Paleoglaciological study of the Ahlmannryggen, Borgmassivet and Kirwanveggen nunatak ranges, Dronning Maud Land, East Antarctica, using WorldView imagery
Paleoglaciological reconstructions based on glacial geological and geomorphological evidence areused to constrain and test numerical models of ice sheet extent and dynamics. The MAGIC-DMLresearch project (“Mapping, Measuring and Modelling Antarctic Geomorphology and Ice Change, inDronning Maud Land”...
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Stockholms universitet, Institutionen för naturgeografi
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ftsprs:oai:DiVA.org:polar-8648 2023-05-15T14:00:46+02:00 Paleoglaciological study of the Ahlmannryggen, Borgmassivet and Kirwanveggen nunatak ranges, Dronning Maud Land, East Antarctica, using WorldView imagery Serra, Elena 2017 application/pdf http://urn.kb.se/resolve?urn=urn:nbn:se:polar:diva-8648 eng eng Stockholms universitet, Institutionen för naturgeografi http://urn.kb.se/resolve?urn=urn:nbn:se:polar:diva-8648 info:eu-repo/semantics/openAccess Physical Geography Naturgeografi Student thesis info:eu-repo/semantics/bachelorThesis text 2017 ftsprs 2022-07-10T16:16:53Z Paleoglaciological reconstructions based on glacial geological and geomorphological evidence areused to constrain and test numerical models of ice sheet extent and dynamics. The MAGIC-DMLresearch project (“Mapping, Measuring and Modelling Antarctic Geomorphology and Ice Change, inDronning Maud Land”) is trying to reconstruct the timing and pattern of ice surface elevation changessince the mid-Pliocene across western Dronning Maud Land, East Antarctica. This reconstructionwill work as the basis for testing and constraining ice sheet numerical models to improve climateunderstanding in Antarctica. This master thesis project contributes to MAGIC-DML by adopting a high-resolution remote sensingbasedmapping of glacial geomorphology and ice sheet surface structures, for a coast-inland transectincluding the Ahlmannryggen, Borgmassivet, and Kirwanveggen nunatak ranges. The primary aimof this study is to investigate the glaciology and paleoglaciology of the study area, in order to mapevidence for a former thicker ice sheet on nunatak slopes and plateaus, and patterns of ice flow of thecurrent ice sheet surface. Meso-scale glacial landforms and ice flow features were identified andmapped using different remote sensing data sets: the LANDSAT Image Mosaic of Antarctica(LIMA), DigitalGlobe Worldview-2 (WV02) and Worldview-3 (WV03) panchromatic andmultispectral images, the Radarsat Antarctica Mapping Project (RAMP) Ice Surface Digital ElevationModel (DEM) version 2, and the Bedmap2 datasets. The satellite imagery was analysed in a multistepprocedure using ArcGIS, including image processing and mosaicking, visual feature recognition,and mapping. The identification of some key landforms required the adoption of assumptions, forexample in order to distinguish till cover from regolith or boulders derived from rock fall from glacialerratics. Present-day ice flow directions were traced according to the distribution of ice surfacefeatures such as blue ice areas, crevasse fields, longitudinal surface structures, and ... Bachelor Thesis Antarc* Antarctic Antarctica DML Dronning Maud Land East Antarctica Ice Sheet Swedish Polar Research Secretariat: Swedish Polar Bibliography (DiVA) Ahlmannryggen ENVELOPE(-2.500,-2.500,-71.833,-71.833) Antarctic Borgmassivet ENVELOPE(-3.500,-3.500,-72.667,-72.667) Dronning Maud Land East Antarctica Kirwanveggen ENVELOPE(-3.500,-3.500,-73.500,-73.500) |
institution |
Open Polar |
collection |
Swedish Polar Research Secretariat: Swedish Polar Bibliography (DiVA) |
op_collection_id |
ftsprs |
language |
English |
topic |
Physical Geography Naturgeografi |
spellingShingle |
Physical Geography Naturgeografi Serra, Elena Paleoglaciological study of the Ahlmannryggen, Borgmassivet and Kirwanveggen nunatak ranges, Dronning Maud Land, East Antarctica, using WorldView imagery |
topic_facet |
