@Article{BagestonWrBaEFrGoAn:2011:ObMeFr,
author = "Bageston, Jos{\'e} Valentin and Wrasse, Cristiano Max and
Batista, Paulo Prado and E, Hibbins R and Fritts, David C. and
Gobbi, Delano and Andrioli, V{\^a}nia F{\'a}tima",
affiliation = "{} and VSE, Sao Jose Dos Campos, Brazil and {Instituto Nacional de
Pesquisas Espaciais (INPE)} and Norwegian Univ Sci \& Technol,
N-7034 Trondheim, Norway and Colorado Res Associates CoRA,
Boulder, CO USA and {Instituto Nacional de Pesquisas Espaciais
(INPE)}",
title = "Observation of a mesospheric front in a dual duct over King George
Island, Antarctica",
journal = "Atmospheric Chemistry and Physics",
year = "2011",
volume = "11",
number = "23",
pages = "12137--12147",
note = "{Setores de Atividade: Pesquisa e desenvolvimento
cient{\'{\i}}fico.}",
keywords = "gravity-wave event, airglow emissions, 62-degrees s, bore event,
OH, climatology, atmosphere, campaign, station, region.",
abstract = "A mesospheric front was observed with an all-sky airglow imager on
the night of 9-10 July 2007 at Ferraz Station (62 degrees S, 58
degrees W), located on King George island on the Antarctic
Peninsula. The observed wave propagated from southwest to
northeast with a well defined wave front and a series of crests
behind the main front. The wave parameters were obtained via a 2-D
Fourier transform of the imager data providing a horizontal
wavelength of 33 km, an observed period of 6 min, and a horizontal
phase speed of 92ms(-1). Simultaneous mesospheric winds were
measured with a medium frequency (MF) radar at Rothera Station (68
degrees S, 68 degrees W) and temperature profiles were obtained
from the SABER instrument on the TIMED satellite. These wind and
temperature profiles were used to estimate the propagation
environment of the wave event. A wavelet technique was applied to
the wind in the plane of wave propagation at the OH emission
height spanning three days centered on the front event to define
the dominant periodicities. Results revealed a dominance of
near-inertial periods, and semi-diurnal and terdiurnal tides
suggesting that the ducting structure enabling mesospheric front
propagation occurred on large spatial scales. The observed tidal
motions were used to reconstruct the winds employing a
least-squares method, which were then compared to the observed
ducting environment. Results suggest an important contribution of
large-scale winds to the ducting structure, but with buoyancy
frequency variations in the vertical also expected to be
important. These results allow us to conclude that the wave front
event was supported by a duct including contributions from both
winds and temperature.",
doi = "10.5194/acp-11-12137-2011",
url = "http://dx.doi.org/10.5194/acp-11-12137-2011",
issn = "1680-7316",
label = "lattes: 2306964700488382 3 BagestonWrBaEFrGoAn:2011:ObMeFr",
language = "en",
targetfile = "Bageston-acpd-11-16185-206-2011[1].pdf",
urlaccessdate = "17 jun. 2024"
}