The Cross-Polar Cap Saturation in GUMICS-4 During High Solar Wind Driving

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dc.contributor Aalto-yliopisto fi
dc.contributor Aalto University en Lakka, A. Pulkkinen, T. I. Dimmock, A. P. Myllys, M. Honkonen, I. Palmroth, M. 2018-06-18T09:21:16Z 2018-06-18T09:21:16Z 2018-05
dc.identifier.citation Lakka , A , Pulkkinen , T I , Dimmock , A P , Myllys , M , Honkonen , I & Palmroth , M 2018 , ' The Cross-Polar Cap Saturation in GUMICS-4 During High Solar Wind Driving ' Journal of Geophysical Research: Space Physics . DOI: 10.1002/2017JA025054 en
dc.identifier.issn 2169-9380
dc.identifier.issn 2169-8996
dc.identifier.other PURE UUID: c249a348-3b4e-41cc-ad6c-852c1d82752b
dc.identifier.other PURE ITEMURL:
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dc.description.abstract 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. en
dc.format.extent 13
dc.format.mimetype application/pdf
dc.language.iso en en
dc.relation.ispartofseries Journal of Geophysical Research: Space Physics en
dc.rights openAccess en
dc.subject.other Geophysics en
dc.subject.other Forestry en
dc.subject.other Oceanography en
dc.subject.other Aquatic Science en
dc.subject.other Ecology en
dc.subject.other Water Science and Technology en
dc.subject.other Soil Science en
dc.subject.other Geochemistry and Petrology en
dc.subject.other Earth-Surface Processes en
dc.subject.other Atmospheric Science en
dc.subject.other Earth and Planetary Sciences (miscellaneous) en
dc.subject.other Space and Planetary Science en
dc.subject.other Palaeontology en
dc.subject.other 1171 Geosciences en
dc.title The Cross-Polar Cap Saturation in GUMICS-4 During High Solar Wind Driving en
dc.type A1 Alkuperäisartikkeli tieteellisessä aikakauslehdessä fi
dc.description.version Peer reviewed en
dc.contributor.department Department of Electronics and Nanoengineering
dc.contributor.department Uppsala University
dc.contributor.department CNRS Centre National de la Recherche Scientifique
dc.contributor.department Finnish Meteorological Institute
dc.contributor.department University of Helsinki
dc.subject.keyword Alfvén Mach number
dc.subject.keyword Global MHD
dc.subject.keyword GUMICS-4
dc.subject.keyword Polar cap potential saturation
dc.subject.keyword Reconnection
dc.subject.keyword Solar wind-magnetosphere coupling
dc.subject.keyword Geophysics
dc.subject.keyword Forestry
dc.subject.keyword Oceanography
dc.subject.keyword Aquatic Science
dc.subject.keyword Ecology
dc.subject.keyword Water Science and Technology
dc.subject.keyword Soil Science
dc.subject.keyword Geochemistry and Petrology
dc.subject.keyword Earth-Surface Processes
dc.subject.keyword Atmospheric Science
dc.subject.keyword Earth and Planetary Sciences (miscellaneous)
dc.subject.keyword Space and Planetary Science
dc.subject.keyword Palaeontology
dc.subject.keyword 1171 Geosciences
dc.identifier.urn URN:NBN:fi:aalto-201806183366
dc.identifier.doi 10.1002/2017JA025054 info:eu-repo/date/embargoEnd/2018-09-27

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