Solar wind structure sources and periodicities of auroral electron power over three solar cycles |
| |
| Authors: | Barbara A Emery Ian G Richardson David S Evans Frederick J Rich |
| |
| Institution: | 1. High Altitude Observatory/NCAR, Boulder, CO, USA;2. Goddard Space Flight Center/NASA, MD, USA;3. University of Maryland, MD, USA;4. Space Weather Prediction Center/NOAA, Boulder, CO, USA;5. Air Force Geophysics Laboratory, MA, USA;1. Instituto Nacional de Pesquisas Espaciais (INPE), Av. dos Astronautas, 1758, Sao Jose dos Campos, SP 12227-010, Brazil;2. Jet Propulsion Laboratory, California Institute of Technology, 4800 Oak Grove Drive Pasadena, California 91109, Pasadena, CA, USA;1. Magnetic Observatory, CSIR-National Geophysical Research Institute, Hyderabad-500007, India;2. Department of Geophysics, Andhra University, Vishakhapatnam-530003, India;1. Laboratorio de Física e Astronomia, Universidade do Vale do Paraiba (UNIVAP), Av Shishima Hifumi, 2911, Urbanova, 12244-000 Sao Jose dos Campos, SP, Brazil;2. Unidade Academica de Fisica, Universidade Federal de Campina Grande (UFCG), Av. Aprigio Veloso, 882 – Bloco CY – Bairro Universitario, 58.109-970 Campina Grande, PB, Brazil;3. Divisão de Aeronomia, Instituto Nacional de Pesquisas Espaciais (INPE), Av. dos Astronautas, 12.227-010 Sao José dos Campos, SP, Brazil;4. Departamento de Física, Universidade Estadual da Paraíba, Rua da Baraúnas, 351, Bairro Universitário, Campina Grande, PB, Brazil;1. Department of Physics, St. Xavier''s College, Thumba, Trivandrum, India;2. Department of Physics, Mar Ivanios College, Trivandrum, India;3. Department of Physics, University College, Trivandrum, India;1. Department of Physics, P.O. Box 64, University of Helsinki, Finland;2. Space Sciences Laboratory, University of California, Berkeley, CA, USA;3. Department of Astronomy, University of Maryland, College Park, MD, USA;4. Heliophysics Science Division, NASA/Goddard Space Flight Center, Greenbelt, MD, USA;5. Institute of Geophysics and Planetary Physics, UCLA, Los Angeles, CA, USA |
| |
| Abstract: | We assess the contributions of various types of solar wind structures (transients, coronal hole high-speed streams (HSS), and slow-speed wind) to hourly average auroral electron power (Pe). The time variation of the solar wind velocity (Vsw) and Pe are determined by HSS, which contribute ～47% to Pe and Vsw. Transients contribute ～42% of Pe in solar maxima, and ～6% in solar minimum. Cross-correlations of Pe with Vsw|B| for negative Bz are significant. Pe exhibits solar rotational periodicities similar to those for Vsw, with strong 7- and 9-day periodicities in 2005–2008 and equinox semiannual periodicities in 1995–1999. |
| |
| Keywords: | |
| 本文献已被 ScienceDirect 等数据库收录！ |
|
