Magnetic fields generated by internal ocean seawater motion
This thesis models induced magnetic fields from the motion of seawater in the Earth's magnetic field analytically and compares the results to arctic on-the-ice magnetic fluctuation measurements. The oceans have various types of internal motions, such as internal waves and turbulence. This motio...
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Monterey, California. Naval Postgraduate School
1991
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ftnavalpschool:oai:calhoun.nps.edu:10945/28337 2024-06-09T07:43:32+00:00 Magnetic fields generated by internal ocean seawater motion Davis, Charles A. Walters, Donald Naval Postgraduate School Physics Gnanalingam, S. 1991-12 71 p.;28 cm. application/pdf https://hdl.handle.net/10945/28337 en_US eng Monterey, California. Naval Postgraduate School https://hdl.handle.net/10945/28337 Induced magnetic fields Magnetic anomaly detection Internal Waves Boundary layer turbulence Thesis 1991 ftnavalpschool 2024-05-15T00:46:20Z This thesis models induced magnetic fields from the motion of seawater in the Earth's magnetic field analytically and compares the results to arctic on-the-ice magnetic fluctuation measurements. The oceans have various types of internal motions, such as internal waves and turbulence. This motion of sea water, which is a conductor, in the earth's magnetic field induces a current density. The current density, in turn, induces its own magnetic field. This thesis models internal waves and upper layer ocean turbulence analytically. The corresponding induced magnetic fields are calculated using a static form of Maxwell's equations and parameters for the Arctic are inserted. comparisons are made with measurements from the Arctic Internal Wave Experiment (1985). The predicted fields from internal waves have magnitudes that are measureable and of the same order of magnitude as ionospherically generated fields, The predicted fields from turbulence are several orders of magnitude smaller than ionospherically generated fields. Besides giving information about internal motions in the ocean, the seawater induced fields are a noise source in magnetic anomaly detection Approved for public release; distribution is unlimited. Lieutenant, United States Navy http://archive.org/details/magneticfieldsge1094528337 Thesis Arctic Naval Postgraduate School: Calhoun Arctic |
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Open Polar |
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Naval Postgraduate School: Calhoun |
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ftnavalpschool |
language |
English |
topic |
Induced magnetic fields Magnetic anomaly detection Internal Waves Boundary layer turbulence |
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Induced magnetic fields Magnetic anomaly detection Internal Waves Boundary layer turbulence Davis, Charles A. Magnetic fields generated by internal ocean seawater motion |
topic_facet |
Induced magnetic fields Magnetic anomaly detection Internal Waves Boundary layer turbulence |
description |
This thesis models induced magnetic fields from the motion of seawater in the Earth's magnetic field analytically and compares the results to arctic on-the-ice magnetic fluctuation measurements. The oceans have various types of internal motions, such as internal waves and turbulence. This motion of sea water, which is a conductor, in the earth's magnetic field induces a current density. The current density, in turn, induces its own magnetic field. This thesis models internal waves and upper layer ocean turbulence analytically. The corresponding induced magnetic fields are calculated using a static form of Maxwell's equations and parameters for the Arctic are inserted. comparisons are made with measurements from the Arctic Internal Wave Experiment (1985). The predicted fields from internal waves have magnitudes that are measureable and of the same order of magnitude as ionospherically generated fields, The predicted fields from turbulence are several orders of magnitude smaller than ionospherically generated fields. Besides giving information about internal motions in the ocean, the seawater induced fields are a noise source in magnetic anomaly detection Approved for public release; distribution is unlimited. Lieutenant, United States Navy http://archive.org/details/magneticfieldsge1094528337 |
author2 |
Walters, Donald Naval Postgraduate School Physics Gnanalingam, S. |
format |
Thesis |
author |
Davis, Charles A. |
author_facet |
Davis, Charles A. |
author_sort |
Davis, Charles A. |
title |
Magnetic fields generated by internal ocean seawater motion |
title_short |
Magnetic fields generated by internal ocean seawater motion |
title_full |
Magnetic fields generated by internal ocean seawater motion |
title_fullStr |
Magnetic fields generated by internal ocean seawater motion |
title_full_unstemmed |
Magnetic fields generated by internal ocean seawater motion |
title_sort |
magnetic fields generated by internal ocean seawater motion |
publisher |
Monterey, California. Naval Postgraduate School |
publishDate |
1991 |
url |
https://hdl.handle.net/10945/28337 |
geographic |
Arctic |
geographic_facet |
Arctic |
genre |
Arctic |
genre_facet |
Arctic |
op_relation |
https://hdl.handle.net/10945/28337 |
_version_ |
1801372354278850560 |