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- Title
Comment on "First Observation of Mesosphere Response to the Solar Wind High‐Speed Streams" by W. Yi et al.
- Authors
Tsurutani, Bruce T.; Hajra, Rajkumar; Echer, Ezequiel; Lakhina, Gurbax S.
- Abstract
While Yi, Reid, Xue, Younger, Spargo, et al. (2017, http://doi:10.1002/2017JA024446) described the observational results showing solar wind high‐speed stream (HSS) impacts on the mesosphere over Antarctica, the specific physical mechanism behind them was not discussed. We discussed here how magnetospheric wave‐particle interactions and energetic ~20‐ to 50‐keV electron precipitation into the auroral zone atmosphere (diffuse auroras) during HSS intervals can cause the observed effects in the mesosphere. Key Points: During HSS substorm events, fresh ~10‐ to 100‐keV electrons are injected and scattered by waves creating the diffuse auroraThe ~20‐ to 50‐keV portion of the precipitating electrons deposit most of their energy at heights of ~95 km down to ~85 kmThe energy deposition creates NOx and3 O3 loss. This leads to atmospheric cooling and modulation of zonal wind speeds and neutral densities
- Subjects
ANTARCTICA; MESOSPHERE; SOLAR wind; WIND speed; WAVE-particle interactions; ELECTRON precipitation
- Publication
Journal of Geophysical Research. Space Physics, 2019, Vol 124, Issue 10, p8165
- ISSN
2169-9380
- Publication type
Article
- DOI
10.1029/2018JA026447