Cold Surface Layer Dynamics of Storglaciären, Northern Sweden 2009-2019
Storglaciären is a sub-Arctic polythermal glacier in northern Sweden. Twenty years' monitoring of thecold surface layer found that it has lost one third of its total volume of cold ice with an average thinningrate of 0.80 ± 0.24 m·a-1 for the period of 1989-2009. This thesis presents the contin...
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Uppsala universitet, Institutionen för geovetenskaper
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ftuppsalauniv:oai:DiVA.org:uu-385773 2023-05-15T15:18:23+02:00 Cold Surface Layer Dynamics of Storglaciären, Northern Sweden 2009-2019 Dynamik av det kalla ytskiktet på Storglaciären, norra Sverige 2009 – 2019 Feng, Shunan 2019 application/pdf http://urn.kb.se/resolve?urn=urn:nbn:se:uu:diva-385773 eng eng Uppsala universitet, Institutionen för geovetenskaper Examensarbete vid Institutionen för geovetenskaper, 1650-6553 458 http://urn.kb.se/resolve?urn=urn:nbn:se:uu:diva-385773 info:eu-repo/semantics/openAccess Storglaciären cold surface layer cold-temperate transition surface polythermal glacier kallt ytskikt kall-tempererad is polyterrmal glaciär Physical Geography Naturgeografi Student thesis info:eu-repo/semantics/bachelorThesis text 2019 ftuppsalauniv 2023-02-23T21:49:59Z Storglaciären is a sub-Arctic polythermal glacier in northern Sweden. Twenty years' monitoring of thecold surface layer found that it has lost one third of its total volume of cold ice with an average thinningrate of 0.80 ± 0.24 m·a-1 for the period of 1989-2009. This thesis presents the continuous investigationof the thermal structure evolution of Storglaciären using thermistor string measurements and a coupledenergy balance-snowpack model. The thickness dynamics of the cold surface layer is derived from boththe thermistor string measurement (2018-2019) and the simulation results (2009-2018). The subsurface temperature evolution and the associated cold-temperate transition surface (CTS)dynamics are analyzed at both the thermistor scale and glacier scale. Point study involves installing athermistor string and extrapolating the measured subsurface temperature to the pressure melting pointisotherm depth. The simulated CTS depth changes at the study site was also used for comparison. Glacierscale study aims to simulate the spatial and temporal variations of the thickness of the cold surface layer.Meteorological data was collected from multiple automatic weather stations and the solid precipitationwas estimated from the winter mass balance survey. The model was utilized in the study of the coldsurface layer dynamics for the first time. Both the point scale and glacier scale study suggest an overall thickening trend of the cold surfacelayer. The thermistor derived CTS depth exhibits a thickening rate of ~0.9 m·a-1 compared to the depthderived from ground penetrating radar survey in 2009. The influence of mass balance, melt andaccumulation are also examined by spatial correlation with CTS depth. Storglaciären är en subarktisk polytermal glaciär i norra Sverige som har ett kallt ytskikt iablationsområdet. Tidigare studier av mäktigheten hos det kalla ytskiktet visar att Storglaciären harförlorat en tredjedel av sin totala volym av kall is med en genomsnittlig uttunningshastighet på 0,80 ±0,24 m · a-1 för perioden ... Bachelor Thesis Arctic Norra Sverige Northern Sweden subarktisk Uppsala University: Publications (DiVA) Arctic Kalla ENVELOPE(19.617,19.617,67.050,67.050) Storglaciären ENVELOPE(18.560,18.560,67.904,67.904) |
institution |
Open Polar |
collection |
Uppsala University: Publications (DiVA) |
op_collection_id |
ftuppsalauniv |
language |
English |
topic |
Storglaciären cold surface layer cold-temperate transition surface polythermal glacier kallt ytskikt kall-tempererad is polyterrmal glaciär Physical Geography Naturgeografi |
