Do we know the actual magnetopause position for typical solar wind conditions?

Kód výsledku v IS VaVaI

<a href="https://www.isvavai.cz/riv?ss=detail&h=RIV%2F68378289%3A_____%2F16%3A00464314" target="_blank" >RIV/68378289:_____/16:00464314 - isvavai.cz</a>

Nalezeny alternativní kódy

RIV/00216208:11320/16:10334299

Výsledek na webu

<a href="http://dx.doi.org/10.1002/2016JA022471" target="_blank" >http://dx.doi.org/10.1002/2016JA022471</a>

DOI - Digital Object Identifier

<a href="http://dx.doi.org/10.1002/2016JA022471" target="_blank" >10.1002/2016JA022471</a>

Jazyk výsledku

angličtina

Název v původním jazyce

Do we know the actual magnetopause position for typical solar wind conditions?

Popis výsledku v původním jazyce

We compare predicted magnetopause positions at the subsolar point and four reference points in the terminator plane obtained from several empirical and numerical MHD models. Empirical models using various sets of magnetopause crossings and making different assumptions about the magnetopause shape predict significantly different magnetopause positions (with a scatter >1R(E)) even at the subsolar point. Axisymmetric magnetopause models cannot reproduce the cusp indentations or the changes related to the dipole tilt effect, and most of them predict the magnetopause closer to the Earth than nonaxisymmetric models for typical solar wind conditions and zero tilt angle. Predictions of two global nonaxisymmetric models do not match each other, and the models need additional verification. MHD models often predict the magnetopause closer to the Earth than the nonaxisymmetric empirical models, but the predictions of MHD simulations may need corrections for the ring current effect and decreases of the solar wind pressure that occur in the foreshock. Comparing MHD models in which the ring current magnetic field is taken into account with the empirical Lin et al. model, we find that the differences in the reference point positions predicted by these models are relatively small for B-z=0. Therefore, we assume that these predictions indicate the actual magnetopause position, but future investigations are still needed.

Název v anglickém jazyce

Do we know the actual magnetopause position for typical solar wind conditions?

Popis výsledku anglicky

We compare predicted magnetopause positions at the subsolar point and four reference points in the terminator plane obtained from several empirical and numerical MHD models. Empirical models using various sets of magnetopause crossings and making different assumptions about the magnetopause shape predict significantly different magnetopause positions (with a scatter >1R(E)) even at the subsolar point. Axisymmetric magnetopause models cannot reproduce the cusp indentations or the changes related to the dipole tilt effect, and most of them predict the magnetopause closer to the Earth than nonaxisymmetric models for typical solar wind conditions and zero tilt angle. Predictions of two global nonaxisymmetric models do not match each other, and the models need additional verification. MHD models often predict the magnetopause closer to the Earth than the nonaxisymmetric empirical models, but the predictions of MHD simulations may need corrections for the ring current effect and decreases of the solar wind pressure that occur in the foreshock. Comparing MHD models in which the ring current magnetic field is taken into account with the empirical Lin et al. model, we find that the differences in the reference point positions predicted by these models are relatively small for B-z=0. Therefore, we assume that these predictions indicate the actual magnetopause position, but future investigations are still needed.

Druh

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

CEP obor

BL - Fyzika plasmatu a výboje v plynech

OECD FORD obor

—

Projekt

<a href="/cs/project/GA14-19376S" target="_blank" >GA14-19376S: Působení ICMEs a CIRs na zemskou magnetosféru.</a><br>

Návaznosti

I - Institucionalni podpora na dlouhodoby koncepcni rozvoj vyzkumne organizace

Rok uplatnění

2016

Kód důvěrnosti údajů

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

Název periodika

Journal of Geophysical Research: Space Physics

ISSN

2169-9380

e-ISSN

—

Svazek periodika

121

Číslo periodika v rámci svazku

7

Stát vydavatele periodika

US - Spojené státy americké

Počet stran výsledku

16

Strana od-do

6493-6508

Kód UT WoS článku

000383422100032

EID výsledku v databázi Scopus

2-s2.0-84990237916