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Comparison of predictive estimates of high‐latitude electrodynamics with observations of global‐scale Birkeland currents
dc.contributor.authorAnderson, Brian J.
dc.contributor.authorKorth, Haje
dc.contributor.authorWelling, Daniel T.
dc.contributor.authorMerkin, Viacheslav G.
dc.contributor.authorWiltberger, Michael J.
dc.contributor.authorRaeder, Joachim
dc.contributor.authorBarnes, Robin J.
dc.contributor.authorWaters, Colin L.
dc.contributor.authorPulkkinen, Antti A.
dc.contributor.authorRastaetter, Lutz
dc.date.accessioned2017-04-14T15:11:15Z
dc.date.available2018-04-02T18:03:24Zen
dc.date.issued2017-02
dc.identifier.citationAnderson, Brian J.; Korth, Haje; Welling, Daniel T.; Merkin, Viacheslav G.; Wiltberger, Michael J.; Raeder, Joachim; Barnes, Robin J.; Waters, Colin L.; Pulkkinen, Antti A.; Rastaetter, Lutz (2017). "Comparison of predictive estimates of high‐latitude electrodynamics with observations of global‐scale Birkeland currents." Space Weather 15(2): 352-373.
dc.identifier.issn1542-7390
dc.identifier.issn1542-7390
dc.identifier.urihttps://hdl.handle.net/2027.42/136469
dc.description.abstractTwo of the geomagnetic storms for the Space Weather Prediction Center Geospace Environment Modeling challenge occurred after data were first acquired by the Active Magnetosphere and Planetary Electrodynamics Response Experiment (AMPERE). We compare Birkeland currents from AMPERE with predictions from four models for the 4–5 April 2010 and 5–6 August 2011 storms. The four models are the Weimer (2005b) field‐aligned current statistical model, the Lyon‐Fedder‐Mobarry magnetohydrodynamic (MHD) simulation, the Open Global Geospace Circulation Model MHD simulation, and the Space Weather Modeling Framework MHD simulation. The MHD simulations were run as described in Pulkkinen et al. (2013) and the results obtained from the Community Coordinated Modeling Center. The total radial Birkeland current, ITotal, and the distribution of radial current density, Jr, for all models are compared with AMPERE results. While the total currents are well correlated, the quantitative agreement varies considerably. The Jr distributions reveal discrepancies between the models and observations related to the latitude distribution, morphologies, and lack of nightside current systems in the models. The results motivate enhancing the simulations first by increasing the simulation resolution and then by examining the relative merits of implementing more sophisticated ionospheric conductance models, including ionospheric outflows or other omitted physical processes. Some aspects of the system, including substorm timing and location, may remain challenging to simulate, implying a continuing need for real‐time specification.Key PointsPresents the first comparison between observed field‐aligned currents and models previously evaluated for space weather operational useThe model and observed integrated currents are well correlated, but the ratio between them ranges from 1/3 to 3The 2‐D current densities are weakly correlated with observations implying significant areas for improvements in the models
dc.publisherThe National Academies Press
dc.publisherWiley Periodicals, Inc.
dc.subject.otherBirkeland currents
dc.subject.otherAMPERE
dc.subject.othersimulation
dc.subject.othergeomagnetic storm
dc.subject.othervalidation
dc.titleComparison of predictive estimates of high‐latitude electrodynamics with observations of global‐scale Birkeland currents
dc.typeArticleen_US
dc.rights.robotsIndexNoFollow
dc.subject.hlbsecondlevelElectrical Engineering
dc.subject.hlbtoplevelEngineering
dc.description.peerreviewedPeer Reviewed
dc.description.bitstreamurlhttps://deepblue.lib.umich.edu/bitstream/2027.42/136469/1/swe20415_am.pdf
dc.description.bitstreamurlhttps://deepblue.lib.umich.edu/bitstream/2027.42/136469/2/swe20415.pdf
dc.identifier.doi10.1002/2016SW001529
dc.identifier.sourceSpace Weather
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dc.owningcollnameInterdisciplinary and Peer-Reviewed


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