@Article{GuharayBatiBuriSchu:2018:VaQuTi,
author = "Guharay, Amitava and Batista, Paulo Prado and Buriti, Ricardo
Arlen and Schuch, Nelson Jorge",
affiliation = "Space and Atmospheric Sciences Division, Physical Research
Laboratory, Ahmedabad and {Instituto Nacional de Pesquisas
Espaciais (INPE)} and {Universidade Federal de Campina Grande
(UFCG)} and {Instituto Nacional de Pesquisas Espaciais (INPE)}",
title = "On the variability of the quarter-diurnal tide in the MLT over
Brazilian low-latitude stations",
journal = "Earth, Planets and Space",
year = "2018",
volume = "70",
pages = "e140",
month = "Aug.",
keywords = "Quarterdiurnal tide, Mesosphere and lower thermosphere, Meteor
radar observations.",
abstract = "The characteristic features of the quarterdiurnal tide (QDT) in
the mesosphere and lower thermosphere (MLT) are investigated using
meteor radar observations from three low-latitude southern
hemispheric stations, Sao Joao do Cariri (7.4 degrees S, 36.5
degrees W), Cachoeira Paulista (22.7 degrees S, 45 degrees W) and
Santa Maria (29.7 degrees S, 53.7 degrees W) in 2005. The QDT
shows consistent appearance with a weak enhancement during late
summer and fall interval. The QDT amplitudes are found to be much
smaller (<3 m/s) than the longer period tidal components most of
the times of the year consistent with the previous investigations
carried out from various locations over the globe. The vertical
wavelength is found to reach up to 80 km in the MLT maximizing in
winter although most of the times it remains within 20 km.
Therefore, based on the observed characteristics of the QDT, it is
surmised that both the migrating and nonmigrating components are
involved in manifestation of the QDT at present locations. Further
detailed investigations are sought in connection with the
important issues pertained to the actual excitation mechanisms and
existing dominant QDT modes in the low-latitude MLT.",
doi = "10.1186/s40623-018-0910-9",
url = "http://dx.doi.org/10.1186/s40623-018-0910-9",
issn = "1880-5981",
language = "en",
targetfile = "guharay_on.pdf",
urlaccessdate = "03 jun. 2024"
}