GEM-2 ice and platelet total thickness measurements for transect AFIN_ATKA_20221105
The snow+ice thickness (distance from the snow surface to the consolidated ice-platelet ice interface) and the underlying platelet ice thickness was measured by the electromagnetic induction (EM) method. On all transects, we used a multi-frequency EM instrument sensor (GEM-2 by Geophex Ltd) towed on...
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Online Access: | https://doi.pangaea.de/10.1594/PANGAEA.968075 |
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ftpangaea:oai:pangaea.de:doi:10.1594/PANGAEA.968075 |
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openpolar |
institution |
Open Polar |
collection |
PANGAEA - Data Publisher for Earth & Environmental Science |
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ftpangaea |
language |
English |
topic |
AFIN AFIN_ATKA_20221105 AFIN2022 AFIN2022plus Antarctica Antarctic Fast Ice Network ANT-Land_2022_AFIN Atka Bay AWI_SeaIce DATE/TIME DFG-SPP1158 Distance GEM-2 Ground-based Electromagnetic Induction Sounding Device LATITUDE LONGITUDE Multi-frequncy inversion modified framework of the EMagPy (McLachlan et al. 2020) NEUMAYER III Priority Programme 1158 Antarctic Research with Comparable Investigations in Arctic Sea Ice Areas Sea ice Sea ice and snow conductivity Sea ice and snow thickness Sea Ice Physics @ AWI Signal strength SPP1158 Sub-ice platelet layer Sub-ice platelet-layer conductivity Sub-ice platelet-layer thickness |
spellingShingle |
AFIN AFIN_ATKA_20221105 AFIN2022 AFIN2022plus Antarctica Antarctic Fast Ice Network ANT-Land_2022_AFIN Atka Bay AWI_SeaIce DATE/TIME DFG-SPP1158 Distance GEM-2 Ground-based Electromagnetic Induction Sounding Device LATITUDE LONGITUDE Multi-frequncy inversion modified framework of the EMagPy (McLachlan et al. 2020) NEUMAYER III Priority Programme 1158 Antarctic Research with Comparable Investigations in Arctic Sea Ice Areas Sea ice Sea ice and snow conductivity Sea ice and snow thickness Sea Ice Physics @ AWI Signal strength SPP1158 Sub-ice platelet layer Sub-ice platelet-layer conductivity Sub-ice platelet-layer thickness Neudert, Mara Arndt, Stefanie GEM-2 ice and platelet total thickness measurements for transect AFIN_ATKA_20221105 |
topic_facet |
AFIN AFIN_ATKA_20221105 AFIN2022 AFIN2022plus Antarctica Antarctic Fast Ice Network ANT-Land_2022_AFIN Atka Bay AWI_SeaIce DATE/TIME DFG-SPP1158 Distance GEM-2 Ground-based Electromagnetic Induction Sounding Device LATITUDE LONGITUDE Multi-frequncy inversion modified framework of the EMagPy (McLachlan et al. 2020) NEUMAYER III Priority Programme 1158 Antarctic Research with Comparable Investigations in Arctic Sea Ice Areas Sea ice Sea ice and snow conductivity Sea ice and snow thickness Sea Ice Physics @ AWI Signal strength SPP1158 Sub-ice platelet layer Sub-ice platelet-layer conductivity Sub-ice platelet-layer thickness |
description |
The snow+ice thickness (distance from the snow surface to the consolidated ice-platelet ice interface) and the underlying platelet ice thickness was measured by the electromagnetic induction (EM) method. On all transects, we used a multi-frequency EM instrument sensor (GEM-2 by Geophex Ltd) towed on a small sled behind a snowmobile (Hunkeler et al, 2016b). The instrument includes a real-time data processing unit including a GPS receiver which communicates with a pocket PC that is operates the sensor and records the EM and GPS data streams. The GEM-2 is a multi-frequency sensor that can transmit multiple configurable frequencies in the kHz range simultaneously. The sensor setup during AFIN used 5 frequencies with an approximately logarithmic spacing throughout the frequency range of the sensor (1.53, 5.31, 18.33, 63.03, and 93.09 kHz). The transect measurements are based on a sensor calibration, where the GEM-2 was placed in a zero-conductivity environment on the ice shelf before and after each transect to correct for signal offsets in instrument drift. The snow+ice and platelet ice thickness and conductivity