but not limited to it, increased mass loss from marine terminating glaciers and hence, associated sea level rise. This study focuses on calving processes at a freshwater lake in northern Sweden, which represents a simpler environment to study calving processes than the marine one, because impacts of tides, salinity, and circulation (all known to be relevant at marine ice-ocean boundaries) can be neglected. A multi-method approach to quantify and characterize calving events is presented here, exploring and analysing the underwater acoustic soundscape at a calving glacier front, in connection with optical, image-based methods such as time- lapse photography, and photogrammetry based on footage acquired by an uncrewed aerial vehicle (UAV). An acoustic detector is developed, tested and applied to data set acquired during 2020, and results indicate that the acoustic detector can be an important complement in the range of tools used to observe, and quantify, calving. Applied in remote locations, where continuous monitoring is difficult and where optical methods are of limited use, collecting acoustic data and monitoring calving by means of its acoustic signature could render insights previously not available (because of lacking data and methodology). Bachelor Thesis Antarc* Antarctic glacier Greenland Ice Sheet Northern Sweden Stockholm University: Publications (DiVA) Antarctic Greenland Sulitelma ENVELOPE(16.395,16.395,67.139,67.139) |
institution |
Open Polar |
collection |
Stockholm University: Publications (DiVA) |
op_collection_id |
ftstockholmuniv |
language |
English |
topic |
Glaciology Glacier Glaciers Calving calving front detection algorithm Acoustic Acoustics Photogrammetry ice-ocean interactions UAV drone time-lapse Salajiegna Physical Geography Naturgeografi |
spellingShingle |
Glaciology Glacier Glaciers Calving calving front detection algorithm Acoustic Acoustics Photogrammetry ice-ocean interactions UAV drone time-lapse Salajiegna Physical Geography Naturgeografi Schulthess, Martin Multi-method based characterization of calving events at Sálajiegna Glacier - Lake Sulitelma, Northern Sweden |
topic_facet |
Glaciology Glacier Glaciers Calving calving front detection algorithm Acoustic Acoustics Photogrammetry ice-ocean interactions UAV drone time-lapse Salajiegna Physical Geography Naturgeografi |
description |
Sea level rise concerns millions of people in coastal areas across the globe. One of the largest uncertainties to project future sea level rise is the frontal ablation (accounting for calving and submarine melt) at marine ice margins, around the Greenland and Antarctic Ice Sheet. High rates of frontal ablation have been observed to imply, through loss of the buttressing effect but not limited to it, increased mass loss from marine terminating glaciers and hence, associated sea level rise. This study focuses on calving processes at a freshwater lake in northern Sweden, which represents a simpler environment to study calving processes than the marine one, because impacts of tides, salinity, and circulation (all known to be relevant at marine ice-ocean boundaries) can be neglected. A multi-method approach to quantify and characterize calving events is presented here, exploring and analysing the underwater acoustic soundscape at a calving glacier front, in connection with optical, image-based methods such as time- lapse photography, and photogrammetry based on footage acquired by an uncrewed aerial vehicle (UAV). An acoustic detector is developed, tested and applied to data set acquired during 2020, and results indicate that the acoustic detector can be an important complement in the range of tools used to observe, and quantify, calving. Applied in remote locations, where continuous monitoring is difficult and where optical methods are of limited use, collecting acoustic data and monitoring calving by means of its acoustic signature could render insights previously not available (because of lacking data and methodology). |
format |
Bachelor Thesis |
author |
Schulthess, Martin |
author_facet |
Schulthess, Martin |
author_sort |
Schulthess, Martin |
title |
Multi-method based characterization of calving events at Sálajiegna Glacier - Lake Sulitelma, Northern Sweden |
title_short |
Multi-method based characterization of calving events at Sálajiegna Glacier - Lake Sulitelma, Northern Sweden |
title_full |
Multi-method based characterization of calving events at Sálajiegna Glacier - Lake Sulitelma, Northern Sweden |
title_fullStr |
Multi-method based characterization of calving events at Sálajiegna Glacier - Lake Sulitelma, Northern Sweden |
title_full_unstemmed |
Multi-method based characterization of calving events at Sálajiegna Glacier - Lake Sulitelma, Northern Sweden |
title_sort |
multi-method based characterization of calving events at sálajiegna glacier - lake sulitelma, northern sweden |
publisher |
Stockholms universitet, Institutionen för naturgeografi |
publishDate |
2021 |
url |
http://urn.kb.se/resolve?urn=urn:nbn:se:su:diva-204975 |
long_lat |
ENVELOPE(16.395,16.395,67.139,67.139) |
geographic |
Antarctic Greenland Sulitelma |
geographic_facet |
Antarctic Greenland Sulitelma |
genre |
Antarc* Antarctic glacier Greenland Ice Sheet Northern Sweden |
genre_facet |
Antarc* Antarctic glacier Greenland Ice Sheet Northern Sweden |
op_relation |
http://urn.kb.se/resolve?urn=urn:nbn:se:su:diva-204975 |
op_rights |
info:eu-repo/semantics/openAccess |
_version_ |
1766263419122483200 |