Mesopause temperatures and integrated band brightnesses calculated from airglow OH emissions recorded at Maynooth (53.2°N, 6.4°W) during 1993

Mulligan, F. J.; Horgan, D.F.; Galligan, J.G.; Griffin, E. M.

doi:10.1016/0021-9169(94)00133-9

Cited by 40 publications

(23 citation statements)

References 34 publications

Supporting

Mentioning

Contrasting

Unclassified

Order By: Relevance

“…The ground-based data used in this study, some of which have been reported already (Mulligan et al, 1995), were recorded at Maynooth (53.2 • N, 6.4 • W) over the two-year period 1993 to 1994. Since the Maynooth station did not record any data during the operational phase of either ACE-FTS or SABER, these two years were selected for the study because they have the highest number of individual measurements available, and they match very closely the timeframe in their phase of the solar cycle.…”

Section: Ground-based Oh*(3-1) Datamentioning

confidence: 99%

“…The P 1 (2), P 1 (3) and P 1 (4) lines in the (3,1) band in each spectrum were used to derive temperatures because they are among the most intense lines in the spectrum and are not affected to any significant extent by water vapour absorption (Turnbull and Lowe, 1983). Details of the temperature determination and the transition values used are given in Mulligan et al (1995).…”

Section: Ground-based Oh*(3-1) Datamentioning

confidence: 99%

See 1 more Smart Citation

OH-equivalent temperatures derived from ACE-FTS and SABER temperature profiles – a comparison with OH*(3-1) temperatures from Maynooth (53.2° N, 6.4° W)

Mulligan

Lowe

2008

Ann. Geophys.

View full text Add to dashboard Cite

Abstract. OH-equivalent temperatures were derived from all of the temperature profiles retrieved in 2004 and 2005 by the ACE-FTS instrument in a 5 degree band of latitude centred on a ground-based observing station at Maynooth. A globally averaged OH volume emission rate (VER) profile obtained from WINDII data was employed as a weighting function to compute the equivalent temperatures. The annual cycle of temperature thus produced was compared with the annual cycle of temperatures recorded at the ground-based station more than a decade earlier from the OH*(3-1) Meinel band. Both data sets showed excellent agreement in the absolute value of the temperature minimum (∼162 K) and in its time of occurrence in the annual cycle at summer solstice. Away from mid-summer, however, the temperatures diverged and reach a maximum disagreement of more than 20 K in mid-winter. Comparison of the Maynooth ground-based data with the corresponding results from two nearby stations in the same time-period indicated that the Maynooth data are consistent with other ground stations. The temperature difference between the satellite and ground-based datasets in winter was reduced to 14-15 K by lowering the peak altitude of the weighting function to 84 km. An unrealistically low peak altitude would be required, however, to bring temperatures derived from the satellite into agreement with the ground-based data.OH equivalent temperatures derived from the SABER instrument using the same weighting function produced results that agreed well with ACE-FTS. When the OH 1.6 µm VER profile measured by SABER was used as the weighting function, the OH equivalent temperatures increased in winter as expected but the summer temperatures were reduced resulting in an approximately constant offset of 8.6±0.8 K Correspondence to: F. J. Mulligan (frank.mulligan@nuim.ie) between ground and satellite values with the ground values higher. Variability in both the altitude and width of the OH layer within a discernable seasonal variation were responsible for the changes introduced. The higher temperatures in winter were due to primarily to the lower altitude of the OH layer, while the colder summer temperatures were due to a thinner summer OH layer. We are not aware of previous reports of the effect of the layer width on ground-based temperatures.Comparison of OH-equivalent temperatures derived from ACE-FTS and SABER temperature profiles with OH*(3-1) temperatures from Wuppertal at 51.3 • N which were measured during the same period showed a similar pattern to the Maynooth data from a decade earlier, but the warm offset of the ground values was lower at 4.5±0.5 K. This discrepancy between temperatures derived from ground-based instruments recording hydroxyl spectra and satellite borne instruments has been observed by other observers. Further work will be required by both the satellite and ground-based communities to identify the exact cause of this difference.

show abstract

Section: Ground-based Oh*(3-1) Datamentioning

confidence: 99%

Section: Ground-based Oh*(3-1) Datamentioning

confidence: 99%

OH-equivalent temperatures derived from ACE-FTS and SABER temperature profiles – a comparison with OH*(3-1) temperatures from Maynooth (53.2° N, 6.4° W)

Mulligan

Lowe

2008

Ann. Geophys.

View full text Add to dashboard Cite

show abstract

“…The OH (8,3) band nightglow observed by the AE satellite showed a strong semi-annual variation with the peak near the equinoxes [3]. Takahashi et al [4] and Mulligan et al [5] analyzed the OH nightglow intensities observed at Fortaleza (2.9°S, 38.4°W) and Maynooth (53.2°N, 6.4°W), respectively. The results indicated that the intensities at both stations showed an obvious semi-annual variation with the peak at the equinoxes and the valley at the solstices.…”

Section: Introductionmentioning

confidence: 97%

Global distributions of OH and O2 (1.27 μm) nightglow emissions observed by TIMED satellite

Gao

Chen

et al. 2011

Sci. China Technol. Sci.

