@Article{GiongoBBWBPLFJHS:2018:MeFrOb,
author = "Giongo, Gabriel Augusto and Bageston, Jos{\'e} Valentin and
Batista, Paulo Prado and Wrasse, Cristiano Max and Bittencourt,
Gabriela Dornelles and Paulino, Igo and Leme, Neusa Maria Paes and
Fritts, David C. and Janches, Diego and Hocking, Wayne and Schuch,
Nelson Jorge",
affiliation = "{Instituto Nacional de Pesquisas Espaciais (INPE)} and {Instituto
Nacional de Pesquisas Espaciais (INPE)} and {Instituto Nacional de
Pesquisas Espaciais (INPE)} and {Instituto Nacional de Pesquisas
Espaciais (INPE)} and {Universidade Federal de Santa Maria (UFSM)}
and {Universidade Federal de Campina Grande (UFCG)} and {Instituto
Nacional de Pesquisas Espaciais (INPE)} and {Boulder GATS} and
{National Aeronautics and Space Administration (NASA)} and
{University of Western Ontario} and {Instituto Nacional de
Pesquisas Espaciais (INPE)}",
title = "Mesospheric front observations by the OH airglow imager carried
out at Ferraz Station on King George Island, Antarctic Peninsula,
in 2011",
journal = "Annales Geophysicae",
year = "2018",
volume = "36",
number = "1",
pages = "253--264",
month = "Feb.",
keywords = "Atmospheric composition and structure (air-glow and aurora),
meteorology and atmospheric dynamics (middle atmosphere dynamics
waves and tides).",
abstract = "The main goals of this work are to characterize and investigate
the potential wave sources of four mesospheric fronts identified
in the hydroxyl near-infrared (OH-NIR) air-glow images, obtained
with an all-sky airglow imager installed at Comandante Ferraz
Antarctic Station (EACF, as per its Portuguese acronym) located on
King George Island in the Antarctic Peninsula. We identified and
analyzed four mesospheric fronts in 2011 over King George Island.
In addition, we investigate the atmospheric background environment
between 80 and 100 km altitude and discuss the ducts and
propagation conditions for these waves. For that, we used wind
data obtained from a meteor radar operated at EACF and temperature
data obtained from the TIMED/SABER satellite. The vertical
wavenumber squared, m(2), was calculated for each of the four
waves. Even though no clearly defined duct (indicated by positive
values of m(2) sandwiched between layers above and below with m(2)
< 0) was found in any of the events, favorable propagation
conditions for horizontal propagation of the fronts were found in
three cases. In the fourth case, the wave front did not find any
duct support and it appeared to dissipate near the zenith,
transferring energy and momentum to the medium and, consequently,
accelerating the wind in the wave propagation direction (near to
south) above the OH peak (88-92 km). The likely wave sources for
these four cases were investigated by using meteorological
satellite images and in two cases we could find that strong
instabilities were potential sources, i.e., a cyclonic activity
and a large convective cloud cell. In the other two cases it was
not possible to associate troposphere sources as potential
candidates for the generation of such wave fronts observed in the
mesosphere and secondary wave sources were attributed to these
cases.",
doi = "10.5194/angeo-36-253-2018",
url = "http://dx.doi.org/10.5194/angeo-36-253-2018",
issn = "0992-7689",
language = "en",
targetfile = "giongo_mesospheric.pdf",
urlaccessdate = "27 abr. 2024"
}