Phase changes of electromagnetic oceanic tidal signals
Over the last years, the number of studies that investigate or utilize the electromagnetic (EM) signals generated by ocean tides is steadily growing. However, the majority of these studies focuses on the amplitudes of EM tidal signals. This study investigates the phases of EM tidal signals and their...
Published in: | Journal of Geophysical Research: Oceans |
---|---|
Main Authors: | , , , |
Format: | Article in Journal/Newspaper |
Language: | unknown |
Published: |
2020
|
Subjects: | |
Online Access: | https://gfzpublic.gfz-potsdam.de/pubman/item/item_5001180 https://gfzpublic.gfz-potsdam.de/pubman/item/item_5001180_4/component/file_5001813/5001180.pdf |
id |
ftgfzpotsdam:oai:gfzpublic.gfz-potsdam.de:item_5001180 |
---|---|
record_format |
openpolar |
spelling |
ftgfzpotsdam:oai:gfzpublic.gfz-potsdam.de:item_5001180 2023-05-15T15:06:42+02:00 Phase changes of electromagnetic oceanic tidal signals Saynisch-Wagner, J. Petereit, J. Irrgang, C. Thomas, M. 2020 application/pdf https://gfzpublic.gfz-potsdam.de/pubman/item/item_5001180 https://gfzpublic.gfz-potsdam.de/pubman/item/item_5001180_4/component/file_5001813/5001180.pdf unknown info:eu-repo/semantics/altIdentifier/doi/10.1029/2019JC015960 https://gfzpublic.gfz-potsdam.de/pubman/item/item_5001180 https://gfzpublic.gfz-potsdam.de/pubman/item/item_5001180_4/component/file_5001813/5001180.pdf info:eu-repo/semantics/openAccess http://creativecommons.org/licenses/by/4.0/ CC-BY Journal of Geophysical Research: Oceans info:eu-repo/semantics/article 2020 ftgfzpotsdam https://doi.org/10.1029/2019JC015960 2022-09-14T05:57:34Z Over the last years, the number of studies that investigate or utilize the electromagnetic (EM) signals generated by ocean tides is steadily growing. However, the majority of these studies focuses on the amplitudes of EM tidal signals. This study investigates the phases of EM tidal signals and their changes. Twenty‐six years of monthly observation‐based datasets of tidal velocities, geomagnetic field, and oceanic conductivity are fed into an EM induction solver to generate varying EM tidal signals. The sensitivities of the resulting EM signals are analyzed by forbidding or allowing the input datasets to vary in time. We report on the phase's sensitivities with respect to changes in the EM properties, that is, secular variation of the geomagnetic field and changes in oceanic conductivity. Distinct temporal behavior and distinct geographic pattern for the two sensitivities can be reported. In general, apart from global phase shifts of 3–5 degrees, concentrated areas with phase shifts of up to 45 degrees occur all over the globe, over the oceans, for example, Arctic and Atlantic Ocean, as well as on coastal land regions, for example, Southwest Greenland and Japan. Very locally, phase shifts of 90 degree or higher occur. Article in Journal/Newspaper Arctic Greenland GFZpublic (German Research Centre for Geosciences, Helmholtz-Zentrum Potsdam) Arctic Greenland Journal of Geophysical Research: Oceans 125 4 |
institution |
Open Polar |
collection |
GFZpublic (German Research Centre for Geosciences, Helmholtz-Zentrum Potsdam) |
op_collection_id |
ftgfzpotsdam |
language |
unknown |
description |
Over the last years, the number of studies that investigate or utilize the electromagnetic (EM) signals generated by ocean tides is steadily growing. However, the majority of these studies focuses on the amplitudes of EM tidal signals. This study investigates the phases of EM tidal signals and their changes. Twenty‐six years of monthly observation‐based datasets of tidal velocities, geomagnetic field, and oceanic conductivity are fed into an EM induction solver to generate varying EM tidal signals. The sensitivities of the resulting EM signals are analyzed by forbidding or allowing the input datasets to vary in time. We report on the phase's sensitivities with respect to changes in the EM properties, that is, secular variation of the geomagnetic field and changes in oceanic conductivity. Distinct temporal behavior and distinct geographic pattern for the two sensitivities can be reported. In general, apart from global phase shifts of 3–5 degrees, concentrated areas with phase shifts of up to 45 degrees occur all over the globe, over the oceans, for example, Arctic and Atlantic Ocean, as well as on coastal land regions, for example, Southwest Greenland and Japan. Very locally, phase shifts of 90 degree or higher occur. |
format |
Article in Journal/Newspaper |
author |
Saynisch-Wagner, J. Petereit, J. Irrgang, C. Thomas, M. |
spellingShingle |
Saynisch-Wagner, J. Petereit, J. Irrgang, C. Thomas, M. Phase changes of electromagnetic oceanic tidal signals |
author_facet |
Saynisch-Wagner, J. Petereit, J. Irrgang, C. Thomas, M. |
author_sort |
Saynisch-Wagner, J. |
title |
Phase changes of electromagnetic oceanic tidal signals |
title_short |
Phase changes of electromagnetic oceanic tidal signals |
title_full |
Phase changes of electromagnetic oceanic tidal signals |
title_fullStr |
Phase changes of electromagnetic oceanic tidal signals |
title_full_unstemmed |
Phase changes of electromagnetic oceanic tidal signals |
title_sort |
phase changes of electromagnetic oceanic tidal signals |
publishDate |
2020 |
url |
https://gfzpublic.gfz-potsdam.de/pubman/item/item_5001180 https://gfzpublic.gfz-potsdam.de/pubman/item/item_5001180_4/component/file_5001813/5001180.pdf |
geographic |
Arctic Greenland |
geographic_facet |
Arctic Greenland |
genre |
Arctic Greenland |
genre_facet |
Arctic Greenland |
op_source |
Journal of Geophysical Research: Oceans |
op_relation |
info:eu-repo/semantics/altIdentifier/doi/10.1029/2019JC015960 https://gfzpublic.gfz-potsdam.de/pubman/item/item_5001180 https://gfzpublic.gfz-potsdam.de/pubman/item/item_5001180_4/component/file_5001813/5001180.pdf |
op_rights |
info:eu-repo/semantics/openAccess http://creativecommons.org/licenses/by/4.0/ |
op_rightsnorm |
CC-BY |
op_doi |
https://doi.org/10.1029/2019JC015960 |
container_title |
Journal of Geophysical Research: Oceans |
container_volume |
125 |
container_issue |
4 |
_version_ |
1766338249771450368 |