Equatorial planetary wave signatures observed in mesospheric airglow emissions

被引:30
作者
Takahashi, H [1 ]
Buriti, RA
Gobbi, D
Batista, PP
机构
[1] INPE, Sao Jose Dos Campos, Brazil
[2] Univ Fed Paraiba, Campina Grande, PB, Brazil
关键词
equatorial airglow; planetary waves;
D O I
10.1016/S1364-6826(02)00040-8
中图分类号
P3 [地球物理学]; P59 [地球化学];
学科分类号
0708 ; 070902 ;
摘要
The upper mesospheric airglow emissions, OI 557.7 nm, NaD 589.3 nm, OH (6,2) and O-2 atmospheric (0,1) band have been measured using a ground-based multichannel airglow photometer in the equatorial region, Sao Joao do Cariri (7degreesS, 37degreesW), Brazil. Good weather condition made it possible to study nocturnal and day to day variation of the emission rates continuously for more than 12 days per month from January to December 1998. It is found that there are distinct 2- and 3.5-day period oscillations in the emission rates, those are most probably due to Rossby-gravity wave and Kelvin wave, respectively. The amplitudes of oscillation of the Kelvin wave are large in June and July, being 40% for OI 5577, 23% for O(2)b (0,1) and 26% for OH(6,2). (C) 2002 Elsevier Science Ltd. All rights reserved.
引用
收藏
页码:1263 / 1272
页数:10
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