Full-physics 3-D heterogeneous simulations of electromagnetic induction fields on level and deformed sea ice
Publisher's PDF In this paper we explore simulated responses of electromagnetic (EM) signals relative to in situ field surveys and quantify the effects that different values of conductivity in sea ice have on the EM fields. We compute EM responses of ice types with a three-dimensional (3-D) fin...
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Online Access: | http://udspace.udel.edu/handle/19716/17348 https://doi.org/10.3189/2015AoG69A737 |
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ftunivdelaware:oai:udspace.udel.edu:19716/17348 2024-04-28T07:55:30+00:00 Full-physics 3-D heterogeneous simulations of electromagnetic induction fields on level and deformed sea ice Samluk, Jesse P. Geiger, Cathleen A. Weiss, Chester J. Jesse P. SAMLUK, Cathleen A. GEIGER, Chester J. WEISS Samluk, Jesse P. Geiger, Cathleen A. 2015-10-01 application/pdf http://udspace.udel.edu/handle/19716/17348 https://doi.org/10.3189/2015AoG69A737 en_US eng International Glaciological Society SAMLUK, Jesse P., Cathleen A. GEIGER, and Chester J. WEISS. "Full-physics 3-D heterogeneous simulations of electromagnetic induction fields on level and deformed sea ice." Annals of Glaciology 56.69 (2015): 405. 0260-3055 e- 1727-5644 http://udspace.udel.edu/handle/19716/17348 doi:10.3189/2015AoG69A737 Article is made available in accordance with the publisher's policy and may be subject to US copyright law. Please refer to the publisher's site for terms of use. http://www.igsoc.org/annals/ Article 2015 ftunivdelaware https://doi.org/10.3189/2015AoG69A737 2024-04-03T14:05:00Z Publisher's PDF In this paper we explore simulated responses of electromagnetic (EM) signals relative to in situ field surveys and quantify the effects that different values of conductivity in sea ice have on the EM fields. We compute EM responses of ice types with a three-dimensional (3-D) finite-volume discretization of Maxwell’s equations and present 2-D sliced visualizations of their associated EM fields at discrete frequencies. Several interesting observations result: First, since the simulator computes the fields everywhere, each gridcell acts as a receiver within the model volume, and captures the complete, coupled interactions between air, snow, sea ice and sea water as a function of their conductivity; second, visualizations demonstrate how 1-D approximations near deformed ice features are violated. But the most important new finding is that changes in conductivity affect EM field response by modifying the magnitude and spatial patterns (i.e. footprint size and shape) of current density and magnetic fields. These effects are demonstrated through a visual feature we define as ‘null lines’. Null line shape is affected by changes in conductivity near material boundaries as well as transmitter location. Our results encourage the use of null lines as a planning tool for better ground-truth field measurements near deformed ice types. University of Delaware. Department of Geography. University of Delaware. Department of Electrical and Computer Engineering. Article in Journal/Newspaper Annals of Glaciology Sea ice The University of Delaware Library Institutional Repository Annals of Glaciology 56 69 405 414 |
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Open Polar |
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The University of Delaware Library Institutional Repository |
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ftunivdelaware |
language |
English |
description |
Publisher's PDF In this paper we explore simulated responses of electromagnetic (EM) signals relative to in situ field surveys and quantify the effects that different values of conductivity in sea ice have on the EM fields. We compute EM responses of ice types with a three-dimensional (3-D) finite-volume discretization of Maxwell’s equations and present 2-D sliced visualizations of their associated EM fields at discrete frequencies. Several interesting observations result: First, since the simulator computes the fields everywhere, each gridcell acts as a receiver within the model volume, and captures the complete, coupled interactions between air, snow, sea ice and sea water as a function of their conductivity; second, visualizations demonstrate how 1-D approximations near deformed ice features are violated. But the most important new finding is that changes in conductivity affect EM field response by modifying the magnitude and spatial patterns (i.e. footprint size and shape) of current density and magnetic fields. These effects are demonstrated through a visual feature we define as ‘null lines’. Null line shape is affected by changes in conductivity near material boundaries as well as transmitter location. Our results encourage the use of null lines as a planning tool for better ground-truth field measurements near deformed ice types. University of Delaware. Department of Geography. University of Delaware. Department of Electrical and Computer Engineering. |
author2 |
Jesse P. SAMLUK, Cathleen A. GEIGER, Chester J. WEISS Samluk, Jesse P. Geiger, Cathleen A. |
format |
Article in Journal/Newspaper |
author |
Samluk, Jesse P. Geiger, Cathleen A. Weiss, Chester J. |
spellingShingle |
Samluk, Jesse P. Geiger, Cathleen A. Weiss, Chester J. Full-physics 3-D heterogeneous simulations of electromagnetic induction fields on level and deformed sea ice |
author_facet |
Samluk, Jesse P. Geiger, Cathleen A. Weiss, Chester J. |
author_sort |
Samluk, Jesse P. |
title |
Full-physics 3-D heterogeneous simulations of electromagnetic induction fields on level and deformed sea ice |
title_short |
Full-physics 3-D heterogeneous simulations of electromagnetic induction fields on level and deformed sea ice |
title_full |
Full-physics 3-D heterogeneous simulations of electromagnetic induction fields on level and deformed sea ice |
title_fullStr |
Full-physics 3-D heterogeneous simulations of electromagnetic induction fields on level and deformed sea ice |
title_full_unstemmed |
Full-physics 3-D heterogeneous simulations of electromagnetic induction fields on level and deformed sea ice |
title_sort |
full-physics 3-d heterogeneous simulations of electromagnetic induction fields on level and deformed sea ice |
publisher |
International Glaciological Society |
publishDate |
2015 |
url |
http://udspace.udel.edu/handle/19716/17348 https://doi.org/10.3189/2015AoG69A737 |
genre |
Annals of Glaciology Sea ice |
genre_facet |
Annals of Glaciology Sea ice |
op_source |
http://www.igsoc.org/annals/ |
op_relation |
SAMLUK, Jesse P., Cathleen A. GEIGER, and Chester J. WEISS. "Full-physics 3-D heterogeneous simulations of electromagnetic induction fields on level and deformed sea ice." Annals of Glaciology 56.69 (2015): 405. 0260-3055 e- 1727-5644 http://udspace.udel.edu/handle/19716/17348 doi:10.3189/2015AoG69A737 |
op_rights |
Article is made available in accordance with the publisher's policy and may be subject to US copyright law. Please refer to the publisher's site for terms of use. |
op_doi |
https://doi.org/10.3189/2015AoG69A737 |
container_title |
Annals of Glaciology |
container_volume |
56 |
container_issue |
69 |
container_start_page |
405 |
op_container_end_page |
414 |
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1797580194304753664 |