dc.contributor.author
Irrgang, C.
dc.contributor.author
Saynisch, J.
dc.contributor.author
Thomas, M.
dc.date.accessioned
2018-06-08T03:27:28Z
dc.date.available
2016-03-22T12:24:58.218Z
dc.identifier.uri
https://refubium.fu-berlin.de/handle/fub188/15210
dc.identifier.uri
http://dx.doi.org/10.17169/refubium-19398
dc.description.abstract
Abstract. Carrying high concentrations of dissolved salt, ocean water is a
good electrical conductor. As seawater flows through the Earth's ambient
geomagnetic field, electric fields are generated, which in turn induce
secondary magnetic fields. In current models for ocean-induced magnetic
fields, a realistic consideration of seawater conductivity is often neglected
and the effect on the variability of the ocean-induced magnetic field unknown.
To model magnetic fields that are induced by non-tidal global ocean currents,
an electromagnetic induction model is implemented into the Ocean Model for
Circulation and Tides (OMCT). This provides the opportunity to not only model
ocean-induced magnetic signals but also to assess the impact of oceanographic
phenomena on the induction process. In this paper, the sensitivity of the
induction process due to spatial and temporal variations in seawater
conductivity is investigated. It is shown that assuming an ocean-wide uniform
conductivity is insufficient to accurately capture the temporal variability of
the magnetic signal. Using instead a realistic global seawater conductivity
distribution increases the temporal variability of the magnetic field up to 45
%. Especially vertical gradients in seawater conductivity prove to be a key
factor for the variability of the ocean-induced magnetic field. However,
temporal variations of seawater conductivity only marginally affect the
magnetic signal.
en
dc.rights.uri
http://creativecommons.org/licenses/by/3.0/de/
dc.subject.ddc
500 Naturwissenschaften und Mathematik::550 Geowissenschaften, Geologie::551 Geologie, Hydrologie, Meteorologie
dc.title
Impact of variable seawater conductivity on motional induction simulated with
an ocean general circulation model
dc.type
Wissenschaftlicher Artikel
dcterms.bibliographicCitation
Ocean Sci. - 12 (2016), S. 129-136
dcterms.bibliographicCitation.doi
10.5194/os-12-129-2016
dcterms.bibliographicCitation.url
http://www.ocean-sci.net/12/129/2016/
refubium.affiliation
Geowissenschaften
de
refubium.mycore.fudocsId
FUDOCS_document_000000024216
refubium.note.author
Der Artikel wurde in einer Open-Access-Zeitschrift publiziert.
refubium.resourceType.isindependentpub
no
refubium.mycore.derivateId
FUDOCS_derivate_000000006169
dcterms.accessRights.openaire
open access