On the Use of Satellite Altimetry to Detect Ocean Circulation's Magnetic Signals
Oceanic magnetic signals are sensitive to ocean velocity, salinity, and heat content. The detection of respective signals with global satellite magnetometers would pose a very valuable source of information. While tidal magnetic fields are already detected, electromagnetic signals of the ocean circu...
Published in: | Journal of Geophysical Research: Oceans |
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2018
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ftgfzpotsdam:oai:gfzpublic.gfz-potsdam.de:item_3120889 2023-05-15T13:52:13+02:00 On the Use of Satellite Altimetry to Detect Ocean Circulation's Magnetic Signals Saynisch, J. Irrgang, C. Thomas, M. 2018 application/pdf https://gfzpublic.gfz-potsdam.de/pubman/item/item_3120889 https://gfzpublic.gfz-potsdam.de/pubman/item/item_3120889_4/component/file_3204889/3120889.pdf unknown info:eu-repo/semantics/altIdentifier/doi/10.1002/2017JC013742 info:eu-repo/semantics/altIdentifier/urn/http://doi.crossref.org/servlet/query?format=unixref&pid=bib@gfz-potsdam.de&id=10.1002/2017JC013742 https://gfzpublic.gfz-potsdam.de/pubman/item/item_3120889 https://gfzpublic.gfz-potsdam.de/pubman/item/item_3120889_4/component/file_3204889/3120889.pdf info:eu-repo/semantics/openAccess Journal of Geophysical Research info:eu-repo/semantics/article 2018 ftgfzpotsdam https://doi.org/10.1002/2017JC013742 2022-09-14T05:55:59Z Oceanic magnetic signals are sensitive to ocean velocity, salinity, and heat content. The detection of respective signals with global satellite magnetometers would pose a very valuable source of information. While tidal magnetic fields are already detected, electromagnetic signals of the ocean circulation still remain unobserved from space. We propose to use satellite altimetry to construct proxy magnetic signals of the ocean circulation. These proxy time series could subsequently be fitted to satellite magnetometer data. The fitted data could be removed from the observations or the fitting constants could be analyzed for physical properties of the ocean, e.g., the heat budget. To test and evaluate this approach, synthetic true and proxy magnetic signals are derived from a global circulation model of the ocean. Both data sets are compared in dependence of location and time scale. We study and report when and where the proxy data describe the true signal sufficiently well. Correlations above 0.6 and explained variances of above 80% can be reported for large parts of the Antarctic ocean, thus explaining the major part of the global, sub‐seasonal magnetic signal. Article in Journal/Newspaper Antarc* Antarctic Antarctic Ocean GFZpublic (German Research Centre for Geosciences, Helmholtz-Zentrum Potsdam) Antarctic The Antarctic Antarctic Ocean Journal of Geophysical Research: Oceans 123 3 2305 2314 |
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Open Polar |
collection |
GFZpublic (German Research Centre for Geosciences, Helmholtz-Zentrum Potsdam) |
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ftgfzpotsdam |
language |
unknown |
description |
Oceanic magnetic signals are sensitive to ocean velocity, salinity, and heat content. The detection of respective signals with global satellite magnetometers would pose a very valuable source of information. While tidal magnetic fields are already detected, electromagnetic signals of the ocean circulation still remain unobserved from space. We propose to use satellite altimetry to construct proxy magnetic signals of the ocean circulation. These proxy time series could subsequently be fitted to satellite magnetometer data. The fitted data could be removed from the observations or the fitting constants could be analyzed for physical properties of the ocean, e.g., the heat budget. To test and evaluate this approach, synthetic true and proxy magnetic signals are derived from a global circulation model of the ocean. Both data sets are compared in dependence of location and time scale. We study and report when and where the proxy data describe the true signal sufficiently well. Correlations above 0.6 and explained variances of above 80% can be reported for large parts of the Antarctic ocean, thus explaining the major part of the global, sub‐seasonal magnetic signal. |
format |
Article in Journal/Newspaper |
author |
Saynisch, J. Irrgang, C. Thomas, M. |
spellingShingle |
Saynisch, J. Irrgang, C. Thomas, M. On the Use of Satellite Altimetry to Detect Ocean Circulation's Magnetic Signals |
author_facet |
Saynisch, J. Irrgang, C. Thomas, M. |
author_sort |
Saynisch, J. |
title |
On the Use of Satellite Altimetry to Detect Ocean Circulation's Magnetic Signals |
title_short |
On the Use of Satellite Altimetry to Detect Ocean Circulation's Magnetic Signals |
title_full |
On the Use of Satellite Altimetry to Detect Ocean Circulation's Magnetic Signals |
title_fullStr |
On the Use of Satellite Altimetry to Detect Ocean Circulation's Magnetic Signals |
title_full_unstemmed |
On the Use of Satellite Altimetry to Detect Ocean Circulation's Magnetic Signals |
title_sort |
on the use of satellite altimetry to detect ocean circulation's magnetic signals |
publishDate |
2018 |
url |
https://gfzpublic.gfz-potsdam.de/pubman/item/item_3120889 https://gfzpublic.gfz-potsdam.de/pubman/item/item_3120889_4/component/file_3204889/3120889.pdf |
geographic |
Antarctic The Antarctic Antarctic Ocean |
geographic_facet |
Antarctic The Antarctic Antarctic Ocean |
genre |
Antarc* Antarctic Antarctic Ocean |
genre_facet |
Antarc* Antarctic Antarctic Ocean |
op_source |
Journal of Geophysical Research |
op_relation |
info:eu-repo/semantics/altIdentifier/doi/10.1002/2017JC013742 info:eu-repo/semantics/altIdentifier/urn/http://doi.crossref.org/servlet/query?format=unixref&pid=bib@gfz-potsdam.de&id=10.1002/2017JC013742 https://gfzpublic.gfz-potsdam.de/pubman/item/item_3120889 https://gfzpublic.gfz-potsdam.de/pubman/item/item_3120889_4/component/file_3204889/3120889.pdf |
op_rights |
info:eu-repo/semantics/openAccess |
op_doi |
https://doi.org/10.1002/2017JC013742 |
container_title |
Journal of Geophysical Research: Oceans |
container_volume |
123 |
container_issue |
3 |
container_start_page |
2305 |
op_container_end_page |
2314 |
_version_ |
1766256484203626496 |