Solar cycle variations of magnetopause locations

Kód výsledku v IS VaVaI

<a href="https://www.isvavai.cz/riv?ss=detail&h=RIV%2F68378289%3A_____%2F16%3A00462929" target="_blank" >RIV/68378289:_____/16:00462929 - isvavai.cz</a>

Nalezeny alternativní kódy

RIV/00216208:11320/16:10334226

Výsledek na webu

<a href="http://dx.doi.org/10.1016/j.asr.2015.10.012" target="_blank" >http://dx.doi.org/10.1016/j.asr.2015.10.012</a>

DOI - Digital Object Identifier

<a href="http://dx.doi.org/10.1016/j.asr.2015.10.012" target="_blank" >10.1016/j.asr.2015.10.012</a>

Jazyk výsledku

angličtina

Název v původním jazyce

Solar cycle variations of magnetopause locations

Popis výsledku v původním jazyce

The magnetopause location is generally believed to be determined by the solar wind dynamic pressure and by the sign and value of the interplanetary magnetic field vertical (B-z) component. The contribution of other parameters is usually considered to be minor or negligible near the equatorial plane. Recent papers have shown a magnetopause expansion during intervals of a nearly radial IMF but our ability to predict the magnetopause location under steady or slowly changing upstream conditions remains rather weak even if the effect of radial magnetic field is considered. We present a statistical study based on more than 10,000 magnetopause crossings identified in the THEMIS data in the course of the last half of the solar cycle. The observed magnetopause locations are compared with an empirical magnetopause model of Shue et al. (1997) and the sources of differences between observations and model predictions are analyzed. This analysis reveals that the magnetopause location depends on the solar activity being more compressed during the solar maximum. Furthermore, we have found that, beside the solar wind dynamic pressure and vertical magnetic field component, the solar wind speed and ionospheric conductivity (F-10.7 used as a proxy) are important physical quantities controlling this compression. (C) 2016 Published by Elsevier Ltd. on behalf of COSPAR.

Název v anglickém jazyce

Solar cycle variations of magnetopause locations

Popis výsledku anglicky

The magnetopause location is generally believed to be determined by the solar wind dynamic pressure and by the sign and value of the interplanetary magnetic field vertical (B-z) component. The contribution of other parameters is usually considered to be minor or negligible near the equatorial plane. Recent papers have shown a magnetopause expansion during intervals of a nearly radial IMF but our ability to predict the magnetopause location under steady or slowly changing upstream conditions remains rather weak even if the effect of radial magnetic field is considered. We present a statistical study based on more than 10,000 magnetopause crossings identified in the THEMIS data in the course of the last half of the solar cycle. The observed magnetopause locations are compared with an empirical magnetopause model of Shue et al. (1997) and the sources of differences between observations and model predictions are analyzed. This analysis reveals that the magnetopause location depends on the solar activity being more compressed during the solar maximum. Furthermore, we have found that, beside the solar wind dynamic pressure and vertical magnetic field component, the solar wind speed and ionospheric conductivity (F-10.7 used as a proxy) are important physical quantities controlling this compression. (C) 2016 Published by Elsevier Ltd. on behalf of COSPAR.

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

Výsledek vznikl pri realizaci vícero projektů. Více informací v záložce Projekty.

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

Advances in Space Research

ISSN

0273-1177

e-ISSN

—

Svazek periodika

58

Číslo periodika v rámci svazku

2

Stát vydavatele periodika

GB - Spojené království Velké Británie a Severního Irska

Počet stran výsledku

9

Strana od-do

240-248

Kód UT WoS článku

000379367800011

EID výsledku v databázi Scopus

2-s2.0-84971524764