Remotely sensed debris thickness mapping of Bara Shigri Glacier, Indian Himalaya
Despite the important role of supraglacial debris in ablation, knowledge of debris thickness on Himalayan glaciers is sparse. A recently developed method based on reanalysis data and thermal band satellite imagery has proved to be potentially suitable for debris thickness estimation without the need...
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ftunivnorthumb:oai:nrl.northumbria.ac.uk:23728 2023-05-15T16:57:38+02:00 Remotely sensed debris thickness mapping of Bara Shigri Glacier, Indian Himalaya Schauwecker, Simone Rohrer, Mario Huggel, Christian Kulkarni, Anil Ramanathan, Al Salzmann, Nadine Stoffel, Markus Brock, Benjamin 2015-07-23 text https://nrl.northumbria.ac.uk/id/eprint/23728/ https://doi.org/10.3189/2015JoG14J102 https://nrl.northumbria.ac.uk/id/eprint/23728/1/s6.pdf en eng International Glaciological Society https://nrl.northumbria.ac.uk/id/eprint/23728/1/s6.pdf Schauwecker, Simone, Rohrer, Mario, Huggel, Christian, Kulkarni, Anil, Ramanathan, Al, Salzmann, Nadine, Stoffel, Markus and Brock, Benjamin (2015) Remotely sensed debris thickness mapping of Bara Shigri Glacier, Indian Himalaya. Journal of Glaciology, 61 (228). pp. 675-688. ISSN 0022-1430 F800 Physical and Terrestrial Geographical and Environmental Sciences Article PeerReviewed 2015 ftunivnorthumb https://doi.org/10.3189/2015JoG14J102 2022-09-25T06:02:25Z Despite the important role of supraglacial debris in ablation, knowledge of debris thickness on Himalayan glaciers is sparse. A recently developed method based on reanalysis data and thermal band satellite imagery has proved to be potentially suitable for debris thickness estimation without the need for detailed field data. In this study, we further develop the method and discuss possibilities and limitations arising from its application to a glacier in the Himalaya with scarce in situ data. Surface temperature patterns are consistent for 13 scenes of Advanced Spaceborne Thermal Emission and Reflection Radiometer (ASTER) and Landsat 7 imagery and correlate well with incoming shortwave radiation and air temperature. We use an energy-balance approach to subtract these radiation or air temperature effects, in order to estimate debris thickness patterns as a function of surface temperature. Both incoming shortwave and longwave radiation are estimated with reasonable accuracy when applying parameterizations and reanalysis data. However, the model likely underestimates debris thickness, probably due to incorrect representation of vertical debris temperature profiles, the rate of heat storage and turbulent sensible heat flux. Moreover, the uncertainty of the result was found to increase significantly with thicker debris, a promising result since ablation is enhanced by thin debris of 1–2 cm. Article in Journal/Newspaper Journal of Glaciology Northumbria University, Newcastle: Northumbria Research Link (NRL) Indian Journal of Glaciology 61 228 675 688 |
institution |
Open Polar |
collection |
Northumbria University, Newcastle: Northumbria Research Link (NRL) |
op_collection_id |
ftunivnorthumb |
language |
English |
topic |
F800 Physical and Terrestrial Geographical and Environmental Sciences |
spellingShingle |
F800 Physical and Terrestrial Geographical and Environmental Sciences Schauwecker, Simone Rohrer, Mario Huggel, Christian Kulkarni, Anil Ramanathan, Al Salzmann, Nadine Stoffel, Markus Brock, Benjamin Remotely sensed debris thickness mapping of Bara Shigri Glacier, Indian Himalaya |
topic_facet |
F800 Physical and Terrestrial Geographical and Environmental Sciences |
description |
Despite the important role of supraglacial debris in ablation, knowledge of debris thickness on Himalayan glaciers is sparse. A recently developed method based on reanalysis data and thermal band satellite imagery has proved to be potentially suitable for debris thickness estimation without the need for detailed field data. In this study, we further develop the method and discuss possibilities and limitations arising from its application to a glacier in the Himalaya with scarce in situ data. Surface temperature patterns are consistent for 13 scenes of Advanced Spaceborne Thermal Emission and Reflection Radiometer (ASTER) and Landsat 7 imagery and correlate well with incoming shortwave radiation and air temperature. We use an energy-balance approach to subtract these radiation or air temperature effects, in order to estimate debris thickness patterns as a function of surface temperature. Both incoming shortwave and longwave radiation are estimated with reasonable accuracy when applying parameterizations and reanalysis data. However, the model likely underestimates debris thickness, probably due to incorrect representation of vertical debris temperature profiles, the rate of heat storage and turbulent sensible heat flux. Moreover, the uncertainty of the result was found to increase significantly with thicker debris, a promising result since ablation is enhanced by thin debris of 1–2 cm. |
format |
Article in Journal/Newspaper |
author |
Schauwecker, Simone Rohrer, Mario Huggel, Christian Kulkarni, Anil Ramanathan, Al Salzmann, Nadine Stoffel, Markus Brock, Benjamin |
author_facet |
Schauwecker, Simone Rohrer, Mario Huggel, Christian Kulkarni, Anil Ramanathan, Al Salzmann, Nadine Stoffel, Markus Brock, Benjamin |
author_sort |
Schauwecker, Simone |
title |
Remotely sensed debris thickness mapping of Bara Shigri Glacier, Indian Himalaya |
title_short |
Remotely sensed debris thickness mapping of Bara Shigri Glacier, Indian Himalaya |
title_full |
Remotely sensed debris thickness mapping of Bara Shigri Glacier, Indian Himalaya |
title_fullStr |
Remotely sensed debris thickness mapping of Bara Shigri Glacier, Indian Himalaya |
title_full_unstemmed |
Remotely sensed debris thickness mapping of Bara Shigri Glacier, Indian Himalaya |
title_sort |
remotely sensed debris thickness mapping of bara shigri glacier, indian himalaya |
publisher |
International Glaciological Society |
publishDate |
2015 |
url |
https://nrl.northumbria.ac.uk/id/eprint/23728/ https://doi.org/10.3189/2015JoG14J102 https://nrl.northumbria.ac.uk/id/eprint/23728/1/s6.pdf |
geographic |
Indian |
geographic_facet |
Indian |
genre |
Journal of Glaciology |
genre_facet |
Journal of Glaciology |
op_relation |
https://nrl.northumbria.ac.uk/id/eprint/23728/1/s6.pdf Schauwecker, Simone, Rohrer, Mario, Huggel, Christian, Kulkarni, Anil, Ramanathan, Al, Salzmann, Nadine, Stoffel, Markus and Brock, Benjamin (2015) Remotely sensed debris thickness mapping of Bara Shigri Glacier, Indian Himalaya. Journal of Glaciology, 61 (228). pp. 675-688. ISSN 0022-1430 |
op_doi |
https://doi.org/10.3189/2015JoG14J102 |
container_title |
Journal of Glaciology |
container_volume |
61 |
container_issue |
228 |
container_start_page |
675 |
op_container_end_page |
688 |
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1766049193625911296 |