Coordinated Observations of Migrating Tides by Multiple Meteor Radars in the Equatorial Mesosphere and Lower Thermosphere. Issue 12 (30th November 2022)

• Record Type: Journal Article
• Authors: Wang, Jianyuan; Yi, Wen; Wu, Jianfei; Chen, Tingdi; Xue, Xianghui; Zeng, Jie; Vincent, Robert A.; Reid, Iain M.; Batista, Paulo P.; Buriti, Ricardo A.; Tsuda, Toshitaka; Mitchell, Nicholas J.; Dou, Xiankang
• Is Part Of: Journal of geophysical research. Volume 127:Issue 12(2022)
• Page Start: n/a
• Page End: n/a
• Publication Date: 2022-11-30
• Subjects: meteor radar -- atmospheric tides -- migrating tides; Magnetospheric physics -- Periodicals; Space environment -- Periodicals; Cosmic physics -- Periodicals; Planets -- Atmospheres -- Periodicals; Heliosphere (Astrophysics) -- Periodicals; Geophysics -- Periodicals; 523.01
• DOI: 10.1029/2022JA030678
• Languages: English
• ISSNs: 2169-9380

Abstract

Abstract: We present the migrating tidal winds decomposed jointly from multiple meteor radars in four longitudinal sectors situated in the equatorial mesosphere and lower thermosphere. The radars are located in Cariri, Brazil (7.4°S, 36.5°W), Kototabang, Indonesia (0.2°S, 100.3°E), Ascension Island, United Kingdom (7.9° S, 14.4° W), and Darwin, Australia (12.3°S, 130.8°E). Harmonic analysis was used to obtain amplitudes and phases for diurnal and semidiurnal solar migrating tides between 82 and 98 km altitude during the period 2005–2008. To verify the reliability of the tidal components calculated by the four meteor radar wind measurements, we also present a similar analysis for the Whole Atmosphere Community Climate Model winds, which suggests that the migrating tides are well observed by the four different radars. The tides include the important tidal components of diurnal westward‐propagating zonal wavenumber 1 and semidiurnal westward‐propagating zonal wavenumber 2. In addition, the results based on observations were compared with the Climatological Tidal Model of the Thermosphere (CTMT). In general, in terms of climatic features, our results for the major components of migrating tides are qualitatively consistent with the CTMT models derived from satellite data. In addition, the tidal amplitudes are unusually stronger in January–February 2006. This result is probably because tides were enhanced by the 2006 Northern Hemisphere stratospheric sudden warming event. Key Points: The diurnal and semidiurnal migrating tides are derived by multi‐meteor radars in the equatorial region The seasonal variations of diurnal westward‐propagating zonal wavenumber 1 (DW1) and semidiurnal westward‐propagating zonal wavenumber 2 (SW2) observations are similar to those tidal components in Climatological Tidal Model of the Thermosphere modeling The unusual enhancements of DW1 and SW2 in February 2006 are possibly associated with the 2006 Northern Hemisphere stratospheric sudden warming event