@Article{EgitoTakaMiyo:2017:EfPlWa,
author = "Egito, Fabio and Takahashi, Hisao and Miyoshi, Yasunobu",
affiliation = "{Universidade Federal do Oeste da Bahia} and {Instituto Nacional
de Pesquisas Espaciais (INPE)} and {Kyushu University}",
title = "Effects of the planetary waves on the MLT airglow",
journal = "Annales Geophysicae",
year = "2017",
volume = "35",
number = "5",
pages = "1023--1032",
month = "Aug.",
keywords = "Atmospheric composition and structure (airglow and aurora), middle
atmosphere, composition and chemistry, meteorology and atmospheric
dynamics, waves and tides.",
abstract = "The planetary-wave-induced airglow variability in the mesosphere
and lower thermosphere (MLT) is investigated using simulations
with the general circulation model (GCM) of Kyushu University. The
model capabilities enable us to simulate the MLT OI557.7 nm,
O(2)b(0-1), and OH(6-2) emissions. The simulations were performed
for the lowerboundary meteorological conditions of 2005. The
spectral analysis reveals that at middle latitudes, oscillations
of the emission rates with the period of 2-20 days appear
throughout the year. The 2-day oscillations are prominent in the
summer and the 5-, 10-, and 16-day oscillations dominate from the
autumn to spring equinoxes. The maximal amplitude of the
variations induced by the planetary waves was 34% in OI557.7 nm,
17% in O(2)b(0-1), and 8% in OH(6-2). The results were compared to
those observed in the middle latitudes. The GCM simulations also
enabled us to investigate vertical transport processes and their
effects on the emission layers. The vertical transport of atomic
oxygen exhibits similar periodic variations to those observed in
the emission layers induced by the planetary waves. The results
also show that the vertical advection of atomic oxygen due to the
wave motion is an important factor in the signatures of the
planetary waves in the emission rates.",
doi = "10.5194/angeo-35-1023-2017",
url = "http://dx.doi.org/10.5194/angeo-35-1023-2017",
issn = "0992-7689",
language = "en",
targetfile = "egito_effects.pdf",
urlaccessdate = "19 mar. 2024"
}