NDLI: Harmonic sources of the main geomagnetic field in the Earth’s core

Content Provider	Springer Nature Link
Author	Starchenko, S. V.
Copyright Year	2011
Abstract	The large-scale harmonic magnetic-convective sources of the main geomagnetic field in the Earth’s core have been determined for the first time. The determination is based on a complete system of eigenfunctions of the magnetic diffusion equation in a homogeneously conducting sphere, which is surrounded by an insulator. The sources of the main geomagnetic field observed, which is responsible for the distribution of the electric currents generating this field in the core, are expressed in terms of large-scale eigenfunctions. In this case, the dipole sources are directly related to the observed geomagnetic dipole, whereas the quadrupole sources are related to the quadrupole, etc. The time variations in the obtained sources are responsible for individual spatiotemporal features in the generation or suppression of each Gaussian component of the observed geomagnetic field. When the commonly accepted observational international geomagnetic reference field (IGRF) models were used to partially reveal these time variations, it became possible to specify the estimate of the Earth’s core conductivity and determine the minimum period that can separate us from the commencement of further inversion or excursion.
Starting Page	409
Ending Page	414
Page Count	6
File Format	PDF
ISSN	00167932
Journal	Geomagnetism and Aeronomy
Volume Number	51
Issue Number	3
e-ISSN	1555645X
Language	English
Publisher	SP MAIK Nauka/Interperiodica
Publisher Date	2011-06-08
Publisher Place	Dordrecht
Access Restriction	One Nation One Subscription (ONOS)
Subject Keyword	Geophysics/Geodesy
Content Type	Text
Resource Type	Article
Subject	Geophysics Space and Planetary Science

Sl.	Authority	Responsibilities	Communication Details
1	Ministry of Education (GoI), Department of Higher Education	Sanctioning Authority	https://www.education.gov.in/ict-initiatives
2	Indian Institute of Technology Kharagpur	Host Institute of the Project: The host institute of the project is responsible for providing infrastructure support and hosting the project	https://www.iitkgp.ac.in
3	National Digital Library of India Office, Indian Institute of Technology Kharagpur	The administrative and infrastructural headquarters of the project	Dr. B. Sutradhar bsutra@ndl.gov.in
4	Project PI / Joint PI	Principal Investigator and Joint Principal Investigators of the project	Dr. B. Sutradhar bsutra@ndl.gov.in Prof. Saswat Chakrabarti will be added soon
5	Website/Portal (Helpdesk)	Queries regarding NDLI and its services	support@ndl.gov.in
6	Contents and Copyright Issues	Queries related to content curation and copyright issues	content@ndl.gov.in
7	National Digital Library of India Club (NDLI Club)	Queries related to NDLI Club formation, support, user awareness program, seminar/symposium, collaboration, social media, promotion, and outreach	clubsupport@ndl.gov.in
8	Digital Preservation Centre (DPC)	Assistance with digitizing and archiving copyright-free printed books	dpc@ndl.gov.in
9	IDR Setup or Support	Queries related to establishment and support of Institutional Digital Repository (IDR) and IDR workshops	idr@ndl.gov.in

Topographic heterogeneity of the core-mantle boundary in subduction zones and its effect on kinematics of main geomagnetic field sources

Secular variations in the main geomagnetic field within the scope of the dynamic model of field sources

Magnetorotational instability in the Earth’s core

Global anomalies of the main geomagnetic field and the dynamic model of their sources

Variations in the quasi-static electric field in the near-Earth’s atmosphere during geomagnetic storms in November 2004

On the minimal instability time of hydromagnetic flows in the Earth’s core

Synchronism of variations in the main geomagnetic field and earth rotation velocity fluctuations

Correlation properties of a forecast of secular variation in the main geomagnetic field

Observational estimate of magnetic field and geodynamo parameters under the surface of the Earth’s core

Harmonic sources of the main geomagnetic field in the Earth’s core

Similar Documents

Topographic heterogeneity of the core-mantle boundary in subduction zones and its effect on kinematics of main geomagnetic field sources

Secular variations in the main geomagnetic field within the scope of the dynamic model of field sources

Magnetorotational instability in the Earth’s core

Global anomalies of the main geomagnetic field and the dynamic model of their sources

Variations in the quasi-static electric field in the near-Earth’s atmosphere during geomagnetic storms in November 2004

On the minimal instability time of hydromagnetic flows in the Earth’s core

Synchronism of variations in the main geomagnetic field and earth rotation velocity fluctuations

Correlation properties of a forecast of secular variation in the main geomagnetic field

Observational estimate of magnetic field and geodynamo parameters under the surface of the Earth’s core

Harmonic sources of the main geomagnetic field in the Earth’s core