Magnetic field power spectra and magnetic radial diffusion coefficients using CRRES magnetometer data

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dc.citation.firstpage973en_US
dc.citation.issueNumber2en_US
dc.citation.journalTitleJournal of Geophysical Research: Space Physicsen_US
dc.citation.lastpage995en_US
dc.citation.volumeNumber120en_US
dc.contributor.authorAli, Ashar F.en_US
dc.contributor.authorElkington, Scot R.en_US
dc.contributor.authorTu, Weichaoen_US
dc.contributor.authorOzeke, Louis G.en_US
dc.contributor.authorChan, Anthony A.en_US
dc.contributor.authorFriedel, Reiner H.W.en_US
dc.date.accessioned2015-05-15T17:06:33Zen_US
dc.date.available2015-05-15T17:06:33Zen_US
dc.date.issued2015en_US
dc.description.abstractWe used the fluxgate magnetometer data from Combined Release and Radiation Effects Satellite (CRRES) to estimate the power spectral density (PSD) of the compressional component of the geomagnetic field in the ∼1 mHz to ∼8 mHz range. We conclude that magnetic wave power is generally higher in the noon sector for quiet times with no significant difference between the dawn, dusk, and the midnight sectors. However, during high Kp activity, the noon sector is not necessarily dominant anymore. The magnetic PSDs have a very distinct dependence on Kp. In addition, the PSDs appear to have a weak dependence on McIlwain parameter L with power slightly increasing as L increases. The magnetic wave PSDs are used along with the Fei et al. (2006) formulation to compute DBLL[CRRES] as a function of L and Kp. The L dependence of DBLL[CRRES] is systematically studied and is shown to depend on Kp. More significantly, we conclude that DELL is the dominant term driving radial diffusion, typically exceeding DBLL by 1–2 orders of magnitude.en_US
dc.identifier.citationAli, Ashar F., Elkington, Scot R., Tu, Weichao, et al.. "Magnetic field power spectra and magnetic radial diffusion coefficients using CRRES magnetometer data." <i>Journal of Geophysical Research: Space Physics,</i> 120, no. 2 (2015) Wiley: 973-995. http://dx.doi.org/10.1002/2014JA020419.en_US
dc.identifier.doihttp://dx.doi.org/10.1002/2014JA020419en_US
dc.identifier.urihttps://hdl.handle.net/1911/80219en_US
dc.language.isoengen_US
dc.publisherWileyen_US
dc.rightsArticle is made available in accordance with the publisher's policy and may be subject to US copyright law. Please refer to the publisher's site for terms of use.en_US
dc.subject.keywordradial diffusionen_US
dc.subject.keyworddiffusion coefficientsen_US
dc.subject.keywordCRRESen_US
dc.subject.keywordULF wavesen_US
dc.titleMagnetic field power spectra and magnetic radial diffusion coefficients using CRRES magnetometer dataen_US
dc.typeJournal articleen_US
dc.type.dcmiTexten_US
dc.type.publicationpublisher versionen_US
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