A plot-scale study of firn stratigraphy at Lomonosovfonna, Svalbard, using ice cores, borehole video and GPR surveys in 2012–14
Spatial heterogeneity of snow and firn properties on glaciers introduces uncertainty in interpretation of point and profile observations and complicates modelling of meltwater percolation and runoff. Here we present a study of the temporal and spatial dynamics of firn density and stratigraphy at the...
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International Glaciological Society
2017
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Online Access: | https://www.zora.uzh.ch/id/eprint/136485/ https://www.zora.uzh.ch/id/eprint/136485/1/marchenko_JG_2016.pdf https://doi.org/10.5167/uzh-136485 https://doi.org/10.1017/jog.2016.118 |
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ftunivzuerich:oai:www.zora.uzh.ch:136485 2024-06-23T07:54:16+00:00 A plot-scale study of firn stratigraphy at Lomonosovfonna, Svalbard, using ice cores, borehole video and GPR surveys in 2012–14 Marchenko, Sergey Pohjola, Veijo A Pettersson, Rickard van Pelt, Ward J J Vega, Carmen P Machguth, Horst Bøggild, Carl E Isaksson, Elisabeth 2017 application/pdf https://www.zora.uzh.ch/id/eprint/136485/ https://www.zora.uzh.ch/id/eprint/136485/1/marchenko_JG_2016.pdf https://doi.org/10.5167/uzh-136485 https://doi.org/10.1017/jog.2016.118 eng eng International Glaciological Society https://www.zora.uzh.ch/id/eprint/136485/1/marchenko_JG_2016.pdf doi:10.5167/uzh-136485 doi:10.1017/jog.2016.118 urn:issn:0022-1430 info:eu-repo/semantics/openAccess Creative Commons: Attribution-NonCommercial-ShareAlike 4.0 International (CC BY-NC-SA 4.0) http://creativecommons.org/licenses/by-nc-sa/4.0/ Marchenko, Sergey; Pohjola, Veijo A; Pettersson, Rickard; van Pelt, Ward J J; Vega, Carmen P; Machguth, Horst; Bøggild, Carl E; Isaksson, Elisabeth (2017). A plot-scale study of firn stratigraphy at Lomonosovfonna, Svalbard, using ice cores, borehole video and GPR surveys in 2012–14. Journal of Glaciology, 63(237):67-78. Institute of Geography 910 Geography & travel Journal Article PeerReviewed info:eu-repo/semantics/article info:eu-repo/semantics/publishedVersion 2017 ftunivzuerich https://doi.org/10.5167/uzh-13648510.1017/jog.2016.118 2024-05-29T00:39:00Z Spatial heterogeneity of snow and firn properties on glaciers introduces uncertainty in interpretation of point and profile observations and complicates modelling of meltwater percolation and runoff. Here we present a study of the temporal and spatial dynamics of firn density and stratigraphy at the plot-scale (≈10 m × 10 m × 10 m) repeated annually during 2012–14 at the Lomonosovfonna icefield, Svalbard. Results from cores, video inspections in boreholes and radar grid surveys are compared. Ice layers 0.1–50 cm thick comprised ≈8% of the borehole length. Most of them are 1–3 cm thick and could not be traced between boreholes separated by 3 m. Large lateral variability of firn structure affects representativeness of observations in single holes and calls for repeated studies in multiple points to derive a representative stratigraphy signal. Radar reflections are poorly correlated with ice layers in individual boreholes. However, the match between the high amplitude peaks in the grid-averaged radar signal and horizons of preferential ice layer formation revealed by averaging the video surveys over multiple boreholes is higher. These horizons are interpreted as buried firn layers previously exposed to melt-freeze or wind-driven densification and several of them are consistently recovered throughout three field campaigns. Article in Journal/Newspaper Journal of Glaciology Svalbard University of Zurich (UZH): ZORA (Zurich Open Repository and Archive Lomonosovfonna ENVELOPE(17.663,17.663,78.774,78.774) Svalbard |
institution |
Open Polar |
collection |
University of Zurich (UZH): ZORA (Zurich Open Repository and Archive |
op_collection_id |
ftunivzuerich |
language |
English |
topic |
Institute of Geography 910 Geography & travel |
spellingShingle |
