Rocket measurements of the altitude distributions of the hydroxyl airglow

Baker, Doran J.; Stair, A. T.

doi:10.1088/0031-8949/37/4/021

Cited by 312 publications

(289 citation statements)

References 24 publications

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“…A description of this procedure, as applied to narrow angle data, is given by Hapgood and Taylor [1982]. To correct for geometrical distortion arising from nonparallel lines of sight in the image itself, the outline of prominent wave crests in each image was traced and mapped onto the ground, assuming a centroid emission altitude of 87 km for the OH emission [Baker and Stair, 1988], 90 km for the Na emission [Greer and Best, 1967], and 94 km for the 02 and 96 km for the OI (557.7 nm) emissions [Offermann and Drescher, 1973]. For each wave event, measurements from a time series of images and maps were used to determine the mean horizontal wavelength, observed phase speed, and predominant direction of motion (usually determined to within an accuracy of _+5ø).…”

Section: Imaging Gravity Wavesmentioning

confidence: 99%

Observational evidence of wave ducting and evanescence in the mesosphere

Isler¹,

Taylor²,

Fritts³

1997

J. Geophys. Res.

129

142

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These results suggest that ducted waves are relatively common in the upper mesosphere and lower thermosphere region, at least over the mid-Pacific Ocean. As small-scale waves which are ducted have the potential to travel much longer horizontal distances than freely propagating waves, the frequency of their occurrence should be taken into account in efforts to quantify gravity wave effects at these altitudes.

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Section: Imaging Gravity Wavesmentioning

confidence: 99%

Observational evidence of wave ducting and evanescence in the mesosphere

Isler¹,

Taylor²,

Fritts³

1997

J. Geophys. Res.

129

142

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“…Mesopause temperatures are not only of interest because they represent the coldest part of the atmosphere, but there are indications that tropospheric warming by enhanced greenhouse effects may lead to a coolCorrespondence to: J. L. Innis (john.innis@aad.gov.au) ing of the upper mesosphere (Roble and Dickinson, 1989;Hauchecorne et al, 1991;Golitsyn et al, 1996). The hydroxyl emissions we are concerned with come from a mean height near 87 km, with a thickness of 8 km (Baker and Stair, 1988). The hydroxyl molecule shows a complex rotationalband spectrum, allowing the determination of temperatures by measuring the intensity distribution between various lines in the bands.…”

Section: Introductionmentioning

confidence: 99%

Mesospheric temperatures from observations of the hydroxyl (6–2) emission above Davis, Antarctica: A comparison of rotational and Doppler measurements

et al. 2001

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Abstract. We present observations of the hydroxyl (6-2) airglow lines from ∼87 km altitude obtained at Davis station, Antarctica, in the austral winter of 1999. Nine nights of observations were made of the P-branch near λ840 nm with a Czerny-Turner scanning spectrometer (CTS); at the same time, high-resolution Fabry-Perot Spectrometer (FPS) spectra were collected of the Q 1 (1) doublet at λ834 nm. Rotational temperatures were determined from the CTS observations, while Doppler temperatures were derived from the line-widths of the FPS Q 1 (1) spectra. Absolute temperatures determined by these methods are uncertain by ∼2 and ∼20 K, respectively. For the comparison we set the value of the reflective finesse of the FPS at λ834 nm so the mean FPS temperature from one night of simultaneous data was equal to that from the CTS, and then looked at the measured variations in each data set for the other eight nights. Both instruments show the upper mesosphere temperature to vary in a similar manner to within the observational errors of the measurements, implying an equivalence of the rotational and Doppler temperatures. We believe that this is the first published simultaneous, same-site, comparison of rotational and Doppler temperatures from the OH emission.

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“…[12] A statistical study of many rocket measurements [Baker and Stair, 1988] shows the OH airglow layer mean altitude to be 87 ± 3 km with a layer thickness of 9 ± 3 km. The altitude of the riometer observations is largely dependent upon the causative mechanism for the prevailing vertical electron concentration profile.…”

Section: Discussionmentioning

confidence: 99%

Utilizing riometry to observe gravity waves in the sunlit mesosphere

Jarvis

Hibbins

Taylor

et al. 2003

Geophysical Research Letters

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[1] The novel use of imaging riometers to observe mesospheric gravity waves is described. Imaging riometers respond to changes in the absorption of cosmic radio noise in the ionospheric D-region which enables them to detect the compression and rarefaction of the atmosphere at $90 km altitude generated by the passage of gravity waves. A considerable advantage of this method is that, unlike conventional techniques which rely on imaging faint optical emissions from the airglow layer at $87 km altitude, riometers remain operative under daylit, moonlit or cloudy conditions. This is particularly important for research into gravity wave forcing of mesospheric temperature at polar latitudes in summer when continuous 24-hour daylight prevails. An example in which the same wave event is characterized in colocated airglow imager and imaging riometer shows good agreement between the two instruments.

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Rocket measurements of the altitude distributions of the hydroxyl airglow

Cited by 312 publications

References 24 publications

Observational evidence of wave ducting and evanescence in the mesosphere

Observational evidence of wave ducting and evanescence in the mesosphere

Mesospheric temperatures from observations of the hydroxyl (6–2) emission above Davis, Antarctica: A comparison of rotational and Doppler measurements

Utilizing riometry to observe gravity waves in the sunlit mesosphere

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