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Supermagnetosonic subsolar magnetosheath jets and their effects: from the solar wind to the ionospheric convection
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2012 (English)In: Annales Geophysicae, ISSN 0992-7689, E-ISSN 1432-0576, Vol. 30, no 1, 33-48 p.Article in journal (Refereed) Published
Abstract [en]

It has recently been proposed that ripples inherent to the bow shock during radial interplanetary magnetic field (IMF) may produce local high speed flows in the magnetosheath. These jets can have a dynamic pressure much larger than the dynamic pressure of the solar wind. On 17 March 2007, several jets of this type were observed by the Cluster spacecraft. We study in detail these jets and their effects on the magnetopause, the magnetosphere, and the ionospheric convection. We find that (1) the jets could have a scale size of up to a few RE but less than similar to 6 R-E transverse to the XGSE axis; (2) the jets caused significant local magnetopause perturbations due to their high dynamic pressure; (3) during the period when the jets were observed, irregular pulsations at the geostationary orbit and localised flow enhancements in the ionosphere were detected. We suggest that these inner magnetospheric phenomena were caused by the magnetosheath jets.

Place, publisher, year, edition, pages
2012. Vol. 30, no 1, 33-48 p.
Keyword [en]
Interplanetary physics, Planetary bow shocks, Magnetospheric physics, Magnetosheath, Solar wind-magnetosphere interactions
National Category
Geophysics Physical Sciences
URN: urn:nbn:se:uu:diva-169979DOI: 10.5194/angeo-30-33-2012ISI: 000300230100005OAI: oai:DiVA.org:uu-169979DiVA: diva2:508341
Available from: 2012-03-08 Created: 2012-03-07 Last updated: 2012-03-08Bibliographically approved

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Vaivads, Andris
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Swedish Institute of Space Physics, Uppsala Division
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