The Response of the Venusian Plasma Environment to the Passage of an ICME

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dc.contributor Aalto-yliopisto fi
dc.contributor Aalto University en Dimmock, A. P. Alho, M. Kallio, E. Pope, S. A. Zhang, T. L. Kilpua, E. Pulkkinen, T. I. Futaana, Y. Coates, A. J. 2018-12-10T10:15:17Z 2018-12-10T10:15:17Z 2018-05
dc.identifier.citation Dimmock , A P , Alho , M , Kallio , E , Pope , S A , Zhang , T L , Kilpua , E , Pulkkinen , T I , Futaana , Y & Coates , A J 2018 , ' The Response of the Venusian Plasma Environment to the Passage of an ICME : Hybrid Simulation Results and Venus Express Observations ' , Journal of geophysical research: Space physics , vol. 123 , no. 5 , pp. 3580-3601 . en
dc.identifier.issn 2169-9380
dc.identifier.issn 2169-9402
dc.identifier.other PURE UUID: 40a1b078-1853-4a6d-a4a0-b87b74b3f8c8
dc.identifier.other PURE ITEMURL:
dc.identifier.other PURE LINK:
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dc.description.abstract Owing to the heritage of previous missions such as the Pioneer Venus Orbiter and Venus Express, the typical global plasma environment of Venus is relatively well understood. On the other hand, this is not true for more extreme driving conditions such as during passages of interplanetary coronal mass ejections (ICMEs). One of the outstanding questions is how do ICMEs, either the ejecta or sheath portions, impact (1) the Venusian magnetic topology and (2) escape rates of planetary ions? One of the main issues encountered when addressing these problems is the difficulty of inferring global dynamics from single spacecraft obits; this is where the benefits of simulations become apparent. In the present study, we present a detailed case study of an ICME interaction with Venus on 5 November 2011 in which the magnetic barrier reached over 250 nT. We use both Venus Express observations and hybrid simulation runs to study the impact on the field draping pattern and the escape rates of planetary O+ ions. The simulation showed that the magnetic field line draping pattern around Venus during the ICME is similar to that during typical solar wind conditions and that O+ ion escape rates are increased by approximately 30% due to the ICME. Moreover, the atypically large magnetic barrier appears to manifest from a number of factors such as the flux pileup, dayside compression, and the driving time from the ICME ejecta. en
dc.format.extent 22
dc.format.extent 3580-3601
dc.format.mimetype application/pdf
dc.language.iso en en
dc.relation.ispartofseries Journal of geophysical research: Space physics en
dc.relation.ispartofseries Volume 123, issue 5 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.subject.other 115 Astronomy and space science en
dc.title The Response of the Venusian Plasma Environment to the Passage of an ICME 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 University of Sheffield
dc.contributor.department Austrian Academy of Sciences
dc.contributor.department University of Helsinki
dc.contributor.department Uppsala University
dc.contributor.department University College London
dc.subject.keyword Interplanetary coronal mass ejection
dc.subject.keyword Model-data comparison
dc.subject.keyword Oxygen escape
dc.subject.keyword Planetary magnetospheres
dc.subject.keyword Venus
dc.subject.keyword Venus Express
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.subject.keyword 115 Astronomy and space science
dc.identifier.urn URN:NBN:fi:aalto-201812106025
dc.identifier.doi 10.1029/2017JA024852
dc.type.version publishedVersion info:eu-repo/date/embargoEnd/2018-10-07

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