Measuring glacier surface roughness using plot-scale, close-range digital photogrammetry
Glacier roughness at sub-metre scales is an important control on the ice surface energy balance and has implications for scattering energy measured by remote-sensing instruments. Ice surface roughness is dynamic as a consequence of spatial and temporal variation in ablation. To date, studies relying...
Published in: | Journal of Glaciology |
---|---|
Main Authors: | , , , , |
Format: | Article in Journal/Newspaper |
Language: | unknown |
Published: |
International Glaciological Society
2014
|
Subjects: | |
Online Access: | https://nrl.northumbria.ac.uk/id/eprint/17686/ https://doi.org/10.3189/2014JoG14J032 |
id |
ftunivnorthumb:oai:nrl.northumbria.ac.uk:17686 |
---|---|
record_format |
openpolar |
spelling |
ftunivnorthumb:oai:nrl.northumbria.ac.uk:17686 2023-05-15T16:22:13+02:00 Measuring glacier surface roughness using plot-scale, close-range digital photogrammetry Irvine-Fynn, Tristram Sanz-Ablanedo, Enoc Rutter, Nick Smith, Mark Chandler, Jim 2014 https://nrl.northumbria.ac.uk/id/eprint/17686/ https://doi.org/10.3189/2014JoG14J032 unknown International Glaciological Society Irvine-Fynn, Tristram, Sanz-Ablanedo, Enoc, Rutter, Nick, Smith, Mark and Chandler, Jim (2014) Measuring glacier surface roughness using plot-scale, close-range digital photogrammetry. Journal of Glaciology, 60 (223). pp. 957-969. ISSN 0022-1430 F800 Physical and Terrestrial Geographical and Environmental Sciences Article PeerReviewed 2014 ftunivnorthumb https://doi.org/10.3189/2014JoG14J032 2022-09-25T06:00:02Z Glacier roughness at sub-metre scales is an important control on the ice surface energy balance and has implications for scattering energy measured by remote-sensing instruments. Ice surface roughness is dynamic as a consequence of spatial and temporal variation in ablation. To date, studies relying on singular and/or spatially discrete two-dimensional profiles to describe ice surface roughness have failed to resolve common patterns or causes of variation in glacier surface morphology. Here we demonstrate the potential of close-range digital photogrammetry as a rapid and cost-effective method to retrieve three-dimensional data detailing plot-scale supraglacial topography. The photogrammetric approach here employed a calibrated, consumer-grade 5 Mpix digital camera repeatedly imaging a plotscale (≤25m2) ice surface area on Midtre Lovénbreen, Svalbard. From stereo-pair images, digital surface models (DSMs) with sub-centimetre horizontal resolution and 3mm vertical precision were achieved at plot scales ≤4m2. Extraction of roughness metrics including estimates of aerodynamic roughness length (z0) was readily achievable, and temporal variations in the glacier surface topography were captured. Close-range photogrammetry, with appropriate camera calibration and image acquisition geometry, is shown to be a robust method to record sub-centimetre variations in ablating ice topography. While the DSM plot area may be limited through use of stereo-pair images and issues of obliquity, emerging photogrammetric packages are likely to overcome such limitations. Article in Journal/Newspaper glacier Journal of Glaciology Svalbard Northumbria University, Newcastle: Northumbria Research Link (NRL) Svalbard Journal of Glaciology 60 223 957 969 |
institution |
Open Polar |
collection |
Northumbria University, Newcastle: Northumbria Research Link (NRL) |
op_collection_id |
ftunivnorthumb |
language |
unknown |
topic |
F800 Physical and Terrestrial Geographical and Environmental Sciences |
spellingShingle |
F800 Physical and Terrestrial Geographical and Environmental Sciences Irvine-Fynn, Tristram Sanz-Ablanedo, Enoc Rutter, Nick Smith, Mark Chandler, Jim Measuring glacier surface roughness using plot-scale, close-range digital photogrammetry |
topic_facet |
F800 Physical and Terrestrial Geographical and Environmental Sciences |
description |
Glacier roughness at sub-metre scales is an important control on the ice surface energy balance and has implications for scattering energy measured by remote-sensing instruments. Ice surface roughness is dynamic as a consequence of spatial and temporal variation in ablation. To date, studies relying on singular and/or spatially discrete two-dimensional profiles to describe ice surface roughness have failed to resolve common patterns or causes of variation in glacier surface morphology. Here we demonstrate the potential of close-range digital photogrammetry as a rapid and cost-effective method to retrieve three-dimensional data detailing plot-scale supraglacial topography. The photogrammetric approach here employed a calibrated, consumer-grade 5 Mpix digital camera repeatedly imaging a plotscale (≤25m2) ice surface area on Midtre Lovénbreen, Svalbard. From stereo-pair images, digital surface models (DSMs) with sub-centimetre horizontal resolution and 3mm vertical precision were achieved at plot scales ≤4m2. Extraction of roughness metrics including estimates of aerodynamic roughness length (z0) was readily achievable, and temporal variations in the glacier surface topography were captured. Close-range photogrammetry, with appropriate camera calibration and image acquisition geometry, is shown to be a robust method to record sub-centimetre variations in ablating ice topography. While the DSM plot area may be limited through use of stereo-pair images and issues of obliquity, emerging photogrammetric packages are likely to overcome such limitations. |
format |
Article in Journal/Newspaper |
author |
Irvine-Fynn, Tristram Sanz-Ablanedo, Enoc Rutter, Nick Smith, Mark Chandler, Jim |
author_facet |
Irvine-Fynn, Tristram Sanz-Ablanedo, Enoc Rutter, Nick Smith, Mark Chandler, Jim |
author_sort |
Irvine-Fynn, Tristram |
title |
Measuring glacier surface roughness using plot-scale, close-range digital photogrammetry |
title_short |
Measuring glacier surface roughness using plot-scale, close-range digital photogrammetry |
title_full |
Measuring glacier surface roughness using plot-scale, close-range digital photogrammetry |
title_fullStr |
Measuring glacier surface roughness using plot-scale, close-range digital photogrammetry |
title_full_unstemmed |
Measuring glacier surface roughness using plot-scale, close-range digital photogrammetry |
title_sort |
measuring glacier surface roughness using plot-scale, close-range digital photogrammetry |
publisher |
International Glaciological Society |
publishDate |
2014 |
url |
https://nrl.northumbria.ac.uk/id/eprint/17686/ https://doi.org/10.3189/2014JoG14J032 |
geographic |
Svalbard |
geographic_facet |
Svalbard |
genre |
glacier Journal of Glaciology Svalbard |
genre_facet |
glacier Journal of Glaciology Svalbard |
op_relation |
Irvine-Fynn, Tristram, Sanz-Ablanedo, Enoc, Rutter, Nick, Smith, Mark and Chandler, Jim (2014) Measuring glacier surface roughness using plot-scale, close-range digital photogrammetry. Journal of Glaciology, 60 (223). pp. 957-969. ISSN 0022-1430 |
op_doi |
https://doi.org/10.3189/2014JoG14J032 |
container_title |
Journal of Glaciology |
container_volume |
60 |
container_issue |
223 |
container_start_page |
957 |
op_container_end_page |
969 |
_version_ |
1766010190013923328 |