@Article{MitraGuhaBatiBuri:2022:ImSe20,
               author = "Mitra, G. and Guharay, A. and Batista, Paulo Prado and Buriti, R. 
                         A.",
          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 = "Impact of the September 2019 Minor Sudden Stratospheric Warming on 
                         the Low-Latitude Middle Atmospheric Planetary Wave Dynamics",
              journal = "Journal of Geophysical Research: Atmospheres",
                 year = "2022",
               volume = "127",
               number = "1",
                pages = "e2021JD035538",
                month = "Jan.",
             keywords = "middle atmospheric dynamics, planetary waves, sudden stratospheric 
                         warming.",
             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. Both traveling and stationary waves exhibit 
                         notable activities during the warming event. Although involvement 
                         of both zonal wavenumbers 1 and 2 PWs are found in the event, PW 
                         with zonal wavenumber 1 seems to play a vital role in 
                         preconditioning the same. 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.",
                  doi = "10.1029/2021JD035538",
                  url = "http://dx.doi.org/10.1029/2021JD035538",
                 issn = "2169-8996 and 2169-897X",
             language = "en",
           targetfile = "mitra_2022.pdf",
        urlaccessdate = "25 jun. 2024"
}