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dc.date.accessioned2013-03-12T08:30:40Z
dc.date.available2013-03-12T08:30:40Z
dc.date.issued2006en_US
dc.date.submitted2007-03-15en_US
dc.identifier.citationGulbrandsen, Njål. Polar cap patch occurrence rate over Svalbard and it's dependence on IMF By. Masteroppgave, University of Oslo, 2006en_US
dc.identifier.urihttp://hdl.handle.net/10852/11150
dc.description.abstractPolar cap patches are regions of enhanced plasma density, seen to drift fromthe sunlit ionosphere on the day side, over the polar cap, and into the night side Auroral oval. The patches are related to substorm activity and reconnection processes in Earth’s magnetic tail. The fact that the patches crosses the open-closed field line boundary (OCB) and goes into the poleward edge of the aurora, can be used as an indicator of the night side merging gap, and the ongoing reconnection processes in the tail. A statistics of the occurrence of polar cap patch OCB crossings at the night side and its dependence on IMF By are made using data from Meridian scanning photometer (MSP) and All-sky camera (ASI) in Ny- Ålesund, Svalbard. This statistics can give indications of the positioning of the night side merging gap and it’s IMF By dependence. Polar cap patches was found to cross the night side OCB over Svalbard in the interval 18:30 – 04:50 MLT with an average of 23:25 MLT, more than half an our before magnetic midnight. The changes in IMF By seems to be able to move the area where patches crosses the OCB by ∼ 1 hour MLT.nor
dc.language.isoengen_US
dc.subjectnordlys plasma ionosfære aurora Svalbard UNISen_US
dc.titlePolar cap patch occurrence rate over Svalbard and it's dependence on IMF Byen_US
dc.typeMaster thesisen_US
dc.date.updated2007-05-04en_US
dc.creator.authorGulbrandsen, Njålen_US
dc.subject.nsiVDP::430en_US
dc.identifier.bibliographiccitationinfo:ofi/fmt:kev:mtx:ctx&ctx_ver=Z39.88-2004&rft_val_fmt=info:ofi/fmt:kev:mtx:dissertation&rft.au=Gulbrandsen, Njål&rft.title=Polar cap patch occurrence rate over Svalbard and it's dependence on IMF By&rft.inst=University of Oslo&rft.date=2006&rft.degree=Masteroppgaveen_US
dc.identifier.urnURN:NBN:no-14865en_US
dc.type.documentMasteroppgaveen_US
dc.identifier.duo54788en_US
dc.contributor.supervisorJøran Moenen_US
dc.identifier.bibsys070652201en_US
dc.identifier.fulltextFulltext https://www.duo.uio.no/bitstream/handle/10852/11150/1/thesis_njaal.pdf


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