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Airglow O2(1Σ) atmospheric band at 8645 Å and the rotational temperature observed at 23°S

1986; Elsevier BV; Volume: 34; Issue: 3 Linguagem: Inglês

10.1016/0032-0633(86)90135-2

1873-5088

H. Takahashi, Y. Sahai, P. P. Batista,

Atmospheric chemistry and aerosols

Regular observations of theO2(1Σ), 0–1) atmospheric band at 8645 Å [O2A(0, 1)] and the rotational temperature, together with the OH(9,4) band and OI 5577 Å airglow emissions, using multichannel tilting filter type photometers, have been carried out at Cachoeira Paulista (22.7°S, 45.0°W), Brazil, since February 1983. The O2A(0, 1) band intensities occasionally vary from 200 to 1000 R during a night. Covariations in nocturnal and seasonal variation with the OI 5577 A emission were observed. The temperatures determined from the P branch of the O2A(0, 1) band vary between 180 and 230 K. The amplitude of the nocturnal temperature variation is sometimes larger than that determined from the OH emission, and the phase of the variation, on some occasions, leads that of the OH.