Atmospheric semidiurnal solar tide response to sudden stratospheric warmings in the JAGUAR‐DAS Wholen eutral Atmosphere Reanalysis (JAWARA) during 2004–2023

The migrating semidiurnal solar tide (SW2) originating from the troposphere and stratosphere is a known source of variability in the thermosphere‐ionosphere system, and thus is important for accurate space weather prediction. Previous studies have established that the upward‐propagation of SW2 into the lower thermosphere can be influenced by Arctic sudden stratospheric warmings (SSWs). In particular, the recent study by Yamazaki and Siddiqui (2024, doi.org/10.1029/2023jd040222 ) showed that the component of SW2 that is antisymmetric about the equator is enhanced.

However, their study had a limitation in time resolution, as the satellite data they used required a 60‐day integration for determining tides. The present study resolves this issue by using hourly temperature data from the JAGUAR‐DAS Whole neutral Atmosphere Reanalysis (JAWARA). SW2 variability in the lower thermosphere is examined for all the boreal winters (December–February) from 2004/2005 to 2022/2023.