{"@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/1362262944524704256.json","@type":"Article","productIdentifier":[{"identifier":{"@type":"DOI","@value":"10.1029/2010gl043968"}},{"identifier":{"@type":"URI","@value":"https://api.wiley.com/onlinelibrary/tdm/v1/articles/10.1029%2F2010GL043968"}},{"identifier":{"@type":"URI","@value":"https://agupubs.onlinelibrary.wiley.com/doi/pdf/10.1029/2010GL043968"}}],"dc:title":[{"@value":"Periodic spacing between consecutive equatorial plasma bubbles"}],"description":[{"type":"abstract","notation":[{"@value":"<jats:p>We analyze three‐years of data collected by a field‐aligned airglow imaging system located at the Cerro Tololo Inter‐American Observatory near La Serena, Chile to determine the occurrence of equatorial plasma bubbles (EPBs). On 317 of the 552 predominately clear nights of observations, structure indicative of EPBs is present. On 123 of these nights, multiple EPBs with periodic spacings were recorded with 88 nights showing 3 or more consecutive bubbles. We suggest that the periodic spacing of EPBs could be related to the properties of an underlying seed mechanism, namely gravity waves (GWs). The distribution of spacings compares favorably to the spectrum of GW induced traveling ionospheric disturbances (TIDs) measured by Vadas and Crowley (2010) from a similar geographic latitude in the northern hemisphere. Furthermore, the distribution of spacings decreases from 2006 through 2009, tracking the corresponding decrease in the thermospheric neutral temperature, <jats:italic>T</jats:italic><jats:sub><jats:italic>n</jats:italic></jats:sub>. As <jats:italic>T</jats:italic><jats:sub><jats:italic>n</jats:italic></jats:sub> decreases, GWs with larger horizontal wavelengths have smaller initial amplitudes and cannot propagate as easily to EPB seeding altitudes. Thus, our observations are consistent with GW theory.</jats:p>"}]}],"creator":[{"@id":"https://cir.nii.ac.jp/crid/1380848661784279043","@type":"Researcher","foaf:name":[{"@value":"J. J. Makela"}],"jpcoar:affiliationName":[{"@value":"Department of Electrical and Computer Engineering University of Illinois at Urbana‐Champaign  Urbana Illinois USA"}]},{"@id":"https://cir.nii.ac.jp/crid/1382262944524704257","@type":"Researcher","foaf:name":[{"@value":"S. L. Vadas"}],"jpcoar:affiliationName":[{"@value":"Colorado Research Associates, NorthWest Research Associates  Boulder Colorado USA"}]},{"@id":"https://cir.nii.ac.jp/crid/1382262944524704259","@type":"Researcher","foaf:name":[{"@value":"R. Muryanto"}],"jpcoar:affiliationName":[{"@value":"Department of Electrical and Computer Engineering University of Illinois at Urbana‐Champaign  Urbana Illinois USA"}]},{"@id":"https://cir.nii.ac.jp/crid/1382262944524704260","@type":"Researcher","foaf:name":[{"@value":"T. Duly"}],"jpcoar:affiliationName":[{"@value":"Department of Electrical and Computer Engineering University of Illinois at Urbana‐Champaign  Urbana Illinois USA"}]},{"@id":"https://cir.nii.ac.jp/crid/1382262944524704258","@type":"Researcher","foaf:name":[{"@value":"G. Crowley"}],"jpcoar:affiliationName":[{"@value":"Atmospheric and Space Technology Research Associates  San Antonio Texas USA"}]}],"publication":{"publicationIdentifier":[{"@type":"PISSN","@value":"00948276"},{"@type":"EISSN","@value":"19448007"}],"prism:publicationName":[{"@value":"Geophysical Research Letters"}],"dc:publisher":[{"@value":"American Geophysical Union (AGU)"}],"prism:publicationDate":"2010-07","prism:volume":"37","prism:number":"14","prism:startingPage":"L14103"},"reviewed":"false","dc:rights":["http://onlinelibrary.wiley.com/termsAndConditions#vor"],"url":[{"@id":"https://api.wiley.com/onlinelibrary/tdm/v1/articles/10.1029%2F2010GL043968"},{"@id":"https://agupubs.onlinelibrary.wiley.com/doi/pdf/10.1029/2010GL043968"}],"createdAt":"2010-07-21","modifiedAt":"2023-10-30","relatedProduct":[{"@id":"https://cir.nii.ac.jp/crid/1360002214348512384","@type":"Article","resourceType":"学術雑誌論文(journal article)","relationType":["isReferencedBy"],"jpcoar:relatedTitle":[{"@value":"Characteristics of large‐scale wave structure observed from African and Southeast Asian longitudinal sectors"}]},{"@id":"https://cir.nii.ac.jp/crid/1360002214350623616","@type":"Article","resourceType":"学術雑誌論文(journal article)","relationType":["isReferencedBy"],"jpcoar:relatedTitle":[{"@value":"Climatology of successive equatorial plasma bubbles observed by GPS ROTI over Malaysia"}]},{"@id":"https://cir.nii.ac.jp/crid/1360002216708878080","@type":"Article","resourceType":"学術雑誌論文(journal article)","relationType":["isReferencedBy"],"jpcoar:relatedTitle":[{"@value":"Simultaneous observations at Darwin of equatorial bubbles by ionosonde-based range/time displays and airglow imaging"}]},{"@id":"https://cir.nii.ac.jp/crid/1360004229804174208","@type":"Article","resourceType":"学術雑誌論文(journal article)","relationType":["isReferencedBy"],"jpcoar:relatedTitle":[{"@value":"West wall structuring of equatorial plasma bubbles simulated by three‐dimensional HIRB model"}]},{"@id":"https://cir.nii.ac.jp/crid/1360004232245213312","@type":"Article","resourceType":"学術雑誌論文(journal article)","relationType":["isReferencedBy"],"jpcoar:relatedTitle":[{"@value":"On validating the relationship of ionogram signatures to large-scale wave structure"}]},{"@id":"https://cir.nii.ac.jp/crid/1360017279829881984","@type":"Article","resourceType":"学術雑誌論文(journal article)","relationType":["isReferencedBy"],"jpcoar:relatedTitle":[{"@value":"Equatorial Plasma Bubble Occurrence Under Propagation of MSTID and MLT Gravity Waves"}]},{"@id":"https://cir.nii.ac.jp/crid/1360285704782774784","@type":"Article","resourceType":"学術雑誌論文(journal article)","relationType":["isReferencedBy"],"jpcoar:relatedTitle":[{"@value":"Off‐great‐circle paths in transequatorial propagation: 2. 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