{"@context":{"@vocab":"https://cir.nii.ac.jp/schema/1.0/","rdfs":"http://www.w3.org/2000/01/rdf-schema#","dc":"http://purl.org/dc/elements/1.1/","dcterms":"http://purl.org/dc/terms/","foaf":"http://xmlns.com/foaf/0.1/","prism":"http://prismstandard.org/namespaces/basic/2.0/","cinii":"http://ci.nii.ac.jp/ns/1.0/","datacite":"https://schema.datacite.org/meta/kernel-4/","ndl":"http://ndl.go.jp/dcndl/terms/","jpcoar":"https://github.com/JPCOAR/schema/blob/master/2.0/"},"@id":"https://cir.nii.ac.jp/crid/1360004229804216320.json","@type":"Article","productIdentifier":[{"identifier":{"@type":"DOI","@value":"10.1002/2015ja021960"}},{"identifier":{"@type":"URI","@value":"https://api.wiley.com/onlinelibrary/tdm/v1/articles/10.1002%2F2015JA021960"}},{"identifier":{"@type":"URI","@value":"https://onlinelibrary.wiley.com/doi/pdf/10.1002/2015JA021960"}},{"identifier":{"@type":"URI","@value":"https://onlinelibrary.wiley.com/doi/full-xml/10.1002/2015JA021960"}},{"identifier":{"@type":"URI","@value":"https://agupubs.onlinelibrary.wiley.com/doi/pdf/10.1002/2015JA021960"}}],"resourceType":"学術雑誌論文(journal article)","dc:title":[{"@value":"Edge of polar cap patches"}],"description":[{"type":"abstract","notation":[{"@value":"<jats:title>Abstract</jats:title><jats:p>On the night of 4 December 2013, a sequence of polar cap patches was captured by an all‐sky airglow imager (ASI) in Longyearbyen, Norway (78.1°N, 15.5°E). The 630.0 nm airglow images from the ASI of 4 second exposure time, oversampled the emission of natural lifetime (with quenching) of at least ∼30 sec, introduce no observational blurring effects. By using such high‐quality ASI images, we succeeded in visualizing an asymmetry in the gradients between the leading/trailing edges of the patches in a 2‐D fashion. The gradient in the leading edge was found to be 2–3 times steeper than that in the trailing edge. We also identified fingerlike structures, appearing only along the trailing edge of the patches, whose horizontal scale size ranged from 55 to 210 km. These fingers are considered to be manifestations of plasma structuring through the gradient‐drift instability (GDI), which is known to occur only along the trailing edge of patches. That is, the current 2‐D observations visualized, for the first time, how GDI stirs the patch plasma and such a mixing process makes the trailing edge more gradual. This result strongly implies a close connection between the GDI‐driven plasma stirring and the asymmetry in the large‐scale shape of patches and then suggests that the fingerlike structures can be used as markers to estimate the fine‐scale structure in the plasma flow within patches.</jats:p>"}]}],"creator":[{"@id":"https://cir.nii.ac.jp/crid/1380004229804216322","@type":"Researcher","foaf:name":[{"@value":"K. Hosokawa"}],"jpcoar:affiliationName":[{"@value":"Department of Communication Engineering and Informatics University of Electro‐Communications  Tokyo Japan"},{"@value":"Center for Space Science and Radio Engineering University of Electro‐Communications  Tokyo Japan"}]},{"@id":"https://cir.nii.ac.jp/crid/1380004229804216320","@type":"Researcher","foaf:name":[{"@value":"S. Taguchi"}],"jpcoar:affiliationName":[{"@value":"Department of Geophysics, Graduate School of Science Kyoto University  Kyoto Japan"}]},{"@id":"https://cir.nii.ac.jp/crid/1380004229804216321","@type":"Researcher","foaf:name":[{"@value":"Y. Ogawa"}],"jpcoar:affiliationName":[{"@value":"National Institute of Polar Research  Tokyo Japan"},{"@value":"Department of Polar Science SOKENDAI (Graduate University for Advanced Studies)  Kanagawa Japan"}]}],"publication":{"publicationIdentifier":[{"@type":"PISSN","@value":"21699380"},{"@type":"EISSN","@value":"21699402"}],"prism:publicationName":[{"@value":"Journal of Geophysical Research: Space Physics"}],"dc:publisher":[{"@value":"American Geophysical Union (AGU)"}],"prism:publicationDate":"2016-04","prism:volume":"121","prism:number":"4","prism:startingPage":"3410","prism:endingPage":"3420"},"reviewed":"false","dc:rights":["http://onlinelibrary.wiley.com/termsAndConditions#vor"],"url":[{"@id":"https://api.wiley.com/onlinelibrary/tdm/v1/articles/10.1002%2F2015JA021960"},{"@id":"https://onlinelibrary.wiley.com/doi/pdf/10.1002/2015JA021960"},{"@id":"https://onlinelibrary.wiley.com/doi/full-xml/10.1002/2015JA021960"},{"@id":"https://agupubs.onlinelibrary.wiley.com/doi/pdf/10.1002/2015JA021960"}],"createdAt":"2016-03-18","modifiedAt":"2023-09-07","project":[{"@id":"https://cir.nii.ac.jp/crid/1040282257267109888","@type":"Project","projectIdentifier":[{"@type":"KAKEN","@value":"26302006"},{"@type":"JGN","@value":"JP26302006"},{"@type":"URI","@value":"https://kaken.nii.ac.jp/grant/KAKENHI-PROJECT-26302006/"}],"notation":[{"@language":"ja","@value":"3地点からの全天大気光撮像による極冠域電離圏広域イメージング観測"},{"@language":"en","@value":"Imaging of polar cap ionosphere with three all-sky airglow imagers"}]}],"relatedProduct":[{"@id":"https://cir.nii.ac.jp/crid/1050282810828710400","@type":"Article","resourceType":"学術雑誌論文(journal article)","relationType":["isReferencedBy"],"jpcoar:relatedTitle":[{"@language":"en","@value":"Horizontal profile of a moving red line cusp aurora"}]},{"@id":"https://cir.nii.ac.jp/crid/1360004233287111552","@type":"Article","resourceType":"学術雑誌論文(journal article)","relationType":["references"],"jpcoar:relatedTitle":[{"@value":"Decay of polar cap patch"}]},{"@id":"https://cir.nii.ac.jp/crid/1360004233290333952","@type":"Article","resourceType":"学術雑誌論文(journal article)","relationType":["references"],"jpcoar:relatedTitle":[{"@value":"Space‐time variability of polar cap patches: Direct evidence for internal plasma structuring"}]},{"@id":"https://cir.nii.ac.jp/crid/1360017282189349760","@type":"Article","resourceType":"学術雑誌論文(journal article)","relationType":["isReferencedBy"],"jpcoar:relatedTitle":[{"@value":"GPS Scintillations and TEC Variations in Association With a Polar Cap Arc"}]},{"@id":"https://cir.nii.ac.jp/crid/1360285705151858816","@type":"Article","resourceType":"学術雑誌論文(journal article)","relationType":["references"],"jpcoar:relatedTitle":[{"@value":"Two‐dimensional direct imaging of structuring of polar cap patches"}]},{"@id":"https://cir.nii.ac.jp/crid/1360286991027115776","@type":"Article","resourceType":"学術雑誌論文(journal article)","relationType":["isReferencedBy"],"jpcoar:relatedTitle":[{"@value":"Airglow Patches in the Polar Cap Region: A Review"}]},{"@id":"https://cir.nii.ac.jp/crid/1360292617913257216","@type":"Article","relationType":["references"],"jpcoar:relatedTitle":[{"@value":"Propagation characteristics of nighttime mesospheric and thermospheric waves observed by optical mesosphere thermosphere imagers at middle and low latitudes"}]},{"@id":"https://cir.nii.ac.jp/crid/1360292619415763072","@type":"Article","relationType":["references"],"jpcoar:relatedTitle":[{"@value":"Observations of the response time of high-latitude ionospheric convection to variations in the interplanetary magnetic field using EISCAT and IMP-8 data"}]},{"@id":"https://cir.nii.ac.jp/crid/1360292619489057152","@type":"Article","relationType":["references"],"jpcoar:relatedTitle":[{"@value":"Theories of high‐latitude ionospheric irregularities: A review"}]},{"@id":"https://cir.nii.ac.jp/crid/1360292619639513088","@type":"Article","relationType":["references"],"jpcoar:relatedTitle":[{"@value":"GPS phase scintillation and proxy index at high latitudes during a moderate geomagnetic storm"}]},{"@id":"https://cir.nii.ac.jp/crid/1360292620756903168","@type":"Article","relationType":["references"],"jpcoar:relatedTitle":[{"@value":"Structures in ionospheric number density and velocity associated with polar cap ionization patches"}]},{"@id":"https://cir.nii.ac.jp/crid/1360306906103144704","@type":"Article","resourceType":"学術雑誌論文(journal article)","relationType":["isReferencedBy"],"jpcoar:relatedTitle":[{"@value":"Science highlights from the Kjell Henriksen Observatory on Svalbard"}]},{"@id":"https://cir.nii.ac.jp/crid/1360567183238321408","@type":"Article","resourceType":"学術雑誌論文(journal article)","relationType":["references"],"jpcoar:relatedTitle":[{"@value":"Relationship between polar cap patches and field‐aligned irregularities as observed with an all‐sky airglow imager at Resolute Bay and the PolarDARN radar at Rankin Inlet"}]},{"@id":"https://cir.nii.ac.jp/crid/1360567183243799424","@type":"Article","resourceType":"学術雑誌論文(journal article)","relationType":["references"],"jpcoar:relatedTitle":[{"@value":"Double bursts inside a poleward‐moving auroral form in the cusp"}]},{"@id":"https://cir.nii.ac.jp/crid/1360848654730691840","@type":"Article","resourceType":"学術雑誌論文(journal