Large‐scale structures in the Polar Rain
作者： Yongliang Zhang , Larry Paxton , Hyosub Kil
DOI: 10.1002/2013GL058245
关键词: Electron 、 Magnetopause 、 Physics 、 Flux transfer event 、 Polar 、 Wavelength 、 Geophysics 、 Event (particle physics) 、 Atmospheric sciences 、 Solar wind 、 Defense Meteorological Satellite Program
摘要: [1] We present two distinctive spatial structures (~140 and ~1000 km) in the polar rain electron energy fluxes observed by Defense Meteorological Satellite Program satellites. The 16 May 2005 event indicates that sources of ~1000 km were not solar wind electrons. Statistical analysis 239 events shows associated with high speed density while ~140 km did depend on conditions. are about 5 0.7 RE when mapped to magnetopause comparable typical Kelvin-Helmholtz (KH) wavelengths (3–14 RE) flux transfer (FTE) sizes (~0.6–1.3 magnetopause. Our calculations indicate KH waves unstable under density. observations suggest likely caused FTE
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