View full text Add to dashboard Cite

In order to investigate the global distributions of temporal variations of OH and O 2 nightglow emissions, we statistically analyzed their variations with altitude, local time, and season, using the OH and O 2 airglow emission rate data observed by the TIMED satellite between 2002 and 2009. The results indicated that the OH nightglow emission was stronger than dayglow emission and the O 2 nightglow emission was weaker than dayglow emission. In the tropics, the OH nightglow intensity reached its maximum near midnight; at higher latitudes, the OH nightglow intensities after sunset and before sunrise were much strong. At the equinoxes, the O 2 nightglow intensity in the tropics decreased with local time; at the solstices, the local time-latitude distribution of the O 2 nightglow intensity had a valley (with weak emission). As for the altitude-latitude distributions of nightglow emission rates, the distribution for OH nightglow at the equinoxes had one peak (with strong emission) at the equator, with a peak height around 85 km; the peak for the March equinox was stronger than that for the September equinox. The distribution for O 2 nightglow at the equinoxes had three peaks, lying at 30° in the spring and autumn hemispheres and at the equator, and the peak height at the equator was the lowest. The distributions for both OH and O 2 nightglow emissions at the solstices had three peaks. Both nightglow intensities in the tropics had obvious annual and semi-annual variations, the peaks and valleys for semi-annual variations appeared near the equinoxes and solstices, respectively, and the peak at the March equinox was larger than that at the September equinox. The distributions of both OH and O 2 nightglow intensities showed a hemispheric asymmetry.

show abstract

“…After the discovery of the vibration-rotation of the OH Meinel system in the night airglow by Meinel (1950a), a great number of works have been devoted to the observation of the temporal variations of the emission rates and rotational temperatures of the OH Meinel bands (e.g. Shefov, 1969Shefov, , 1971aTakahashi et al, 1977;Mulligan et al, 1995). These measurements have shown a great variability for the different OH Meinel bands.…”

Section: Introductionmentioning

confidence: 99%

Seasonal variations of O<sub>2</sub> atmospheric and OH(6−2) airglowand temperature at mid-latitudes from SATI observations

et al. 2004

View full text Add to dashboard Cite

Abstract. More than 3 years of airglow observations with a Spectral Airglow Temperature Imager (SATI) installed at the Sierra Nevada Observatory (37.06 • N, 3.38 • W) at 2900 m height have been analyzed. Values of the column emission rate and vertically averaged temperature of the O 2 atmospheric (0-1) band and of the OH Meinel (6-2) band from 1998 to 2002 have been presented. From these observations a clear seasonal variation of both emission rates and rotational temperatures is inferred at this latitude. It is found that the annual variation of the temperatures is larger than the semiannual variation, while for the emission rates the amplitudes are comparable.

show abstract

Mesopause temperatures and integrated band brightnesses calculated from airglow OH emissions recorded at Maynooth (53.2°N, 6.4°W) during 1993

Cited by 40 publications

References 34 publications

OH-equivalent temperatures derived from ACE-FTS and SABER temperature profiles – a comparison with OH*(3-1) temperatures from Maynooth (53.2° N, 6.4° W)

OH-equivalent temperatures derived from ACE-FTS and SABER temperature profiles – a comparison with OH*(3-1) temperatures from Maynooth (53.2° N, 6.4° W)

Global distributions of OH and O2 (1.27 μm) nightglow emissions observed by TIMED satellite

Seasonal variations of O<sub>2</sub> atmospheric and OH(6−2) airglowand temperature at mid-latitudes from SATI observations

Contact Info

Product

Resources

About

Mesopause temperatures and integrated band brightnesses calculated from airglow OH emissions recorded at Maynooth (53.2°N, 6.4°W) during 1993

Cited by 40 publications

References 34 publications

OH-equivalent temperatures derived from ACE-FTS and SABER temperature profiles – a comparison with OH*(3-1) temperatures from Maynooth (53.2° N, 6.4° W)

OH-equivalent temperatures derived from ACE-FTS and SABER temperature profiles – a comparison with OH*(3-1) temperatures from Maynooth (53.2° N, 6.4° W)

Global distributions of OH and O2 (1.27 μm) nightglow emissions observed by TIMED satellite

Seasonal variations of O&lt;sub&gt;2&lt;/sub&gt; atmospheric and OH(6−2) airglowand temperature at mid-latitudes from SATI observations

Contact Info

Product

Resources

About

Seasonal variations of O<sub>2</sub> atmospheric and OH(6−2) airglowand temperature at mid-latitudes from SATI observations