retrieval of the calibrated GEM-2 surveys data was done by multi-frequncy inversion in the modified framework of the EMagPy (McLachlan et al., 2020) accounting for the bucking coil bias (Hunkeler at al., 2016a). To validate the retrieved thicknesses, we used the snow depth, ice thickness and platelet ice thickness from the drill hole measurements coincident with the GEM-2 transects. The coincident drill hole data can be found here: doi:10.1594/PANGAEA.968459. For more details we refer to the paper by Neudert et al, 2024: Improved sub-Ice Platelet Layer Mapping with multi-frequency EM Induction Sounding, in review at Journal of Applied Geophysics, Elsevier. |
format |
Dataset |
author |
Neudert, Mara Arndt, Stefanie |
author_facet |
Neudert, Mara Arndt, Stefanie |
author_sort |
Neudert, Mara |
title |
GEM-2 ice and platelet total thickness measurements for transect AFIN_ATKA_20221105 |
title_short |
GEM-2 ice and platelet total thickness measurements for transect AFIN_ATKA_20221105 |
title_full |
GEM-2 ice and platelet total thickness measurements for transect AFIN_ATKA_20221105 |
title_fullStr |
GEM-2 ice and platelet total thickness measurements for transect AFIN_ATKA_20221105 |
title_full_unstemmed |
GEM-2 ice and platelet total thickness measurements for transect AFIN_ATKA_20221105 |
title_sort |
gem-2 ice and platelet total thickness measurements for transect afin_atka_20221105 |
publisher |
PANGAEA |
url |
https://doi.pangaea.de/10.1594/PANGAEA.968075 |
op_coverage |
MEDIAN LATITUDE: -70.608101 * MEDIAN LONGITUDE: -8.015419 * SOUTH-BOUND LATITUDE: -70.675208 * WEST-BOUND LONGITUDE: -8.136748 * NORTH-BOUND LATITUDE: -70.546658 * EAST-BOUND LONGITUDE: -7.959964 * DATE/TIME START: 2022-11-05T10:18:19 * DATE/TIME END: 2022-11-05T21:01:38 |
long_lat |
ENVELOPE(151.789,151.789,60.835,60.835) ENVELOPE(-8.136748,-7.959964,-70.546658,-70.675208) |
geographic |
Antarctic Arctic Atka Neumayer |
geographic_facet |
Antarctic Arctic Atka Neumayer |
genre |
Antarc* Antarctic Antarctica Arctic Ice Shelf Sea ice |
genre_facet |
Antarc* Antarctic Antarctica Arctic Ice Shelf Sea ice |
op_relation |
https://doi.pangaea.de/10.1594/PANGAEA.968041 Hunkeler, Priska A; Hendricks, Stefan; Hoppmann, Mario; Farquharson, Colin G; Kalscheuer, Thomas; Grab, Melchior; Kaufmann, Manuela S; Rabenstein, Lasse; Gerdes, Rüdiger (2016): Improved 1D inversions for sea ice thickness and conductivity from electromagnetic induction data: Inclusion of nonlinearities caused by passive bucking. Geophysics, 81(1), WA45-WA58, https://doi.org/10.1190/geo2015-0130.1 Hunkeler, Priska A; Hoppmann, Mario; Hendricks, Stefan; Kalscheuer, Thomas; Gerdes, Rüdiger (2016): A glimpse beneath Antarctic landfast sea ice: platelet-layer volume from multi-frequency electromagnetic induction sounding. Geophysical Research Letters, 43(1), 222-231, https://doi.org/10.1002/2015GL065074 McLachlan, Paul; Blanchy, Guillaume; Binley, Andrew (2021): EMagPy: Open-source standalone software for processing, forward modeling and inversion of electromagnetic induction data. Computers & Geosciences, 146, 104561, https://doi.org/10.1016/j.cageo.2020.104561 https://doi.pangaea.de/10.1594/PANGAEA.968075 |
op_rights |
CC-BY-4.0: Creative Commons Attribution 4.0 International (License comes into effect after moratorium ends) Access constraints: access rights needed info:eu-repo/semantics/restrictedAccess |
op_doi |
https://doi.org/10.1190/geo2015-0130.110.1002/2015GL065074 |
_version_ |
1811643241017114624 |
spelling |
