High resolution mapping of supra‐glacial drainage pathways reveals link between micro‐channel drainage density, surface roughness and surface reflectance
Abstract This paper reports on the use of a small unmanned aerial vehicle (sUAV) carrying a standard compact camera, to construct a high resolution orthomosaic (OM) and digital elevation model (DEM) over the lower reaches of the glacier Midtre Lovénbreen, Svalbard. Structure from Motion (SfM) techni...
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crwiley:10.1002/esp.3719 2024-09-15T18:07:58+00:00 High resolution mapping of supra‐glacial drainage pathways reveals link between micro‐channel drainage density, surface roughness and surface reflectance Rippin, David M. Pomfret, Andrew King, Nigel University of York 2015 http://dx.doi.org/10.1002/esp.3719 https://api.wiley.com/onlinelibrary/tdm/v1/articles/10.1002%2Fesp.3719 https://onlinelibrary.wiley.com/doi/pdf/10.1002/esp.3719 en eng Wiley http://onlinelibrary.wiley.com/termsAndConditions#vor Earth Surface Processes and Landforms volume 40, issue 10, page 1279-1290 ISSN 0197-9337 1096-9837 journal-article 2015 crwiley https://doi.org/10.1002/esp.3719 2024-07-25T04:21:48Z Abstract This paper reports on the use of a small unmanned aerial vehicle (sUAV) carrying a standard compact camera, to construct a high resolution orthomosaic (OM) and digital elevation model (DEM) over the lower reaches of the glacier Midtre Lovénbreen, Svalbard. Structure from Motion (SfM) techniques were used to build the OM and DEM, and together these reveal insights into the nature of supra‐glacial drainage. Major meandering supra‐glacial drainage pathways show clear dynamism, via meander cutoffs and abandoned channels. In addition, the imagery reveals a very extensive network of smaller channels that may well carry substantial amounts of water. This network of channels is in part controlled by the structure of the glacier, but in turn, these channels have a significant impact on the ice surface. Roughness of the ice surface is higher where channels are most extensive. In addition, we find a relationship between channel density and surface reflectance, such that greater channel density is associated with lower reflectance values. Given the role of surface reflectance and roughness in the energy balance of glaciers, it is therefore apparent that extensive networks of small supra‐glacial channels across such glaciers have the potential to have an important impact on energy exchanges between the atmosphere and the ice surface. Copyright © 2015 John Wiley & Sons, Ltd. Article in Journal/Newspaper glacier Svalbard Wiley Online Library Earth Surface Processes and Landforms 40 10 1279 1290 |
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Wiley Online Library |
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crwiley |
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English |
description |
Abstract This paper reports on the use of a small unmanned aerial vehicle (sUAV) carrying a standard compact camera, to construct a high resolution orthomosaic (OM) and digital elevation model (DEM) over the lower reaches of the glacier Midtre Lovénbreen, Svalbard. Structure from Motion (SfM) techniques were used to build the OM and DEM, and together these reveal insights into the nature of supra‐glacial drainage. Major meandering supra‐glacial drainage pathways show clear dynamism, via meander cutoffs and abandoned channels. In addition, the imagery reveals a very extensive network of smaller channels that may well carry substantial amounts of water. This network of channels is in part controlled by the structure of the glacier, but in turn, these channels have a significant impact on the ice surface. Roughness of the ice surface is higher where channels are most extensive. In addition, we find a relationship between channel density and surface reflectance, such that greater channel density is associated with lower reflectance values. Given the role of surface reflectance and roughness in the energy balance of glaciers, it is therefore apparent that extensive networks of small supra‐glacial channels across such glaciers have the potential to have an important impact on energy exchanges between the atmosphere and the ice surface. Copyright © 2015 John Wiley & Sons, Ltd. |
author2 |
University of York |
format |
Article in Journal/Newspaper |
author |
Rippin, David M. Pomfret, Andrew King, Nigel |
spellingShingle |
Rippin, David M. Pomfret, Andrew King, Nigel High resolution mapping of supra‐glacial drainage pathways reveals link between micro‐channel drainage density, surface roughness and surface reflectance |
author_facet |
Rippin, David M. Pomfret, Andrew King, Nigel |
author_sort |
Rippin, David M. |
title |
High resolution mapping of supra‐glacial drainage pathways reveals link between micro‐channel drainage density, surface roughness and surface reflectance |
title_short |
High resolution mapping of supra‐glacial drainage pathways reveals link between micro‐channel drainage density, surface roughness and surface reflectance |
title_full |
High resolution mapping of supra‐glacial drainage pathways reveals link between micro‐channel drainage density, surface roughness and surface reflectance |
title_fullStr |
High resolution mapping of supra‐glacial drainage pathways reveals link between micro‐channel drainage density, surface roughness and surface reflectance |
title_full_unstemmed |
High resolution mapping of supra‐glacial drainage pathways reveals link between micro‐channel drainage density, surface roughness and surface reflectance |
title_sort |
high resolution mapping of supra‐glacial drainage pathways reveals link between micro‐channel drainage density, surface roughness and surface reflectance |
publisher |
Wiley |
publishDate |
2015 |
url |
http://dx.doi.org/10.1002/esp.3719 https://api.wiley.com/onlinelibrary/tdm/v1/articles/10.1002%2Fesp.3719 https://onlinelibrary.wiley.com/doi/pdf/10.1002/esp.3719 |
genre |
glacier Svalbard |
genre_facet |
glacier Svalbard |
op_source |
Earth Surface Processes and Landforms volume 40, issue 10, page 1279-1290 ISSN 0197-9337 1096-9837 |
op_rights |
http://onlinelibrary.wiley.com/termsAndConditions#vor |
op_doi |
https://doi.org/10.1002/esp.3719 |
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Earth Surface Processes and Landforms |
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40 |
container_issue |
10 |
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1279 |
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1290 |
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1810445322562830336 |