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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Cambridge University Press
2017
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ftdoajarticles:oai:doaj.org/article:add2fbc298124c2fa7f053f10b5a071f 2023-05-15T16:57:34+02:00 A plot-scale study of firn stratigraphy at Lomonosovfonna, Svalbard, using ice cores, borehole video and GPR surveys in 2012–14 SERGEY MARCHENKO VEIJO A. POHJOLA RICKARD PETTERSSON WARD J. J. VAN PELT CARMEN P. VEGA HORST MACHGUTH CARL E. BØGGILD ELISABETH ISAKSSON 2017-02-01T00:00:00Z https://doi.org/10.1017/jog.2016.118 https://doaj.org/article/add2fbc298124c2fa7f053f10b5a071f EN eng Cambridge University Press https://www.cambridge.org/core/product/identifier/S0022143016001180/type/journal_article https://doaj.org/toc/0022-1430 https://doaj.org/toc/1727-5652 doi:10.1017/jog.2016.118 0022-1430 1727-5652 https://doaj.org/article/add2fbc298124c2fa7f053f10b5a071f Journal of Glaciology, Vol 63, Pp 67-78 (2017) borehole video firn core radar stratigraphy Environmental sciences GE1-350 Meteorology. Climatology QC851-999 article 2017 ftdoajarticles https://doi.org/10.1017/jog.2016.118 2023-03-12T01:30:59Z 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 Directory of Open Access Journals: DOAJ Articles Lomonosovfonna ENVELOPE(17.663,17.663,78.774,78.774) Svalbard Journal of Glaciology 63 237 67 78 |
institution |
Open Polar |
collection |
Directory of Open Access Journals: DOAJ Articles |
op_collection_id |
ftdoajarticles |
language |
English |
topic |
borehole video firn core radar stratigraphy Environmental sciences GE1-350 Meteorology. Climatology QC851-999 |
spellingShingle |
borehole video firn core radar stratigraphy Environmental sciences GE1-350 Meteorology. Climatology QC851-999 SERGEY MARCHENKO VEIJO A. POHJOLA RICKARD PETTERSSON WARD J. J. VAN PELT CARMEN P. VEGA HORST MACHGUTH CARL E. BØGGILD ELISABETH ISAKSSON A plot-scale study of firn stratigraphy at Lomonosovfonna, Svalbard, using ice cores, borehole video and GPR surveys in 2012–14 |
topic_facet |
borehole video firn core radar stratigraphy Environmental sciences GE1-350 Meteorology. Climatology QC851-999 |
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 |
SERGEY MARCHENKO VEIJO A. POHJOLA RICKARD PETTERSSON WARD J. J. VAN PELT CARMEN P. VEGA HORST MACHGUTH CARL E. BØGGILD ELISABETH ISAKSSON |
author_facet |
SERGEY MARCHENKO VEIJO A. POHJOLA RICKARD PETTERSSON WARD J. J. VAN PELT CARMEN P. VEGA HORST MACHGUTH CARL E. BØGGILD ELISABETH ISAKSSON |
author_sort |
SERGEY MARCHENKO |
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 |
Cambridge University Press |
publishDate |
2017 |
url |
https://doi.org/10.1017/jog.2016.118 https://doaj.org/article/add2fbc298124c2fa7f053f10b5a071f |
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 |
Journal of Glaciology, Vol 63, Pp 67-78 (2017) |
op_relation |
https://www.cambridge.org/core/product/identifier/S0022143016001180/type/journal_article https://doaj.org/toc/0022-1430 https://doaj.org/toc/1727-5652 doi:10.1017/jog.2016.118 0022-1430 1727-5652 https://doaj.org/article/add2fbc298124c2fa7f053f10b5a071f |
op_doi |
https://doi.org/10.1017/jog.2016.118 |
container_title |
Journal of Glaciology |
container_volume |
63 |
container_issue |
237 |
container_start_page |
67 |
op_container_end_page |
78 |
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1766049124838277120 |