Reconstruction of Historical Surface Mass Balance, 1984–2017 from GreenTraACS Multi-Offset Ground-Penetrating Radar
We present continuous estimates of snow and firn density, layer depth and accumulation from a multi-channel, multi-offset, ground-penetrating radar traverse. Our method uses the electromagnetic velocity, estimated from waveform travel-times measured at common-midpoints between sources and receivers....
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ftboisestateu:oai:scholarworks.boisestate.edu:geo_facpubs-1581 2023-10-29T02:36:29+01:00 Reconstruction of Historical Surface Mass Balance, 1984–2017 from GreenTraACS Multi-Offset Ground-Penetrating Radar Meehan, Tate G. Marshall, H.P. 2021-04-01T07:00:00Z application/pdf https://scholarworks.boisestate.edu/geo_facpubs/576 https://scholarworks.boisestate.edu/context/geo_facpubs/article/1581/viewcontent/Marshall__Hans_Peter__2021__Reconstruction_of_historical_surface___pub.pdf unknown ScholarWorks https://scholarworks.boisestate.edu/geo_facpubs/576 https://scholarworks.boisestate.edu/context/geo_facpubs/article/1581/viewcontent/Marshall__Hans_Peter__2021__Reconstruction_of_historical_surface___pub.pdf http://creativecommons.org/licenses/by/4.0/ Geosciences Faculty Publications and Presentations glacier geophysics ground-penetrating radar polar firn surface mass budget CGISS Earth Sciences Geophysics and Seismology text 2021 ftboisestateu 2023-09-29T15:21:38Z We present continuous estimates of snow and firn density, layer depth and accumulation from a multi-channel, multi-offset, ground-penetrating radar traverse. Our method uses the electromagnetic velocity, estimated from waveform travel-times measured at common-midpoints between sources and receivers. Previously, common-midpoint radar experiments on ice sheets have been limited to point observations. We completed radar velocity analysis in the upper ∼2 m to estimate the surface and average snow density of the Greenland Ice Sheet. We parameterized the Herron and Langway (1980) firn density and age model using the radar-derived snow density, radar-derived surface mass balance (2015–2017) and reanalysis-derived temperature data. We applied structure-oriented filtering to the radar image along constant age horizons and increased the depth at which horizons could be reliably interpreted.We reconstructed the historical instantaneous surface mass balance, which we averaged into annual and multidecadal products along a 78 km traverse for the period 1984–2017. We found good agreement between our physically constrained parameterization and a firn core collected from the dry snow accumulation zone, and gained insights into the spatial correlation of surface snow density. Text glacier Greenland Ice Sheet Boise State University: Scholar Works |
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Open Polar |
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Boise State University: Scholar Works |
op_collection_id |
ftboisestateu |
language |
unknown |
topic |
glacier geophysics ground-penetrating radar polar firn surface mass budget CGISS Earth Sciences Geophysics and Seismology |
spellingShingle |
glacier geophysics ground-penetrating radar polar firn surface mass budget CGISS Earth Sciences Geophysics and Seismology Meehan, Tate G. Marshall, H.P. Reconstruction of Historical Surface Mass Balance, 1984–2017 from GreenTraACS Multi-Offset Ground-Penetrating Radar |
topic_facet |
glacier geophysics ground-penetrating radar polar firn surface mass budget CGISS Earth Sciences Geophysics and Seismology |
description |
We present continuous estimates of snow and firn density, layer depth and accumulation from a multi-channel, multi-offset, ground-penetrating radar traverse. Our method uses the electromagnetic velocity, estimated from waveform travel-times measured at common-midpoints between sources and receivers. Previously, common-midpoint radar experiments on ice sheets have been limited to point observations. We completed radar velocity analysis in the upper ∼2 m to estimate the surface and average snow density of the Greenland Ice Sheet. We parameterized the Herron and Langway (1980) firn density and age model using the radar-derived snow density, radar-derived surface mass balance (2015–2017) and reanalysis-derived temperature data. We applied structure-oriented filtering to the radar image along constant age horizons and increased the depth at which horizons could be reliably interpreted.We reconstructed the historical instantaneous surface mass balance, which we averaged into annual and multidecadal products along a 78 km traverse for the period 1984–2017. We found good agreement between our physically constrained parameterization and a firn core collected from the dry snow accumulation zone, and gained insights into the spatial correlation of surface snow density. |
format |
Text |
author |
Meehan, Tate G. Marshall, H.P. |
author_facet |
Meehan, Tate G. Marshall, H.P. |
author_sort |
Meehan, Tate G. |
title |
Reconstruction of Historical Surface Mass Balance, 1984–2017 from GreenTraACS Multi-Offset Ground-Penetrating Radar |
title_short |
Reconstruction of Historical Surface Mass Balance, 1984–2017 from GreenTraACS Multi-Offset Ground-Penetrating Radar |
title_full |
Reconstruction of Historical Surface Mass Balance, 1984–2017 from GreenTraACS Multi-Offset Ground-Penetrating Radar |
title_fullStr |
Reconstruction of Historical Surface Mass Balance, 1984–2017 from GreenTraACS Multi-Offset Ground-Penetrating Radar |
title_full_unstemmed |
Reconstruction of Historical Surface Mass Balance, 1984–2017 from GreenTraACS Multi-Offset Ground-Penetrating Radar |
title_sort |
reconstruction of historical surface mass balance, 1984–2017 from greentraacs multi-offset ground-penetrating radar |
publisher |
ScholarWorks |
publishDate |
2021 |
url |
https://scholarworks.boisestate.edu/geo_facpubs/576 https://scholarworks.boisestate.edu/context/geo_facpubs/article/1581/viewcontent/Marshall__Hans_Peter__2021__Reconstruction_of_historical_surface___pub.pdf |
genre |
glacier Greenland Ice Sheet |
genre_facet |
glacier Greenland Ice Sheet |
op_source |
Geosciences Faculty Publications and Presentations |
op_relation |
https://scholarworks.boisestate.edu/geo_facpubs/576 https://scholarworks.boisestate.edu/context/geo_facpubs/article/1581/viewcontent/Marshall__Hans_Peter__2021__Reconstruction_of_historical_surface___pub.pdf |
op_rights |
http://creativecommons.org/licenses/by/4.0/ |
_version_ |
1781060463154429952 |