A model for the response of the atomic oxygen 557.7nm and the OH Meinel airglow to atmospheric gravity waves in a realistic atmosphere

Makhlouf, U. B.; Picard, R. H.; Winick, J. R.; Tuan, T. F.

doi:10.1029/97jd03082

Cited by 41 publications

(34 citation statements)

References 40 publications

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“…They do so by perturbing the atmospheric temperature and density, which in turn results in perturbations in the number density of radiating states and in radiance perturbations. This is true both for airglow emissions 6 ', 7 and for LTE and non-LTE thermal emissions.…”

Section: Atmospheric Gravity Wavesmentioning

confidence: 97%

“…The SPIRIT-3 radiometer, constructed by Utah State University's Space Dynamics Laboratory, has a focal plane array consisting of 192 elements in a column, covering a total angular extent of 7 argue that such structure is due to GWs near 40 km altitude and show how the wave structure is distinguished from cloud structure. In Figure 1,2 recorded over India (23N) on 2 October 1996 at a nadir angle of 610 for the bottom pixel, a single spherical ring pattern from a point source dominates the structure.…”

Section: 27mentioning

confidence: 99%

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Nonequilibrium radiative transfer in structured atmospheres

2002

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Public reporting burden for this cdolection of information is estimated to average 1 hour per response, including the time for reviewing instructions, searching existing data sources, gathering and maintaining the data needed, and completing and reviewing this cdlection of information. Send comments regarding this burden estimate or any other aspect of this collection of information, including suggestions for reducing this burden to Department of Defense, Washington Headquarters Services, Directorate for Information The nonequilibrium middle and upper atmosphere are very dynamic regions that are structured vertically and horizontally by the presence of persistent temperature inversion layers and by the passage of both atmospheric gravity waves and transient frontal disturbances or bores. The infrared emissions from this part of the atmosphere are already typically not in local thermodynamic equilibrium (LTE) and are further perturbed by the presence of this pervasive atmospheric structure. The inevitable result is highly structured atmospheric emissions that reflect the structure of the atmosphere. Understanding the structure of the atmosphere is essential to understanding the structure of the radiation that it emits. At the same time understanding how atmospheric structure perturbs atmospheric radiation provides a means to sense the perturbing atmospheric processes remotely. We examine methods to calculate the LTE / non-LTE radiative response to temporal and spatial variations of the atmosphere and give examples of applications. We also compare our results with existing field data. Finally, we discuss a proposed new NASA optical / infrared experiment (Waves Explorer) to sense atmospheric gravity waves remotely from earth orbit on a global basis and characterize their sources. AFRL-VS-HA-TR-2005-1115Non-equilibrium radiative transfer in structured atmospheres R. H. Picard*a, J. R. Winick*a, P. P. Wintersteiner**b aAir Force Research Laboratory; bARCON Corp. ABSTRACTThe nonequilibrium middle and upper atmosphere are very dynamic regions that are structured vertically and horizontally by the presence of persistent temperature inversion layers and by the passage of both atmospheric gravity waves and transient frontal disturbances or bores. The infrared emissions from this part of the atmosphere are already typically not in local thermodynamic equilibrium (LTE) and are further perturbed by the presence of this pervasive atmospheric structure. The inevitable result is highly structured atmospheric emissions that reflect the structure of the atmosphere. Understanding the structure of the atmosphere is essential to understanding the structure of the radiation that it emits. At the same time understanding how atmospheric structure perturbs atmospheric radiation provides a means to sense the perturbing atmospheric processes remotely. We examine methods to calculate the LTE / non-LTE radiative response to temporal and spatial variations of the atmosphere and give examples of applications. We also compare our results wit...

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Section: Atmospheric Gravity Wavesmentioning

confidence: 97%

Section: 27mentioning

confidence: 99%

Nonequilibrium radiative transfer in structured atmospheres

2002

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“…As noted by Snively et al (2010), the chemical response is faster than the wave perturbations and it is valid when the wave periods are much longer than the timescales of the chemical reactions. According to Makhlouf et al (1998), the hypothesis of photochemical equilibrium holds for the atomic and molecular oxygen. For the OH emissions, Liu and Swenson (2003) noted that such hypothesis was valid for waves with periods longer than 20 min.…”

Section: Airglow Simulationsmentioning

confidence: 99%

Effects of the planetary waves on the MLT airglow

2017

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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.

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“…When we study spatial and temporal variation of the airglow emission rates, it is essential to obtain information of these atmospheric parameters. Airglow climatology making use of recent atmospheric model and satellite data has been carried out with a some success (Makhlouf et al, 1998, Zhang et al, 2001. Lack of groundbased observation data, however, makes it difficult to advance the discussion further.…”

Section: Introductionmentioning

confidence: 99%

Atmospheric density and pressure inferred from the meteor diffusion coefficient and airglow O2b temperature in the MLT region

et al. 2014

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Atmospheric density and pressure in the upper mesosphere-lower thermosphere (MLT) region, around 90 km, are inferred from the meteor trail ambipolar diffusion coefficients, D, and simultaneously observed airglow O 2 b rotational temperatures. For the present study simultaneous observation data from the meteor radar and SATI imaging spectrometer taken at Shigaraki MU radar observatory (34.9• N, 136.1 • E) were used. From the 18 winter nights of data, it is observed that in most of the cases nocturnal variation of the O 2 temperature has a good correlation with D at 90 to 92 km. The inferred densities at 90 km showed a negative correlation with temperature variation, suggesting a constant pressure process. The O 2 emission intensity shows a good correlation with the temperature, and negative correlation with the density variation. The OH rotational temperature and D at 87 km also showed similar results to the case of the O 2 temperature.

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A model for the response of the atomic oxygen 557.7nm and the OH Meinel airglow to atmospheric gravity waves in a realistic atmosphere

Cited by 41 publications

References 40 publications

Nonequilibrium radiative transfer in structured atmospheres

Nonequilibrium radiative transfer in structured atmospheres

Effects of the planetary waves on the MLT airglow

Atmospheric density and pressure inferred from the meteor diffusion coefficient and airglow O2b temperature in the MLT region

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