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

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dc.citation.firstpage973
dc.citation.issueNumber2
dc.citation.journalTitleJournal of Geophysical Research: Space Physics
dc.citation.lastpage995
dc.citation.volumeNumber120
dc.contributor.authorAli, Ashar F.
dc.contributor.authorElkington, Scot R.
dc.contributor.authorTu, Weichao
dc.contributor.authorOzeke, Louis G.
dc.contributor.authorChan, Anthony A.
dc.contributor.authorFriedel, Reiner H.W.
dc.date.accessioned2015-05-15T17:06:33Z
dc.date.available2015-05-15T17:06:33Z
dc.date.issued2015
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.
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.
dc.identifier.doihttp://dx.doi.org/10.1002/2014JA020419
dc.identifier.urihttps://hdl.handle.net/1911/80219
dc.language.isoeng
dc.publisherWiley
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.
dc.subject.keywordradial diffusion
dc.subject.keyworddiffusion coefficients
dc.subject.keywordCRRES
dc.subject.keywordULF waves
dc.titleMagnetic field power spectra and magnetic radial diffusion coefficients using CRRES magnetometer data
dc.typeJournal article
dc.type.dcmiText
dc.type.publicationpublisher version
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