FRINK Linked Data Fragments server

Matches in SemOpenAlex for { <https://semopenalex.org/work/W2103657497> ?p ?o ?g. }

• W2103657497 endingPage "497" @default.
• W2103657497 startingPage "485" @default.
• W2103657497 abstract "We test inversion methods of geomagnetic secular variation data for the pattern of fluid flow near the surface of the core with synthetic data. These are taken from self-consistent 3-D models of convection-driven magnetohydrodynamic dynamos in rotating spherical shells, which generate dipole-dominated magnetic fields with an Earth-like morphology. We find that the frozen-flux approximation, which is fundamental to all inversion schemes, is satisfied to a fair degree in the models. In order to alleviate the non-uniqueness of the inversion, usually a priori conditions are imposed on the flow; for example, it is required to be purely toroidal or geostrophic. Either condition is nearly satisfied by our model flows near the outer surface. However, most of the surface velocity field lies in the nullspace of the inversion problem. Nonetheless, the a priori constraints reduce the nullspace, and by inverting the magnetic data with either one of them we recover a significant part of the flow. With the geostrophic condition the correlation coefficient between the inverted and the true velocity field can reach values of up to 0.65, depending on the choice of the damping parameter. The correlation is significant at the 95 per cent level for most spherical harmonic degrees up to e=26. However, it degrades substantially, even at long wavelengths, when we truncate the magnetic data sets to e≤14, that is, to the resolution of core-field models. In some of the latter inversions prominent zonal currents, similar to those seen in core-flow models derived from geomagnetic data, occur in the equatorial region. However, the true flow does not contain this flow component. The results suggest that some meaningful information on the core-flow pattern can be retrieved from secular variation data, but also that the limited resolution of the magnetic core field could produce serious artefacts." @default.
• W2103657497 created "2016-06-24" @default.
• W2103657497 creator A5026798985 @default.
• W2103657497 creator A5041297653 @default.
• W2103657497 creator A5073363130 @default.
• W2103657497 creator A5063065426 @default.
• W2103657497 date "2000-05-01" @default.
• W2103657497 modified "2023-10-09" @default.
• W2103657497 title "Core flow inversion tested with numerical dynamo models" @default.
• W2103657497 cites W1603116143 @default.
• W2103657497 cites W1908995290 @default.
• W2103657497 cites W1972245302 @default.
• W2103657497 cites W1988049605 @default.
• W2103657497 cites W1995181040 @default.
• W2103657497 cites W1997086424 @default.
• W2103657497 cites W1997393576 @default.
• W2103657497 cites W1997989802 @default.
• W2103657497 cites W2013050833 @default.
• W2103657497 cites W2013208259 @default.
• W2103657497 cites W2016967331 @default.
• W2103657497 cites W2027183409 @default.
• W2103657497 cites W2030274244 @default.
• W2103657497 cites W2032721372 @default.
• W2103657497 cites W2035743964 @default.
• W2103657497 cites W2051554205 @default.
• W2103657497 cites W2051642836 @default.
• W2103657497 cites W2055116184 @default.
• W2103657497 cites W2056841807 @default.
• W2103657497 cites W2063965548 @default.
• W2103657497 cites W2068029398 @default.
• W2103657497 cites W2082140545 @default.
• W2103657497 cites W2103859659 @default.
• W2103657497 cites W2105952934 @default.
• W2103657497 cites W2111477941 @default.
• W2103657497 cites W2111967849 @default.
• W2103657497 cites W2117617177 @default.
• W2103657497 cites W2126388052 @default.
• W2103657497 cites W2128521752 @default.
• W2103657497 cites W2129886979 @default.
• W2103657497 cites W2151499710 @default.
• W2103657497 cites W2155779883 @default.
• W2103657497 cites W2170154656 @default.
• W2103657497 cites W2313704251 @default.
• W2103657497 doi "https://doi.org/10.1046/j.1365-246x.2000.00097.x" @default.
• W2103657497 hasPublicationYear "2000" @default.
• W2103657497 type Work @default.
• W2103657497 sameAs 2103657497 @default.
• W2103657497 citedByCount "64" @default.
• W2103657497 countsByYear W21036574972012 @default.
• W2103657497 countsByYear W21036574972014 @default.
• W2103657497 countsByYear W21036574972015 @default.
• W2103657497 countsByYear W21036574972017 @default.
• W2103657497 countsByYear W21036574972019 @default.
• W2103657497 countsByYear W21036574972020 @default.
• W2103657497 countsByYear W21036574972023 @default.
• W2103657497 crossrefType "journal-article" @default.
• W2103657497 hasAuthorship W2103657497A5026798985 @default.
• W2103657497 hasAuthorship W2103657497A5041297653 @default.
• W2103657497 hasAuthorship W2103657497A5063065426 @default.
• W2103657497 hasAuthorship W2103657497A5073363130 @default.
• W2103657497 hasBestOaLocation W21036574971 @default.
• W2103657497 hasConcept C105094362 @default.
• W2103657497 hasConcept C109007969 @default.
• W2103657497 hasConcept C115260700 @default.
• W2103657497 hasConcept C121332964 @default.
• W2103657497 hasConcept C127313418 @default.
• W2103657497 hasConcept C13280743 @default.
• W2103657497 hasConcept C133877212 @default.
• W2103657497 hasConcept C134306372 @default.
• W2103657497 hasConcept C135757623 @default.
• W2103657497 hasConcept C151730666 @default.
• W2103657497 hasConcept C1893757 @default.
• W2103657497 hasConcept C199635899 @default.
• W2103657497 hasConcept C33923547 @default.
• W2103657497 hasConcept C3768446 @default.
• W2103657497 hasConcept C57879066 @default.
• W2103657497 hasConcept C62520636 @default.
• W2103657497 hasConcept C8058405 @default.
• W2103657497 hasConceptScore W2103657497C105094362 @default.
• W2103657497 hasConceptScore W2103657497C109007969 @default.
• W2103657497 hasConceptScore W2103657497C115260700 @default.
• W2103657497 hasConceptScore W2103657497C121332964 @default.
• W2103657497 hasConceptScore W2103657497C127313418 @default.
• W2103657497 hasConceptScore W2103657497C13280743 @default.
• W2103657497 hasConceptScore W2103657497C133877212 @default.
• W2103657497 hasConceptScore W2103657497C134306372 @default.
• W2103657497 hasConceptScore W2103657497C135757623 @default.
• W2103657497 hasConceptScore W2103657497C151730666 @default.
• W2103657497 hasConceptScore W2103657497C1893757 @default.
• W2103657497 hasConceptScore W2103657497C199635899 @default.
• W2103657497 hasConceptScore W2103657497C33923547 @default.
• W2103657497 hasConceptScore W2103657497C3768446 @default.
• W2103657497 hasConceptScore W2103657497C57879066 @default.
• W2103657497 hasConceptScore W2103657497C62520636 @default.
• W2103657497 hasConceptScore W2103657497C8058405 @default.
• W2103657497 hasIssue "2" @default.
• W2103657497 hasLocation W21036574971 @default.
• W2103657497 hasOpenAccess W2103657497 @default.

• next