Ice thickness of Kilimanjaro's Northern Ice Field mapped by ground-penetrating radar
Although its Holocene glacier history is still subject to debate, the ongoing iconic decline of Kilimanjaro's largest remaining ice body, the Northern Ice Field (NIF), has been documented extensively based on surface and photogrammetric measurements. The study presented here adds, for the first...
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ftpangaea:oai:pangaea.de:doi:10.1594/PANGAEA.867908 2023-05-15T16:39:15+02:00 Ice thickness of Kilimanjaro's Northern Ice Field mapped by ground-penetrating radar Bohleber, Pascal Sold, Leo Hardy, Douglas R Schwikowski, Margit Klenk, Patrick Fischer, Andrea Sirguey, Pascal Cullen, Nicolas J Potocki, Mariusz Hoffmann, Helene Mayewski, Paul MEDIAN LATITUDE: -3.058324 * MEDIAN LONGITUDE: 37.348131 * SOUTH-BOUND LATITUDE: -3.059926 * WEST-BOUND LONGITUDE: 37.344638 * NORTH-BOUND LATITUDE: -3.055993 * EAST-BOUND LONGITUDE: 37.353663 2016-11-09 application/zip, 12 datasets https://doi.pangaea.de/10.1594/PANGAEA.867908 https://doi.org/10.1594/PANGAEA.867908 en eng PANGAEA https://doi.pangaea.de/10.1594/PANGAEA.867908 https://doi.org/10.1594/PANGAEA.867908 CC-BY-3.0: Creative Commons Attribution 3.0 Unported Access constraints: unrestricted info:eu-repo/semantics/openAccess CC-BY Supplement to: Bohleber, Pascal; Sold, Leo; Hardy, Douglas R; Schwikowski, Margit; Klenk, Patrick; Fischer, Andrea; Sirguey, Pascal; Cullen, Nicolas J; Potocki, Mariusz; Hoffmann, Helene; Mayewski, Paul (2017): Ground-penetrating radar reveals ice thickness and undisturbed englacial layers at Kilimanjaro's Northern Ice Field. The Cryosphere, 11(1), 469-482, https://doi.org/10.5194/tc-11-469-2017 Dataset 2016 ftpangaea https://doi.org/10.1594/PANGAEA.867908 https://doi.org/10.5194/tc-11-469-2017 2023-01-20T07:33:48Z Although its Holocene glacier history is still subject to debate, the ongoing iconic decline of Kilimanjaro's largest remaining ice body, the Northern Ice Field (NIF), has been documented extensively based on surface and photogrammetric measurements. The study presented here adds, for the first time, ground-penetrating radar (GPR) data at center frequencies of 100 and 200 MHz to investigate bedrock topography, ice thickness and internal stratigraphy at NIF. The direct comparison of the GPR signal to the visible glacier stratigraphy at NIF's vertical walls is used to validate ice thickness and reveals that the major internal reflections seen by GPR can be associated with dust layers. Englacial reflections can be traced consistently within our 200 MHz profiles, indicating an undisturbed internal stratigraphy within NIF's central flat area. We show that it is possible to follow isochrone layers between two former NIF ice core drilling sites and a sampling site on NIF's vertical wall. As a result, these isochrone layers provide constraints for future attempts at linking age-depth information obtained from multiple locations at NIF. The GPR profiles reveal an ice thickness ranging between (6.1 ± 0.5) and (53.5 ± 1.0) m. Combining these data with a very high resolution digital elevation model we spatially extrapolate ice thickness and give an estimate of the total ice volume remaining at NIF's southern portion as (12.0 ± 0.3) 10**6 m**3. Dataset ice core The Cryosphere PANGAEA - Data Publisher for Earth & Environmental Science ENVELOPE(37.344638,37.353663,-3.055993,-3.059926) |
institution |
Open Polar |
collection |
PANGAEA - Data Publisher for Earth & Environmental Science |
op_collection_id |
ftpangaea |
language |
English |
description |
