@InProceedings{MitraGuhaBatiBuri:2022:ReTrPl,
               author = "Mitra, Gourav and Guharay, Amitava and Batista, Paulo Prado and 
                         Buriti, Ricardo",
          affiliation = "Physical Research Laboratory, Ahmedabad, India and Physical 
                         Research Laboratory, Ahmedabad, India and {Instituto Nacional de 
                         Pesquisas Espaciais (INPE)} and {Universidade Federal de Campina 
                         Grande (UFCG)}",
                title = "Response of the traveling planetary waves at low latitude middle 
                         atmosphere during September 2019 minor sudden stratospheric 
                         warming",
            booktitle = "Proceedings...",
                 year = "2022",
         organization = "EGU General Assembly",
            publisher = "EGU",
             abstract = "Planetary wave (PW) associated dynamical variability in the 
                         equatorial and extratropical middle atmosphere during the 
                         September 2019 Southern hemisphere minor sudden stratospheric 
                         warming (SSW) is investigated utilizing meteor radar wind 
                         observations from S{\~a}o Jo{\~a}o do Cariri (7.4°S, 36.5°W) and 
                         Cachoeira Paulista (22.7°S, 45°W) and reanalysis data. Signature 
                         of the mesospheric warming in conjunction with the stratospheric 
                         cooling is found at low latitudes. The strong westerly wind at low 
                         latitudes decelerates notably near 65 km at the onset of the 
                         warming episode, although no wind reversal is observed. The wind 
                         spectra reveal a prevalent quasi-16-day wave (Q16DW) prior to the 
                         SSW and existence of a quasi-6-day wave (Q6DW) after the warming 
                         event. Possible existence of barotropic/baroclinic instability in 
                         the low and mid latitude middle atmosphere may be responsible for 
                         exciting the Q6DW. The traveling PW is primarily found to travel 
                         westward corresponding to zonal wavenumber 1 and 2. Furthermore, 
                         significant latitudinal mixing of airmass between the tropics and 
                         high latitudes is evident in the potential vorticity map. The 
                         Eliassen-Palm flux diagnosis shows the propagation of the Q6DW and 
                         Q16DW from mid to low latitudes during the warming event.",
  conference-location = "Online",
      conference-year = "23-27 May 2022",
                  doi = "10.5194/egusphere-egu22-11510",
                  url = "http://dx.doi.org/10.5194/egusphere-egu22-11510",
             language = "en",
           targetfile = "EGU22-11510-print.pdf",
        urlaccessdate = "30 abr. 2024"
}