Institute of Geography 910 Geography & travel Marchenko, Sergey Pohjola, Veijo A Pettersson, Rickard van Pelt, Ward J J Vega, Carmen P Machguth, Horst Bøggild, Carl E Isaksson, Elisabeth A plot-scale study of firn stratigraphy at Lomonosovfonna, Svalbard, using ice cores, borehole video and GPR surveys in 2012–14 |
topic_facet |
Institute of Geography 910 Geography & travel |
description |
Spatial heterogeneity of snow and firn properties on glaciers introduces uncertainty in interpretation of point and profile observations and complicates modelling of meltwater percolation and runoff. Here we present a study of the temporal and spatial dynamics of firn density and stratigraphy at the plot-scale (≈10 m × 10 m × 10 m) repeated annually during 2012–14 at the Lomonosovfonna icefield, Svalbard. Results from cores, video inspections in boreholes and radar grid surveys are compared. Ice layers 0.1–50 cm thick comprised ≈8% of the borehole length. Most of them are 1–3 cm thick and could not be traced between boreholes separated by 3 m. Large lateral variability of firn structure affects representativeness of observations in single holes and calls for repeated studies in multiple points to derive a representative stratigraphy signal. Radar reflections are poorly correlated with ice layers in individual boreholes. However, the match between the high amplitude peaks in the grid-averaged radar signal and horizons of preferential ice layer formation revealed by averaging the video surveys over multiple boreholes is higher. These horizons are interpreted as buried firn layers previously exposed to melt-freeze or wind-driven densification and several of them are consistently recovered throughout three field campaigns. |
format |
Article in Journal/Newspaper |
author |
Marchenko, Sergey Pohjola, Veijo A Pettersson, Rickard van Pelt, Ward J J Vega, Carmen P Machguth, Horst Bøggild, Carl E Isaksson, Elisabeth |
author_facet |
Marchenko, Sergey Pohjola, Veijo A Pettersson, Rickard van Pelt, Ward J J Vega, Carmen P Machguth, Horst Bøggild, Carl E Isaksson, Elisabeth |
author_sort |
Marchenko, Sergey |
title |
A plot-scale study of firn stratigraphy at Lomonosovfonna, Svalbard, using ice cores, borehole video and GPR surveys in 2012–14 |
title_short |
A plot-scale study of firn stratigraphy at Lomonosovfonna, Svalbard, using ice cores, borehole video and GPR surveys in 2012–14 |
title_full |
A plot-scale study of firn stratigraphy at Lomonosovfonna, Svalbard, using ice cores, borehole video and GPR surveys in 2012–14 |
title_fullStr |
A plot-scale study of firn stratigraphy at Lomonosovfonna, Svalbard, using ice cores, borehole video and GPR surveys in 2012–14 |
title_full_unstemmed |
A plot-scale study of firn stratigraphy at Lomonosovfonna, Svalbard, using ice cores, borehole video and GPR surveys in 2012–14 |
title_sort |
plot-scale study of firn stratigraphy at lomonosovfonna, svalbard, using ice cores, borehole video and gpr surveys in 2012–14 |
publisher |
International Glaciological Society |
publishDate |
2017 |
url |
https://www.zora.uzh.ch/id/eprint/136485/ https://www.zora.uzh.ch/id/eprint/136485/1/marchenko_JG_2016.pdf https://doi.org/10.5167/uzh-136485 https://doi.org/10.1017/jog.2016.118 |
long_lat |
ENVELOPE(17.663,17.663,78.774,78.774) |
geographic |
Lomonosovfonna Svalbard |
geographic_facet |
Lomonosovfonna Svalbard |
genre |
Journal of Glaciology Svalbard |
genre_facet |
Journal of Glaciology Svalbard |
op_source |
Marchenko, Sergey; Pohjola, Veijo A; Pettersson, Rickard; van Pelt, Ward J J; Vega, Carmen P; Machguth, Horst; Bøggild, Carl E; Isaksson, Elisabeth (2017). A plot-scale study of firn stratigraphy at Lomonosovfonna, Svalbard, using ice cores, borehole video and GPR surveys in 2012–14. Journal of Glaciology, 63(237):67-78. |
op_relation |
https://www.zora.uzh.ch/id/eprint/136485/1/marchenko_JG_2016.pdf doi:10.5167/uzh-136485 doi:10.1017/jog.2016.118 urn:issn:0022-1430 |
op_rights |
info:eu-repo/semantics/openAccess Creative Commons: Attribution-NonCommercial-ShareAlike 4.0 International (CC BY-NC-SA 4.0) http://creativecommons.org/licenses/by-nc-sa/4.0/ |
op_doi |
https://doi.org/10.5167/uzh-13648510.1017/jog.2016.118 |
_version_ |
1802646384254386176 |