Although its Holocene glacier history is still subject to debate, the ongoing iconic decline of Kilimanjaro's largest remaining ice body, the Northern Ice Field (NIF), has been documented extensively based on surface and photogrammetric measurements. The study presented here adds, for the first time, ground-penetrating radar (GPR) data at center frequencies of 100 and 200 MHz to investigate bedrock topography, ice thickness and internal stratigraphy at NIF. The direct comparison of the GPR signal to the visible glacier stratigraphy at NIF's vertical walls is used to validate ice thickness and reveals that the major internal reflections seen by GPR can be associated with dust layers. Englacial reflections can be traced consistently within our 200 MHz profiles, indicating an undisturbed internal stratigraphy within NIF's central flat area. We show that it is possible to follow isochrone layers between two former NIF ice core drilling sites and a sampling site on NIF's vertical wall. As a result, these isochrone layers provide constraints for future attempts at linking age-depth information obtained from multiple locations at NIF. The GPR profiles reveal an ice thickness ranging between (6.1 ± 0.5) and (53.5 ± 1.0) m. Combining these data with a very high resolution digital elevation model we spatially extrapolate ice thickness and give an estimate of the total ice volume remaining at NIF's southern portion as (12.0 ± 0.3) 10**6 m**3. |
format |
Dataset |
author |
Bohleber, Pascal Sold, Leo Hardy, Douglas R Schwikowski, Margit Klenk, Patrick Fischer, Andrea Sirguey, Pascal Cullen, Nicolas J Potocki, Mariusz Hoffmann, Helene Mayewski, Paul |
spellingShingle |
Bohleber, Pascal Sold, Leo Hardy, Douglas R Schwikowski, Margit Klenk, Patrick Fischer, Andrea Sirguey, Pascal Cullen, Nicolas J Potocki, Mariusz Hoffmann, Helene Mayewski, Paul Ice thickness of Kilimanjaro's Northern Ice Field mapped by ground-penetrating radar |
author_facet |
Bohleber, Pascal Sold, Leo Hardy, Douglas R Schwikowski, Margit Klenk, Patrick Fischer, Andrea Sirguey, Pascal Cullen, Nicolas J Potocki, Mariusz Hoffmann, Helene Mayewski, Paul |
author_sort |
Bohleber, Pascal |
title |
Ice thickness of Kilimanjaro's Northern Ice Field mapped by ground-penetrating radar |
title_short |
Ice thickness of Kilimanjaro's Northern Ice Field mapped by ground-penetrating radar |
title_full |
Ice thickness of Kilimanjaro's Northern Ice Field mapped by ground-penetrating radar |
title_fullStr |
Ice thickness of Kilimanjaro's Northern Ice Field mapped by ground-penetrating radar |
title_full_unstemmed |
Ice thickness of Kilimanjaro's Northern Ice Field mapped by ground-penetrating radar |
title_sort |
ice thickness of kilimanjaro's northern ice field mapped by ground-penetrating radar |
publisher |
PANGAEA |
publishDate |
2016 |
url |
https://doi.pangaea.de/10.1594/PANGAEA.867908 https://doi.org/10.1594/PANGAEA.867908 |
op_coverage |
MEDIAN LATITUDE: -3.058324 * MEDIAN LONGITUDE: 37.348131 * SOUTH-BOUND LATITUDE: -3.059926 * WEST-BOUND LONGITUDE: 37.344638 * NORTH-BOUND LATITUDE: -3.055993 * EAST-BOUND LONGITUDE: 37.353663 |
long_lat |
ENVELOPE(37.344638,37.353663,-3.055993,-3.059926) |
genre |
ice core The Cryosphere |
genre_facet |
ice core The Cryosphere |
op_source |
Supplement to: Bohleber, Pascal; Sold, Leo; Hardy, Douglas R; Schwikowski, Margit; Klenk, Patrick; Fischer, Andrea; Sirguey, Pascal; Cullen, Nicolas J; Potocki, Mariusz; Hoffmann, Helene; Mayewski, Paul (2017): Ground-penetrating radar reveals ice thickness and undisturbed englacial layers at Kilimanjaro's Northern Ice Field. The Cryosphere, 11(1), 469-482, https://doi.org/10.5194/tc-11-469-2017 |
op_relation |
https://doi.pangaea.de/10.1594/PANGAEA.867908 https://doi.org/10.1594/PANGAEA.867908 |
op_rights |
CC-BY-3.0: Creative Commons Attribution 3.0 Unported Access constraints: unrestricted info:eu-repo/semantics/openAccess |
op_rightsnorm |
CC-BY |
op_doi |
https://doi.org/10.1594/PANGAEA.867908 https://doi.org/10.5194/tc-11-469-2017 |
_version_ |
1766029590761832448 |