Show simple item record

Satellite monitoring of long period ocean-induced magnetic field variations

dc.contributor.authorFinlay, Christopher C.
dc.contributor.authorVelímský, Jakub
dc.contributor.authorKloss, Clemens
dc.contributor.authorBlangsboll, Rasmus M.
dc.date.accessioned2025-01-16T13:41:00Z
dc.date.available2025-01-16T13:41:00Z
dc.date.issued2024
dc.identifier.urihttps://hdl.handle.net/20.500.14178/2816
dc.description.abstractSatellite magnetic field observations have the potential to provide valuable information on dynamics, heat content and salinity throughout the ocean. Here, we present the expected spatio-temporal characteristics of the ocean-induced magnetic field (OIMF) at satellite altitude on periods of months to decades. We compare these to the characteristics of other sources of Earth's magnetic field, and discuss whether it is feasible for the OIMF to be retrieved and routinely monitored from space. We focus on large length scales (spherical harmonic degrees up to 30) and periods from one month up to 5 years. To characterize the expected ocean signal, we make use of advanced numerical simulations taking high-resolution oceanographic inputs and solve the magnetic induction equation in three dimensions, including galvanic coupling and self-induction effects. We find the time-varying ocean-induced signal dominates over the primary source of the internal field, the core dynamo, at high spherical harmonic degree with the cross-over taking place at degrees 13-19 depending on the considered period. The ionospheric and magnetospheric fields (including their Earth-induced counterparts) have most power on periods shorter than one month and are expected to be mostly zonal in magnetic coordinates at satellite altitude. Based on these findings, we discuss future prospects for isolating and monitoring long period OIMF variations using data collected by present and upcoming magnetic survey satellites.This article is part of the theme issue 'Magnetometric remote sensing of Earth and planetary oceans'.en
dc.language.isoen
dc.relation.urlhttps://doi.org/10.1098/rsta.2024.0077
dc.rightsCreative Commons Uveďte původ 4.0 Internationalcs
dc.rightsCreative Commons Attribution 4.0 Internationalen
dc.titleSatellite monitoring of long period ocean-induced magnetic field variationsen
dcterms.accessRightsopenAccess
dcterms.licensehttps://creativecommons.org/licenses/by/4.0/legalcode
dc.date.updated2025-01-16T13:41:00Z
dc.subject.keywordgeomagnetismen
dc.subject.keywordocean dynamicsen
dc.subject.keywordremote sensingen
dc.subject.keyworden
dc.identifier.eissn1471-2962
dc.relation.fundingReferenceinfo:eu-repo/grantAgreement/UK/COOP/COOP
dc.date.embargoStartDate2025-01-16
dc.type.obd73
dc.type.versioninfo:eu-repo/semantics/publishedVersion
dc.identifier.doi10.1098/rsta.2024.0077
dc.identifier.utWos001369289800005
dc.identifier.eidScopus2-s2.0-85210973016
dc.identifier.obd657579
dc.identifier.pubmed39617037
dc.subject.rivPrimary10000::10500
dcterms.isPartOf.namePhilosophical Transactions of the Royal Society A: Mathematical, Physical and Engineering Sciences
dcterms.isPartOf.issn1364-503X
dcterms.isPartOf.journalYear2024
dcterms.isPartOf.journalVolume382
dcterms.isPartOf.journalIssue2286
uk.faculty.primaryId116
uk.faculty.primaryNameMatematicko-fyzikální fakultacs
uk.faculty.primaryNameFaculty of Mathematics and Physicsen
uk.department.primaryId1276
uk.department.primaryNameKatedra geofyzikycs
uk.department.primaryNameDepartment of Geophysicsen
dc.type.obdHierarchyCsČLÁNEK V ČASOPISU::článek v časopisu::původní článekcs
dc.type.obdHierarchyEnJOURNAL ARTICLE::journal article::original articleen
dc.type.obdHierarchyCode73::152::206en
uk.displayTitleSatellite monitoring of long period ocean-induced magnetic field variationsen


Files in this item

Thumbnail

This item appears in the following Collection(s)

Show simple item record