Umeå University's logo

umu.sePublications
EnglishSvenskaNorsk
Change search
ExportLink to record
Permanent link

Direct link
BETA

Project

Project type/Form of grant
Project grant
Title [sv]
Geoeffektivitet orsakad av bogchocksprocesser
Title [en]
Geoeffectiveness of bow shock processes
Abstract [en]
The solar wind brings much energy and mass through the solar system, but Earth is partly shielded by two thin boundaries and current sheets. The bow shock is the outermost. It has long been considered to be quite passive, mostly slowing down the wind. However, recent studies show that it can have a far more important role, with bow shock processes causing geoeffective responses (geomagnetic disturbances). To better predict the space weather to protect our technological society, improved knowledge about the entire bowshock-magnetosphere-ionosphere (BMI) system is needed. We will use data from several space- and ground-based observatories to elucidate the role of the bow shock concerning two important aspects: (1) The geoeffectiveness of magnetosheath jets (localized dynamic pressure enhancements) generated at the shock, impacting the magnetopause and causing ionospheric disturbances. (2) The bow shock current closure to the magnetosphere and generator-load role for the system. Previous jet studies have mainly focused on a few selected cases but we will correlate numerous jet observations with responses in the polar regions. Our team was first to observationally verify the current closure for quasi-perpendicular shocks. Now we will extend our studies to the more complicated quasi-parallel ones. Our results will help understanding shocks at other planets and comets, and help answering what is the current closure for astrophysical shocks and where is the energy dissipated.
Principal InvestigatorHamrin, Maria
Coordinating organisation
Umeå University
Funder
Period
2019-01-01 － 2022-12-31
National Category
Fusion, Plasma and Space Physics
Identifiers
DiVA, id: project:1598Project, id: 2018-03623_VR

Search in DiVA

Fusion, Plasma and Space Physics

Search outside of DiVA

GoogleGoogle Scholar
v. 2.47.0
|
WCAG
|
Umeå University Library
|
Register in DiVA
|
Support
|
Search DiVA Portal