Physical Geography Naturgeografi |
description |
Paleoglaciological reconstructions based on glacial geological and geomorphological evidence areused to constrain and test numerical models of ice sheet extent and dynamics. The MAGIC-DMLresearch project (“Mapping, Measuring and Modelling Antarctic Geomorphology and Ice Change, inDronning Maud Land”) is trying to reconstruct the timing and pattern of ice surface elevation changessince the mid-Pliocene across western Dronning Maud Land, East Antarctica. This reconstructionwill work as the basis for testing and constraining ice sheet numerical models to improve climateunderstanding in Antarctica. This master thesis project contributes to MAGIC-DML by adopting a high-resolution remote sensingbasedmapping of glacial geomorphology and ice sheet surface structures, for a coast-inland transectincluding the Ahlmannryggen, Borgmassivet, and Kirwanveggen nunatak ranges. The primary aimof this study is to investigate the glaciology and paleoglaciology of the study area, in order to mapevidence for a former thicker ice sheet on nunatak slopes and plateaus, and patterns of ice flow of thecurrent ice sheet surface. Meso-scale glacial landforms and ice flow features were identified andmapped using different remote sensing data sets: the LANDSAT Image Mosaic of Antarctica(LIMA), DigitalGlobe Worldview-2 (WV02) and Worldview-3 (WV03) panchromatic andmultispectral images, the Radarsat Antarctica Mapping Project (RAMP) Ice Surface Digital ElevationModel (DEM) version 2, and the Bedmap2 datasets. The satellite imagery was analysed in a multistepprocedure using ArcGIS, including image processing and mosaicking, visual feature recognition,and mapping. The identification of some key landforms required the adoption of assumptions, forexample in order to distinguish till cover from regolith or boulders derived from rock fall from glacialerratics. Present-day ice flow directions were traced according to the distribution of ice surfacefeatures such as blue ice areas, crevasse fields, longitudinal surface structures, and ... |
format |
Bachelor Thesis |
author |
Serra, Elena |
author_facet |
Serra, Elena |
author_sort |
Serra, Elena |
title |
Paleoglaciological study of the Ahlmannryggen, Borgmassivet and Kirwanveggen nunatak ranges, Dronning Maud Land, East Antarctica, using WorldView imagery |
title_short |
Paleoglaciological study of the Ahlmannryggen, Borgmassivet and Kirwanveggen nunatak ranges, Dronning Maud Land, East Antarctica, using WorldView imagery |
title_full |
Paleoglaciological study of the Ahlmannryggen, Borgmassivet and Kirwanveggen nunatak ranges, Dronning Maud Land, East Antarctica, using WorldView imagery |
title_fullStr |
Paleoglaciological study of the Ahlmannryggen, Borgmassivet and Kirwanveggen nunatak ranges, Dronning Maud Land, East Antarctica, using WorldView imagery |
title_full_unstemmed |
Paleoglaciological study of the Ahlmannryggen, Borgmassivet and Kirwanveggen nunatak ranges, Dronning Maud Land, East Antarctica, using WorldView imagery |
title_sort |
paleoglaciological study of the ahlmannryggen, borgmassivet and kirwanveggen nunatak ranges, dronning maud land, east antarctica, using worldview imagery |
publisher |
Stockholms universitet, Institutionen för naturgeografi |
publishDate |
2017 |
url |
http://urn.kb.se/resolve?urn=urn:nbn:se:polar:diva-8648 |
long_lat |
ENVELOPE(-2.500,-2.500,-71.833,-71.833) ENVELOPE(-3.500,-3.500,-72.667,-72.667) ENVELOPE(-3.500,-3.500,-73.500,-73.500) |
geographic |
Ahlmannryggen Antarctic Borgmassivet Dronning Maud Land East Antarctica Kirwanveggen |
geographic_facet |
Ahlmannryggen Antarctic Borgmassivet Dronning Maud Land East Antarctica Kirwanveggen |
genre |
Antarc* Antarctic Antarctica DML Dronning Maud Land East Antarctica Ice Sheet |
genre_facet |
Antarc* Antarctic Antarctica DML Dronning Maud Land East Antarctica Ice Sheet |
op_relation |
http://urn.kb.se/resolve?urn=urn:nbn:se:polar:diva-8648 |
op_rights |
info:eu-repo/semantics/openAccess |
_version_ |
1766270108857008128 |