spellingShingle |
Storglaciären cold surface layer cold-temperate transition surface polythermal glacier kallt ytskikt kall-tempererad is polyterrmal glaciär Physical Geography Naturgeografi Feng, Shunan Cold Surface Layer Dynamics of Storglaciären, Northern Sweden 2009-2019 |
topic_facet |
Storglaciären cold surface layer cold-temperate transition surface polythermal glacier kallt ytskikt kall-tempererad is polyterrmal glaciär Physical Geography Naturgeografi |
description |
Storglaciären is a sub-Arctic polythermal glacier in northern Sweden. Twenty years' monitoring of thecold surface layer found that it has lost one third of its total volume of cold ice with an average thinningrate of 0.80 ± 0.24 m·a-1 for the period of 1989-2009. This thesis presents the continuous investigationof the thermal structure evolution of Storglaciären using thermistor string measurements and a coupledenergy balance-snowpack model. The thickness dynamics of the cold surface layer is derived from boththe thermistor string measurement (2018-2019) and the simulation results (2009-2018). The subsurface temperature evolution and the associated cold-temperate transition surface (CTS)dynamics are analyzed at both the thermistor scale and glacier scale. Point study involves installing athermistor string and extrapolating the measured subsurface temperature to the pressure melting pointisotherm depth. The simulated CTS depth changes at the study site was also used for comparison. Glacierscale study aims to simulate the spatial and temporal variations of the thickness of the cold surface layer.Meteorological data was collected from multiple automatic weather stations and the solid precipitationwas estimated from the winter mass balance survey. The model was utilized in the study of the coldsurface layer dynamics for the first time. Both the point scale and glacier scale study suggest an overall thickening trend of the cold surfacelayer. The thermistor derived CTS depth exhibits a thickening rate of ~0.9 m·a-1 compared to the depthderived from ground penetrating radar survey in 2009. The influence of mass balance, melt andaccumulation are also examined by spatial correlation with CTS depth. Storglaciären är en subarktisk polytermal glaciär i norra Sverige som har ett kallt ytskikt iablationsområdet. Tidigare studier av mäktigheten hos det kalla ytskiktet visar att Storglaciären harförlorat en tredjedel av sin totala volym av kall is med en genomsnittlig uttunningshastighet på 0,80 ±0,24 m · a-1 för perioden ... |
format |
Bachelor Thesis |
author |
Feng, Shunan |
author_facet |
Feng, Shunan |
author_sort |
Feng, Shunan |
title |
Cold Surface Layer Dynamics of Storglaciären, Northern Sweden 2009-2019 |
title_short |
Cold Surface Layer Dynamics of Storglaciären, Northern Sweden 2009-2019 |
title_full |
Cold Surface Layer Dynamics of Storglaciären, Northern Sweden 2009-2019 |
title_fullStr |
Cold Surface Layer Dynamics of Storglaciären, Northern Sweden 2009-2019 |
title_full_unstemmed |
Cold Surface Layer Dynamics of Storglaciären, Northern Sweden 2009-2019 |
title_sort |
cold surface layer dynamics of storglaciären, northern sweden 2009-2019 |
publisher |
Uppsala universitet, Institutionen för geovetenskaper |
publishDate |
2019 |
url |
http://urn.kb.se/resolve?urn=urn:nbn:se:uu:diva-385773 |
long_lat |
ENVELOPE(19.617,19.617,67.050,67.050) ENVELOPE(18.560,18.560,67.904,67.904) |
geographic |
Arctic Kalla Storglaciären |
geographic_facet |
Arctic Kalla Storglaciären |
genre |
Arctic Norra Sverige Northern Sweden subarktisk |
genre_facet |
Arctic Norra Sverige Northern Sweden subarktisk |
op_relation |
Examensarbete vid Institutionen för geovetenskaper, 1650-6553 458 http://urn.kb.se/resolve?urn=urn:nbn:se:uu:diva-385773 |
op_rights |
info:eu-repo/semantics/openAccess |
_version_ |
1766348588406800384 |