Reply to omment by Tsurutani et al. on 'First Observation of Mesosphere Response to the Solar ind igh- peed treams'

摘要

In our recent paper, Yi, Reid, Xue, Younger, Spargo, et al. (2017, https://doi.org/10.1002/ 2017JA024446, hereinafter Y17A), we presented a first analysis of 9- and 6.75-day periodic oscillations observed in the Earth's neutral mesospheric density during 2005 and 2006. These observations reveal a direct coupling between the Sun's upper atmosphere and the Earth's mesosphere. Tsurutani et al. (2019, https:// doi.org/10.1002/2016JA022499, hereinafter T19) have commented on T19 by way of suggesting possible physical mechanisms for Y17A's observations (Y17A do not address possible mechanisms in their paper).