![\"Alexa](\"https:\/\/teams.issibern.ch\/electromagneticwaveactivity\/wp-content\/uploads\/sites\/7\/2021\/08\/ajh_portrait-300x235.jpg\")
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Associate Lab chief\u00a0<\/span><\/p>\n Ionospheric, Thermospheric, Mesospheric Lab<\/span><\/p>\n NASA\/Goddard Space Flight Center<\/span><\/p>\n She\/her\/hers<\/p>\n Alexa.J.Halford at\u00a0 nasa.gov<\/span><\/a><\/p>\n \u200bFollowing graduation from Augsburg College in Minneapolis MN Alexa Halford went on to receive a Masters in Astronomy and Planetary Sciences from University of Colorado at Boulder and a Ph.D. in Physics at the University of Newcastle Australia. Shortly after completing her Ph.D. work, Halford won a highly competitive \u201cVisiting Young Scientist\u201d fellowship from Dartmouth College. She then moved to the Aerospace Corporation and is now the deputy director of the Ionosphere, Thermosphere, Mesosphere lab at NASA Goddard Space Flight Center. At Goddard she works as the Heliophysics and Space Weather Goddard strategic lead for Artemis, the deputy PI for petitSat, and on several other committees\/working groups associated with space weather.<\/span><\/p>\n <\/p>\n Dr. Halford\u2019s expertise for this ISSI team resides in wave-particle interactions and their impact on loss from the magnetosphere to the ionosphere and upper atmosphere.<\/span><\/p>\n \u00a0<\/span><\/p>\n Shumko M, Gallardo-Lacourt B, Halford AJ, Blum LW, Liang J, Miyoshi Y, Hosokawa K, Donovan E, Mann IR, Murphy K, Spanswick EL, Blake JB, Looper MD and Gillies DM (2022) Proton aurora and relativistic electron microbursts scattered by electromagnetic ion cyclotron waves<\/a>. Front. Astron. Space Sci. 9:975123. doi: 10.3389\/fspas.2022.975123<\/p>\n <\/p>\n Remya,\u00a0 B.,\u00a0 D.G. Sibeck,\u00a0 J.M. Ruohoniemi,\u00a0 B. Kunduri, A.J. Halford,\u00a0 G. D. Reeves,\u00a0 and R. V. Reddy, Association between EMIC wave occurrence and enhanced convection periods during ion injections, 2020, DOI: 10.1029\/2019GL085676, Geophysical Research Letters<\/span><\/p>\n <\/p>\n Bingley, L., V. Angelopoulos, D. Sibeck, X.-J. Zhang, A.J. Halford, The evolution of a pitch-angle\u00a0 \u201dbite-out\u201d\u00a0 scattering\u00a0 signature\u00a0 caused\u00a0 by\u00a0 EMIC\u00a0 wave\u00a0 activity:\u00a0 A\u00a0 case\u00a0 study,\u00a0 (2019), <\/span>https:\/\/doi.org\/10.1029\/2018JA026292<\/span><\/a>, J.Geophys.Res<\/span><\/p>\n <\/p>\n Brito, T., S. Elkington, A. Halford, \u201dA review on ULF waves and their affect on radiation belt dynamics\u201d, The Dynamic Loss of Earth\u2019s Radiation Belts: From loss in the magnetosphere to particle precipitation in the atmosphere, 2019, edited by A. Jaynes and M. Usanova<\/span><\/p>\n <\/p>\n Lessard,\u00a0 M.\u00a0 R.,\u00a0 K.\u00a0 Paulson,\u00a0 H.\u00a0 Spence,\u00a0 C.\u00a0 Weaver,\u00a0 M.\u00a0 J.\u00a0 Engebretson,\u00a0 R.\u00a0 Millan,\u00a0 L.\u00a0 A. Woodger, A.J.\u00a0 Halford ,\u00a0 R.\u00a0 Horne,\u00a0 C.\u00a0 J.\u00a0 Rodger,\u00a0 and\u00a0 A.\u00a0 Hendry,\u00a0 \u201cGeneration\u00a0 of\u00a0 EMIC<\/span><\/p>\n Waves and Effects on Particle Precipitation During a Moderate Storm with Bz > 0\u201d, (2019), <\/span>https:\/\/doi.org\/10.1029\/2019JA026477<\/span><\/a> J.Geophys.Res<\/span><\/p>\n <\/p>\n Medeiros,\u00a0 C.,\u00a0 V.M.\u00a0 Souza,\u00a0 L.E.A.\u00a0 Vieira,\u00a0 D.G.\u00a0 Sibeck, A.J.\u00a0 Halford ,\u00a0 L.A.\u00a0 Da\u00a0 Silva,\u00a0 L.R. Alves,\u00a0 J.P. Marchezi,\u00a0 R. S. Dallaqua,\u00a0 PR. Jauer,\u00a0 M. Rockenbach,\u00a0 O. Mendes,\u00a0 M. V. Alves, and A. Dal Lago, \u201cInvestigating an Unusual Pitch Angle Distribution During the Electron Flux Dropout on September 12, 2014\u201d, (2019),p.\u00a0 36, vol 872, number 1, 10.3847\/1538-4357\/aaf970 The Astrophysical Journal<\/span><\/p>\n <\/p>\nBrief Bio:<\/span><\/h3>\n
Selected Relevant Publications: (Orcid https:\/\/orcid.org\/0000-0002-5383-4602)<\/a>\u00a0<\/span><\/h3>\n