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Comparison of local energy conversion estimates from Cluster with global MHD simulations
Uppsala University, Disciplinary Domain of Science and Technology, Physics, Swedish Institute of Space Physics, Uppsala Division.
Uppsala University, Disciplinary Domain of Science and Technology, Physics, Swedish Institute of Space Physics, Uppsala Division.
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2008 (English)In: Geophysical Research Letters, ISSN 0094-8276, E-ISSN 1944-8007, Vol. 35, no 21, L21104- p.Article in journal (Refereed) Published
Abstract [en]

The local energy conversion across the magnetopause has been estimated with Cluster for two magnetopause crossings. A load region, conversion from magnetic to particle energy, was identified on the dayside high-latitude magnetopause during south/dawnward IMF. Another crossing of the dawn flank magnetotail during dominantly duskward IMF was identified as a generator region where the magnetosphere is loaded with magnetic energy. The observations have been compared to results of the BATS-R-US global MHD simulation based on observed IMF conditions. BATS-R-US reproduced the magnetopause regions crossed by Cluster as a load and a generator region, correspondingly. The magnitude of the estimated energy conversion from Cluster and the model are in quite good agreement. BATS-R-US cannot reproduce the observed sharp magnetopause and some topological differences between the observations and the model occur.

Place, publisher, year, edition, pages
2008. Vol. 35, no 21, L21104- p.
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Physical Sciences
Identifiers
URN: urn:nbn:se:uu:diva-149303DOI: 10.1029/2008GL035854ISI: 000260789300003OAI: oai:DiVA.org:uu-149303DiVA: diva2:404459
Available from: 2011-03-17 Created: 2011-03-17 Last updated: 2017-12-11Bibliographically approved

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Vaivads, Andris

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