The Cluster spacecrafts' view of the motion of the high-latitude magnetopause

Result code in IS VaVaI

<a href="https://www.isvavai.cz/riv?ss=detail&h=RIV%2F68378289%3A_____%2F24%3A00597957" target="_blank" >RIV/68378289:_____/24:00597957 - isvavai.cz</a>

Result on the web

<a href="https://angeo.copernicus.org/articles/42/371/2024/" target="_blank" >https://angeo.copernicus.org/articles/42/371/2024/</a>

DOI - Digital Object Identifier

<a href="http://dx.doi.org/10.5194/angeo-42-371-2024" target="_blank" >10.5194/angeo-42-371-2024</a>

Result language

angličtina

Original language name

The Cluster spacecrafts' view of the motion of the high-latitude magnetopause

Original language description

The magnetopause is the boundary between the interplanetary magnetic field and the terrestrial magnetic field. It is influenced by different solar-wind conditions, which lead to a change in the shape and location of the magnetopause. The interaction between the solar wind and the magnetosphere can be studied from in situ spacecraft observations. Many studies focus on the equatorial plane as this is where recent spacecraft constellations such as THEMIS or MMS operate. However, to fully capture the interaction, it is important to study the high-latitude regions as well. Since the Cluster spacecraft operate in a highly elliptical polar orbit, the spacecraft often pass through the magnetopause at high latitudes. This allows us to collect a dataset of high-latitude magnetopause crossings and to study magnetopause motion in this region, as well as deviations from established magnetopause models. We use multi-spacecraft analysis tools to investigate the direction of the magnetopause motion in the high latitudes and to compare the occurrence of crossings at different locations with the result in the equatorial plane. We find that the high-latitude magnetopause motion is generally consistent with previously reported values and seems to be more often associated with a closed magnetopause boundary. We show that, on average, the magnetopause moves faster inwards than outwards. Furthermore, the occurrence of magnetopause positions beyond those predicted by the model at high latitudes is found to be caused by the solar-wind parameters that are similar to those in the equatorial plane. Finally, we highlight the importance of the dipole tilt angle at high latitudes. Our results may be useful for the interpretation of plasma measurements from the upcoming SMILE mission as this spacecraft will also fly frequently through the high-latitude magnetopause.

Czech name

—

Czech description

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Type

J_imp - Article in a specialist periodical, which is included in the Web of Science database

CEP classification

—

OECD FORD branch

10305 - Fluids and plasma physics (including surface physics)

Project

—

Continuities

I - Institucionalni podpora na dlouhodoby koncepcni rozvoj vyzkumne organizace

Publication year

2024

Confidentiality

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

Name of the periodical

Annales Geophysicae

ISSN

0992-7689

e-ISSN

1432-0576

Volume of the periodical

42

Issue of the periodical within the volume

2

Country of publishing house

DE - GERMANY

Number of pages

24

Pages from-to

371-394

UT code for WoS article

001310262600001

EID of the result in the Scopus database

2-s2.0-85204234598