Coupled longitudinal and tidal variations of equatorial nightglow zenith emission rates from WINDII and Christmas Island data

Observations of OI 557.7 nm nightglow at Kolhapur (17° N), India

“…Recently, Liu et al (2008b) observed the nocturnal behaviour of this emission feature to exhibit minimum and maximum, and found the emission to be larger in the early morning hours than in the early night. Several other investigators have reported this type of nocturnal variation of OI 557.7 nm intensity (Takahashi et al, 1977(Takahashi et al, , 1989(Takahashi et al, , 1998Petitdidier and Teitelbaum, 1979;Oznovich et al, 1995;Shepherd and McLandress, 1995;Zhang et al, 1998;Wiens et al, 1999;Buriti et al, 2001). Although the earlier measurements correspond to different epochs and locations on the globe, it is interesting to note that the occurrence of minima noticed here is in par with earlier reports, and this speaks of the general behaviour of this emission feature globally during night.…”

“…Parihar et al: Observations of OI 557.7 nm nightglow at Kolhapur (17 • N), India emission intensity, being directly dependent on atomic oxygen, is expected to reflect the dynamical influence in the form of temporal variations. Since the 1980s, Takahashi et al (1977Takahashi et al ( , 1985Takahashi et al ( , 1989Takahashi et al ( , 1998, Teitelbaum (1977, 1979), Misawa and Takeuchi (1982), Yee and Abreu (1987), Oznovich et al (1995), Shepherd and McLandress (1995), Zhang et al (1998), Wiens et al (1999), and Buriti et al (2001) have reported the nocturnal behaviour of the oxygen green line emission. Fukuyama (1976), Petitdidier and Teitelbaum (1977), and Das and Sinha (2008) studied the effect of tidal dynamics on the intensity.…”