Auroral electrojets during deep solar minimum at the end of solar cycle 23

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dc.contributor Aalto-yliopisto fi
dc.contributor Aalto University en
dc.contributor.author Pulkkinen, Tuija I.
dc.contributor.author Tanskanen, E. I.
dc.contributor.author Viljanen, A.
dc.contributor.author Partamies, N.
dc.contributor.author Kauristie, K.
dc.date.accessioned 2015-03-30T09:01:12Z
dc.date.available 2015-03-30T09:01:12Z
dc.date.issued 2011
dc.identifier.citation Pulkkinen, Tuija I. & Tanskanen, E. I. & Viljanen, A. & Partamies, N. & Kauristie, K. 2011. Auroral electrojets during deep solar minimum at the end of solar cycle 23. Journal of Geophysical Research: Space physics, Vol. 116, nro A04207. ISSN 0148-0227 (printed). DOI: 10.1029/2010JA016098. en
dc.identifier.issn 0148-0227 (printed)
dc.identifier.uri https://aaltodoc.aalto.fi/handle/123456789/15444
dc.description.abstract We investigate the auroral electrojet activity during the deep minimum at the end of solar cycle 23 (2008–2009) by comparing data from the IMAGE magnetometer chain, auroral observations in Fennoscandia and Svalbard, and solar wind and interplanetary magnetic field (IMF) observations from the OMNI database from that period with those recorded one solar cycle earlier. We examine the eastward and westward electrojets and the midnight sector separately. The electrojets during 2008–2009 were found to be weaker and at more poleward latitudes than during other times, but when similar driving solar wind and IMF conditions are compared, the behavior in the morning and evening sectors during 2008–2009 was similar to other periods. On the other hand, the midnight sector shows distinct behavior during 2008–2009: for similar driving conditions, the electrojets resided at further poleward latitudes and on average were weaker than during other periods. Furthermore, the substorm occurrence frequency seemed to saturate to a minimum level for very low levels of driving during 2009. This analysis suggests that the solar wind coupling to the ionosphere during 2008–2009 was similar to other periods but that the magnetosphere-ionosphere coupling has features that are unique to this period of very low solar activity. en
dc.format.extent 10
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. 116, nro A04207 en
dc.subject.other Space technology en
dc.title Auroral electrojets during deep solar minimum at the end of solar cycle 23 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 auroral electrojet en
dc.subject.keyword magnetometer chain en
dc.subject.keyword solar cycle en
dc.subject.keyword solar wind-magnetosphere interaction en
dc.identifier.urn URN:NBN:fi:aalto-201503262103
dc.type.dcmitype text en
dc.identifier.doi 10.1029/2010JA016098
dc.type.version Final published version en


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