Learning Centre

A statistical study of magnetic field fluctuations in the dayside magnetosheath and their dependence on upstream solar wind conditions

 |  Login

Show simple item record

dc.contributor Aalto-yliopisto fi
dc.contributor Aalto University en
dc.contributor.author Dimmock, Andrew P.
dc.contributor.author Nykyri, Katariina
dc.contributor.author Pulkkinen, Tuija I.
dc.date.accessioned 2015-03-30T09:00:29Z
dc.date.available 2015-03-30T09:00:29Z
dc.date.issued 2014
dc.identifier.citation Dimmock, Andrew P. & Nykyri, Katariina & Pulkkinen, Tuija I. 2014. A statistical study of magnetic field fluctuations in the dayside magnetosheath and their dependence on upstream solar wind conditions. Journal of Geophysical Research: Space physics, Vol. 119, nro 8. P. 6231-6248. ISSN 2169-9402 (electronic). ISSN 2169-9380 (printed). DOI: 10.1002/2014JA020009. en
dc.identifier.issn 2169-9402 (electronic)
dc.identifier.issn 2169-9380 (printed)
dc.identifier.uri https://aaltodoc.aalto.fi/handle/123456789/15433
dc.description.abstract The magnetosheath functions as a natural interface connecting the interplanetary and magnetospheric plasma. Since the magnetosheath houses the shocked solar wind, it is populated with abundant magnetic field turbulence which are generated both locally and externally. Although the steady state magnetosheath is to date relatively well understood, the same cannot be said of transient magnetic perturbations due to their kinetic nature and often complex and numerous generation mechanisms. The current manuscript presents a statistical study of magnetic field fluctuations in the dayside magnetosheath as a function of upstream solar wind conditions. We concentrate on the ambient higher-frequency fluctuations in the range of 0.1 Hz -> 2 Hz. We show evidence that the dawn (quasi-parallel) flank is visibly prone to higher-amplitude magnetic perturbations compared to the dusk (quasi-perpendicular) region. Our statistical data also suggest that the magnitude of turbulence can be visibly enhanced close to the magnetopause during periods of southward interplanetary magnetic field orientations. Faster (> 400 km s−1) solar wind velocities also appear to drive higher-amplitude perturbations compared to slower speeds. The spatial distribution also suggests some dependence on the magnetic pileup region at the subsolar magnetopause. en
dc.format.extent 6231-6248
dc.format.mimetype application/pdf en
dc.language.iso en en
dc.publisher American Geophysical Union. Wiley en
dc.relation.ispartofseries Journal of Geophysical Research: Space physics, Vol. 119, nro 8 en
dc.subject.other Space technology en
dc.title A statistical study of magnetic field fluctuations in the dayside magnetosheath and their dependence on upstream solar wind conditions en
dc.type A1 Alkuperäisartikkeli tieteellisessä aikakauslehdessä fi
dc.description.version Peer reviewed en
dc.rights.holder American Geophysical Union. Wiley
dc.contributor.school Sähkötekniikan korkeakoulu fi
dc.contributor.school School of Electrical Engineering en
dc.subject.keyword magnetosheath en
dc.subject.keyword turbulence en
dc.subject.keyword magnetic fluctuations en
dc.subject.keyword bow shock en
dc.subject.keyword magnetopause en
dc.identifier.urn URN:NBN:fi:aalto-201503252088
dc.type.dcmitype text en
dc.identifier.doi 10.1002/2014JA020009
dc.type.version Final published version en


Files in this item

This item appears in the following Collection(s)

Show simple item record

Search archive


Advanced Search

article-iconSubmit a publication

Browse