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dc.contributor.authorBland, Emma
dc.contributor.authorPartamies, Noora
dc.contributor.authorHeino, Erkka
dc.contributor.authorYukimatu, Akira Sessai
dc.contributor.authorMiyaoka, Hiroshi
dc.date.accessioned2020-02-17T09:35:30Z
dc.date.available2020-02-17T09:35:30Z
dc.date.issued2019-07-04
dc.description.abstractWe demonstrate that the Super Dual Auroral Radar Network (SuperDARN) radar at Syowa station, Antarctica, can be used to detect high frequency radio wave attenuation in the <i>D</i> region ionosphere during energetic electron precipitation (EEP) events. EEP‐related attenuation is identified in the radar data as a sudden reduction in the backscatter power and background noise parameters. We focus initially on EEP associated with pulsating aurora and use images from a colocated all‐sky camera as a validation data set for the radar‐based EEP event detection method. Our results show that high‐frequency attenuation that commences during periods of optical pulsating aurora typically continues for 2–4 hr after the camera stops imaging at dawn. We then use the radar data to determine EEP occurrence rates as a function of magnetic local time (MLT) using a database of 555 events detected in 2011. EEP occurrence rates are highest in the early morning sector and lowest at around 15:00–18:00 MLT. The postmidnight and morning sector occurrence rates exhibit significant seasonal variations, reaching approximately 50% in the winter and 15% in the summer, whereas no seasonal variations were observed in other MLT sectors. The mean event lifetime determined from the radar data was 2.25 hr, and 10% of events had lifetimes exceeding 5 hr.en_US
dc.identifier.citationBland E, Partamies N, Heino E, Yukimatu, Miyaoka H. Energetic electron precipitation occurrence rates determined using the Syowa East SuperDARN Radar. Journal of Geophysical Research (JGR): Space Physics. 2019;124(7):6253-6265en_US
dc.identifier.cristinIDFRIDAID 1723349
dc.identifier.doi10.1029/2018JA026437
dc.identifier.issn2169-9380
dc.identifier.issn2169-9402
dc.identifier.urihttps://hdl.handle.net/10037/17406
dc.language.isoengen_US
dc.publisherWileyen_US
dc.relation.journalJournal of Geophysical Research (JGR): Space Physics
dc.relation.projectIDNorges forskningsråd: 287427en_US
dc.relation.projectIDNorges forskningsråd: 223252en_US
dc.relation.projectIDinfo:eu-repo/grantAgreement/RCN/SFF/223252/Norway/Birkeland Center for Space Science/BCSS/en_US
dc.relation.projectIDinfo:eu-repo/grantAgreement/RCN/ROMFORSK/287427/Norway/Which types of particle precipitation matter in the middle atmosphere?//en_US
dc.relation.urihttps://agupubs.onlinelibrary.wiley.com/doi/full/10.1029/2018JA026437
dc.rights.accessRightsopenAccessen_US
dc.rights.holderCopyright 2019 The Author(s)en_US
dc.subjectVDP::Mathematics and natural science: 400en_US
dc.subjectVDP::Matematikk og Naturvitenskap: 400en_US
dc.titleEnergetic electron precipitation occurrence rates determined using the Syowa East SuperDARN Radaren_US
dc.type.versionpublishedVersionen_US
dc.typeJournal articleen_US
dc.typeTidsskriftartikkelen_US
dc.typePeer revieweden_US


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