Change search
CiteExportLink to record
Permanent link

Direct link
Cite
Citation style
  • apa
  • ieee
  • modern-language-association-8th-edition
  • vancouver
  • Other style
More styles
Language
  • de-DE
  • en-GB
  • en-US
  • fi-FI
  • nn-NO
  • nn-NB
  • sv-SE
  • Other locale
More languages
Output format
  • html
  • text
  • asciidoc
  • rtf
The Cross-Polar Cap Saturation in GUMICS-4 During High Solar Wind Driving
Aalto Univ, Dept Elect & Nanoengn, Espoo, Finland.ORCID iD: 0000-0002-6688-1010
Aalto Univ, Dept Elect & Nanoengn, Espoo, Finland.ORCID iD: 0000-0002-6317-381X
Uppsala University, Disciplinary Domain of Science and Technology, Physics, Swedish Institute of Space Physics, Uppsala Division.ORCID iD: 0000-0003-1589-6711
Univ Helsinki, Dept Phys, Helsinki, Finland; CNRS, Lab Phys & Chim Environm & Espace, Orleans, France.
Show others and affiliations
2018 (English)In: Journal of Geophysical Research - Space Physics, ISSN 2169-9380, E-ISSN 2169-9402, Vol. 123, no 5, p. 3320-3332Article in journal (Refereed) Published
Abstract [en]

It is well known that the Earth's ionospheric cross‐polar cap potential (CPCP) saturates as a response to the solar wind (SW) driver especially when the level of driving is high and the interplanetary magnetic field is oriented southward. Moreover, previous studies have shown that the upstream Alfvén Mach number may be an important factor in the saturation effect. While the CPCP is often viewed as a measure of the SW‐magnetosphere‐ionosphere coupling, the processes associated with the nonlinearity of the coupling remain an open issue. We use fourth edition of the Grand Unified Magnetosphere‐Ionosphere Coupling Simulation (GUMICS‐4) and artificial SW data to mimic weak and strong driving in order to study the CPCP response to a wide range of interplanetary magnetic field magnitudes (3.5–30 nT) and upstream Alfvén Mach number values (1.2–22). The results provide the first overview of the CPCP saturation in GUMICS‐4 and show that the onset of saturation is strongly dependent on the upstream Alfvén Mach number and the physical processes responsible for the saturation effect might take place both in the Earth's magnetosheath and in the upstream SW.

Place, publisher, year, edition, pages
2018. Vol. 123, no 5, p. 3320-3332
Keywords [en]
GUMICS-4, global MHD, polar cap potential saturation, Alfven Mach number, solar wind-magnetosphere coupling, reconnection
National Category
Fusion, Plasma and Space Physics
Identifiers
URN: urn:nbn:se:uu:diva-358204DOI: 10.1002/2017JA025054ISI: 000435943300007OAI: oai:DiVA.org:uu-358204DiVA, id: diva2:1244280
Funder
Academy of Finland, 310444; 1267087; 288472Available from: 2018-08-31 Created: 2018-08-31 Last updated: 2018-08-31Bibliographically approved

Open Access in DiVA

No full text in DiVA

Other links

Publisher's full text

Search in DiVA

By author/editor
Lakka, A.Pulkkinen, T. I.Dimmock, Andrew P.Honkonen, I.
By organisation
Swedish Institute of Space Physics, Uppsala Division
In the same journal
Journal of Geophysical Research - Space Physics
Fusion, Plasma and Space Physics

Search outside of DiVA

GoogleGoogle Scholar

doi
urn-nbn

Altmetric score

doi
urn-nbn
Total: 5 hits
CiteExportLink to record
Permanent link

Direct link
Cite
Citation style
  • apa
  • ieee
  • modern-language-association-8th-edition
  • vancouver
  • Other style
More styles
Language
  • de-DE
  • en-GB
  • en-US
  • fi-FI
  • nn-NO
  • nn-NB
  • sv-SE
  • Other locale
More languages
Output format
  • html
  • text
  • asciidoc
  • rtf