article)","relationType":["references"],"jpcoar:relatedTitle":[{"@value":"Global imaging of polar cap patches with dual airglow imagers"}]},{"@id":"https://cir.nii.ac.jp/crid/1360865815685080576","@type":"Article","resourceType":"学術雑誌論文(journal article)","relationType":["isReferencedBy"],"jpcoar:relatedTitle":[{"@value":"On the Creation, Depletion, and End of Life of Polar Cap Patches"}]},{"@id":"https://cir.nii.ac.jp/crid/1361137045300454016","@type":"Article","relationType":["references"],"jpcoar:relatedTitle":[{"@value":"Substorm onset and expansion phase intensification precursors seen in polar cap patches and arcs"}]},{"@id":"https://cir.nii.ac.jp/crid/1361418518568866560","@type":"Article","relationType":["references"],"jpcoar:relatedTitle":[{"@value":"<i>F</i> layer ionization patches in the polar cap"}]},{"@id":"https://cir.nii.ac.jp/crid/1361418520261217920","@type":"Article","relationType":["references"],"jpcoar:relatedTitle":[{"@value":"Case for a new process, not mechanism, for cusp irregularity production"}]},{"@id":"https://cir.nii.ac.jp/crid/1361699993793998208","@type":"Article","relationType":["references"],"jpcoar:relatedTitle":[{"@value":"Estimating drift velocity of polar cap patches with all‐sky airglow imager at Resolute Bay, Canada"}]},{"@id":"https://cir.nii.ac.jp/crid/1361699994199072000","@type":"Article","relationType":["references"],"jpcoar:relatedTitle":[{"@value":"Sharpening our thinking about polar cap ionospheric patch morphology, research, and mitigation techniques"}]},{"@id":"https://cir.nii.ac.jp/crid/1361699995360788864","@type":"Article","relationType":["references"],"jpcoar:relatedTitle":[{"@value":"Structuring of high latitude plasma patches with variable drive"}]},{"@id":"https://cir.nii.ac.jp/crid/1362544419196585088","@type":"Article","relationType":["references"],"jpcoar:relatedTitle":[{"@value":"Structure and occurrence of polar ionization patches"}]},{"@id":"https://cir.nii.ac.jp/crid/1362544419377631488","@type":"Article","relationType":["references"],"jpcoar:relatedTitle":[{"@value":"Swarm in situ observations of <b><i>F</i></b> region polar cap patches created by cusp precipitation"}]},{"@id":"https://cir.nii.ac.jp/crid/1363107370992835200","@type":"Article","relationType":["references"],"jpcoar:relatedTitle":[{"@value":"HF radar polar patch formation revisited: summer and winter variations in dayside plasma structuring"}]},{"@id":"https://cir.nii.ac.jp/crid/1363670319987367040","@type":"Article","relationType":["references"],"jpcoar:relatedTitle":[{"@value":"Space weather challenges of the polar cap ionosphere"}]},{"@id":"https://cir.nii.ac.jp/crid/1364233268694945792","@type":"Article","relationType":["references"],"jpcoar:relatedTitle":[{"@value":"In situ measurements of plasma irregularity growth in the cusp ionosphere"}]},{"@id":"https://cir.nii.ac.jp/crid/1364233269594288640","@type":"Article","relationType":["references"],"jpcoar:relatedTitle":[{"@value":"On the entry and transit of high‐density plasma across the polar cap"}]},{"@id":"https://cir.nii.ac.jp/crid/1364233271016098176","@type":"Article","relationType":["references"],"jpcoar:relatedTitle":[{"@value":"First in‐situ measurements of HF radar echoing targets"}]},{"@id":"https://cir.nii.ac.jp/crid/2051151842047683840","@type":"Article","resourceType":"学術雑誌論文(journal article)","relationType":["isReferencedBy"],"jpcoar:relatedTitle":[{"@value":"Imaging of polar cap patches with a low-cost airglow camera : pilot observations in Svalbard, Norway"}]}],"dataSourceIdentifier":[{"@type":"CROSSREF","@value":"10.1002/2015ja021960"},{"@type":"KAKEN","@value":"PRODUCT-20662043"},{"@type":"OPENAIRE","@value":"doi_dedup___::e1aa0210f16b65b1900309b801362ac7"},{"@type":"CROSSREF","@value":"10.1029/2020ja028968_references_DOI_5gX5kxnnB4wQFS9dsWvSB4dwqUk"},{"@type":"CROSSREF","@value":"10.1007/s11214-019-0616-8_references_DOI_5gX5kxnnB4wQFS9dsWvSB4dwqUk"},{"@type":"CROSSREF","@value":"10.1139/as-2024-0009_references_DOI_5gX5kxnnB4wQFS9dsWvSB4dwqUk"},{"@type":"CROSSREF","@value":"10.1002/2016ja023115_references_DOI_5gX5kxnnB4wQFS9dsWvSB4dwqUk"},{"@type":"CROSSREF","@value":"10.1029/2023ja031739_references_DOI_5gX5kxnnB4wQFS9dsWvSB4dwqUk"},{"@type":"CROSSREF","@value":"10.1186/s40623-019-1094-7_references_DOI_YWyPJZgAEbzyrlsLpaX9aT7bunM"}]}