ftpangaea:oai:pangaea.de:doi:10.1594/PANGAEA.968075 2024-09-30T14:25:03+00:00 GEM-2 ice and platelet total thickness measurements for transect AFIN_ATKA_20221105 Neudert, Mara Arndt, Stefanie MEDIAN LATITUDE: -70.608101 * MEDIAN LONGITUDE: -8.015419 * SOUTH-BOUND LATITUDE: -70.675208 * WEST-BOUND LONGITUDE: -8.136748 * NORTH-BOUND LATITUDE: -70.546658 * EAST-BOUND LONGITUDE: -7.959964 * DATE/TIME START: 2022-11-05T10:18:19 * DATE/TIME END: 2022-11-05T21:01:38 text/tab-separated-values, 432075 data points https://doi.pangaea.de/10.1594/PANGAEA.968075 en eng PANGAEA https://doi.pangaea.de/10.1594/PANGAEA.968041 Hunkeler, Priska A; Hendricks, Stefan; Hoppmann, Mario; Farquharson, Colin G; Kalscheuer, Thomas; Grab, Melchior; Kaufmann, Manuela S; Rabenstein, Lasse; Gerdes, Rüdiger (2016): Improved 1D inversions for sea ice thickness and conductivity from electromagnetic induction data: Inclusion of nonlinearities caused by passive bucking. Geophysics, 81(1), WA45-WA58, https://doi.org/10.1190/geo2015-0130.1 Hunkeler, Priska A; Hoppmann, Mario; Hendricks, Stefan; Kalscheuer, Thomas; Gerdes, Rüdiger (2016): A glimpse beneath Antarctic landfast sea ice: platelet-layer volume from multi-frequency electromagnetic induction sounding. Geophysical Research Letters, 43(1), 222-231, https://doi.org/10.1002/2015GL065074 McLachlan, Paul; Blanchy, Guillaume; Binley, Andrew (2021): EMagPy: Open-source standalone software for processing, forward modeling and inversion of electromagnetic induction data. Computers & Geosciences, 146, 104561, https://doi.org/10.1016/j.cageo.2020.104561 https://doi.pangaea.de/10.1594/PANGAEA.968075 CC-BY-4.0: Creative Commons Attribution 4.0 International (License comes into effect after moratorium ends) Access constraints: access rights needed info:eu-repo/semantics/restrictedAccess AFIN AFIN_ATKA_20221105 AFIN2022 AFIN2022plus Antarctica Antarctic Fast Ice Network ANT-Land_2022_AFIN Atka Bay AWI_SeaIce DATE/TIME DFG-SPP1158 Distance GEM-2 Ground-based Electromagnetic Induction Sounding Device LATITUDE LONGITUDE Multi-frequncy inversion modified framework of the EMagPy (McLachlan et al. 2020) NEUMAYER III Priority Programme 1158 Antarctic Research with Comparable Investigations in Arctic Sea Ice Areas Sea ice Sea ice and snow conductivity Sea ice and snow thickness Sea Ice Physics @ AWI Signal strength SPP1158 Sub-ice platelet layer Sub-ice platelet-layer conductivity Sub-ice platelet-layer thickness dataset ftpangaea https://doi.org/10.1190/geo2015-0130.110.1002/2015GL065074 2024-09-03T23:52:04Z The snow+ice thickness (distance from the snow surface to the consolidated ice-platelet ice interface) and the underlying platelet ice thickness was measured by the electromagnetic induction (EM) method. On all transects, we used a multi-frequency EM instrument sensor (GEM-2 by Geophex Ltd) towed on a small sled behind a snowmobile (Hunkeler et al, 2016b). The instrument includes a real-time data processing unit including a GPS receiver which communicates with a pocket PC that is operates the sensor and records the EM and GPS data streams. The GEM-2 is a multi-frequency sensor that can transmit multiple configurable frequencies in the kHz range simultaneously. The sensor setup during AFIN used 5 frequencies with an approximately logarithmic spacing throughout the frequency range of the sensor (1.53, 5.31, 18.33, 63.03, and 93.09 kHz). The transect measurements are based on a sensor calibration, where the GEM-2 was placed in a zero-conductivity environment on the ice shelf before and after each transect to correct for signal offsets in instrument drift. The snow+ice and platelet ice thickness and conductivity retrieval of the calibrated GEM-2 surveys data was done by multi-frequncy inversion in the modified framework of the EMagPy (McLachlan et al., 2020) accounting for the bucking coil bias (Hunkeler at al., 2016a). To validate the retrieved thicknesses, we used the snow depth, ice thickness and platelet ice thickness from the drill hole measurements coincident with the GEM-2 transects. The coincident drill hole data can be found here: doi:10.1594/PANGAEA.968459. For more details we refer to the paper by Neudert et al, 2024: Improved sub-Ice Platelet Layer Mapping with multi-frequency EM Induction Sounding, in review at Journal of Applied Geophysics, Elsevier. Dataset Antarc* Antarctic Antarctica Arctic Ice Shelf Sea ice PANGAEA - Data Publisher for Earth & Environmental Science Antarctic Arctic Atka ENVELOPE(151.789,151.789,60.835,60.835) Neumayer ENVELOPE(-8.136748,-7.959964,-70.546658,-70.675208) |