Polarity reversals in dependence on the Prandtl number and density stratification

Kód výsledku v IS VaVaI

<a href="https://www.isvavai.cz/riv?ss=detail&h=RIV%2F67985530%3A_____%2F15%3A00440702" target="_blank" >RIV/67985530:_____/15:00440702 - isvavai.cz</a>

Výsledek na webu

<a href="http://dx.doi.org/10.1007/s11200-014-0724-6" target="_blank" >http://dx.doi.org/10.1007/s11200-014-0724-6</a>

DOI - Digital Object Identifier

<a href="http://dx.doi.org/10.1007/s11200-014-0724-6" target="_blank" >10.1007/s11200-014-0724-6</a>

Jazyk výsledku

angličtina

Název v původním jazyce

Polarity reversals in dependence on the Prandtl number and density stratification

Popis výsledku v původním jazyce

Dependence of polarity reversals on the Prandtl number and density stratification using the MAG dynamo code was investigated. The magnetic field is dipole-dominated in the stable polarity state and during the reversals it is multipolar. Quadrupole and octupole components of magnetic fields are stronger at the Prandtl number equal to 0.2 than at the Prandtl number equal to 1. Polarity reversals occur at higher values of the Rayleigh number, while at its lower values the magnetic field does not undergo reversals. The situation is the same with the magnetic Prandtl number: polarity reversals occur at higher values of the magnetic Prandtl number, while at its lower values the magnetic field does not undergo reversals (neither if the magnetic field becomesweak in the polar regions nor if it is strong). During the 1000 simulated time units two reversals occur in the case of uniform stratification and at both investigated values of the Prandtl number, while in the case of non-uniform stratif

Název v anglickém jazyce

Polarity reversals in dependence on the Prandtl number and density stratification

Popis výsledku anglicky

Dependence of polarity reversals on the Prandtl number and density stratification using the MAG dynamo code was investigated. The magnetic field is dipole-dominated in the stable polarity state and during the reversals it is multipolar. Quadrupole and octupole components of magnetic fields are stronger at the Prandtl number equal to 0.2 than at the Prandtl number equal to 1. Polarity reversals occur at higher values of the Rayleigh number, while at its lower values the magnetic field does not undergo reversals. The situation is the same with the magnetic Prandtl number: polarity reversals occur at higher values of the magnetic Prandtl number, while at its lower values the magnetic field does not undergo reversals (neither if the magnetic field becomesweak in the polar regions nor if it is strong). During the 1000 simulated time units two reversals occur in the case of uniform stratification and at both investigated values of the Prandtl number, while in the case of non-uniform stratif

Druh

J_x - Nezařazeno - Článek v odborném periodiku (Jimp, Jsc a Jost)

CEP obor

DE - Zemský magnetismus, geodesie, geografie

OECD FORD obor

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Projekt

<a href="/cs/project/LG13042" target="_blank" >LG13042: Podpora účasti v řídících strukturách Mezinárodní asociace pro geomagnetizmus a aeronomii (IAGA)</a><br>

Návaznosti

I - Institucionalni podpora na dlouhodoby koncepcni rozvoj vyzkumne organizace

Rok uplatnění

2015

Kód důvěrnosti údajů

S - Úplné a pravdivé údaje o projektu nepodléhají ochraně podle zvláštních právních předpisů

Název periodika

Studia geophysica et geodaetica

ISSN

0039-3169

e-ISSN

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Svazek periodika

59

Číslo periodika v rámci svazku

1

Stát vydavatele periodika

CZ - Česká republika

Počet stran výsledku

22

Strana od-do

137-158

Kód UT WoS článku

000349607000008

EID výsledku v databázi Scopus

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