A Study on the Quarterdiurnal Tide in the Thermosphere at Arecibo During the February 2016 Sudden Stratospheric Warming Event

Abstract

Using data collected from the Arecibo incoherent scatter radar during 5–10 February 2016, we present a study on the quarterdiurnal tide (QDT) from 250 to 360 km. A sudden stratospheric warming (SSW) event occurred on 8 February coincided with our observation. The maximum amplitude of the QDT, at ~37 m/s, is comparable with the diurnal tide and much larger than the semidiurnal tide. The QDT is largely evanescent. Our results manifest that the F region QDT could be as important as the diurnal and semidiurnal tides. The tidal waves show large variability before and after the commencement of the SSW. Our analysis indicates that the enhancement of the QDT is most likely due to the effect of the SSW. Nonlinear interaction of the diurnal tide with the terdiurnal tide is found to play a significant role in amplifying the QDT during the SSW event.

High‐Order Solar Migrating Tides Quench at SSW Onsets

“…In addition to the responses of S2, enhancements of S1, S3, and S4 were also reported during SSWs (e.g., Gong & Zhou, 2011;Gong et al, 2018;Sathishkumar & Sridharan, 2013, respectively). These enhancements were detected using single-station approaches and therefore it is still not clear that are they associated with migrating or nonmigrating components.…”

Comparison of stratospheric evolution during the major sudden stratospheric warming events in 2018 and 2019

“…Sudden stratospheric warming (SSW) is a large‐scale meteorological event that always occurs with the winter polar stratospheric temperature increasing sharply within several days (Matsuno, 1971; Andrews et al, 1987). This polar event is reported to have a large impact on the atmosphere and on the ionosphere at other latitudes (e.g., Ayarzagüena et al, 2011; Gong Y et al, 2013, 2016, 2018a, b; Coy and Pawson, 2015; Butler et al, 2017; Ma Z et al, 2017, 2018, 2020; Xiong JG et al, 2018; Li N et al, 2020). A major SSW event is associated with a reversal of the zonal mean zonal wind (from eastward to westward) at 10 hPa of 60°N and a positive zonal mean temperature difference between 90°N and 60°N at the 10 hPa level.…”

Ionospheric Response to the 2018 Sudden Stratospheric Warming Event at Middle‐ and Low‐Latitude Stations Over China Sector

“…In the Asian sector, the TEC presents monotonic depletion at the dip equator but a semidiurnal perturbation at low latitudes during the 2009 SSW event, which contrasts to an overall semidiurnal pattern in the Peruvian sector (Liu et al, ). Besides semidiurnal variation, another oscillation with a period of 16–20 days was recorded at the middle‐latitude station of Beijing during this event (Xiong et al, ; Gong, Ma, et al, ).…”