Estudo de ondas de gravidade através da aeroluminescência das moléculas O2(0,1) e OH(6,2) / Study of atmospheric gravity waves via airglow of O2 (0,1) and OH (6,2) molecules

AUTOR(ES)
DATA DE PUBLICAÇÃO

2007

RESUMO

A study of intensity and temperature variabilities of airglow layers caused by gravity wave perturbations was a main subject of this work. The Krassovsky n parameter, defined as n = |n|e-i(I), was used to investigate the amplitude and phase of periodic variations of the molecular oxygen (O2(0,1)) and hydroxyl (OH(6,2)) emissions during the night. The data set was obtained by photometer measurements at Rikubetsu (43.5°N,143.8°E), Japan, from March 2004 to August 2005, a total of around 280 nights, under collaboration with STEL (Solar-Terrestrial Environment Laboratory), Nagoya University. The Lomb Scargle peridogram was used to analyze data series of O2 and OH, and predominant periods, wave amplitudes and phases dierences between intensity and temperature were calculated. The results showed |n| = 5,3 +- 1,7 e I = -40,2° +- 30,6° for emission, and |n| = 8,0 +- 4,7 e I = -41,9° +- 41,4°. The n values obtained from the O2 emission showed a good agreement with the data presented by the other workers. A large amount of n values of the OH emission, on the other hand, showed the values larger than 10, which has not been reported previously. However, a model presented by Schubert et al. (1991) predicts n larger than 10 for the gravity wave with horizontal wavelenghts around 100 km.

ASSUNTO(S)

masosfera mesosphere space geophysics parâmetro n de krassovsky aeroluminescência atmosférica krassovsky s n parameter espectro imageador ondas de gravidade imaging spectrometer gravity waves geofÍsica espacial airglow

ACESSO AO ARTIGO

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