Techniques for deriving Doppler temperatures from multiple-line Fabry–Perot profiles: an analysis

Conner, James F.; Smith, Roger W.; Hernández, G.

doi:10.1364/ao.32.004437

Cited by 12 publications

(6 citation statements)

References 5 publications

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“…This panel shows the residuals ‐expressed as a temperature‐ derived from the fitting of the single‐wavelength laser profiles against an ideal laser profile based on our knowledge of the instrumental constants. These residuals represent the presence of small misalignments, vibration, and the uncertainties in our knowledge of the instrumental parameters, and are used as a correction in the final data reduction (see Conner et al , 1993 for details). The correction is small (about 6 K) and consistent throughout the years of the observations.…”

Section: Resultsmentioning

confidence: 99%

Climatology of the upper mesosphere temperature above South Pole (90°S): Mesospheric cooling during 2002

Hernández

2003

Geophysical Research Letters

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Polar mesospheric temperature measurements obtained above South Pole from 1991 through 2002 are shown, and their long‐term behavior ‐climatology‐ has been deduced. The variation of this temperature during the polar night shows an annual amplitude of 14 K about the mean yearly value. A strong and highly significant correlation is found between the mean yearly temperature and the solar activity ‐expressed as the F10.7 flux‐, giving a 13 K change per 100 unit F10.7 change. The mean measured 2002 polar night temperatures are about 35 K cooler than the mean for the previous 11 years and well outside their excursions about this mean. This observed mesospheric cooling is in keeping with the disturbed lower atmosphere reported for this period. Other effects from the latter include both a smaller austral ozone depletion hole than has been recorded in previous years and higher than average minimum temperatures in the south polar region. The observed mesospheric cooling resembles the cooling observed at Northern midlatitudes during stratospheric warmings.

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Section: Resultsmentioning

confidence: 99%

Climatology of the upper mesosphere temperature above South Pole (90°S): Mesospheric cooling during 2002

Hernández

2003

Geophysical Research Letters

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“…Single photons were counted until the scan profiles had accumulated sufficient photon counts, typically requiring a few minutes per look direction. A frequency stabilized HeNe laser provided the calibration light enabling accurate tracking of instrumental contributions and any frequency drift from zero (Conner et al, 1993).…”

Section: Fabry-perot Interferometermentioning

confidence: 99%

Large‐Amplitude Mountain Waves in the Mesosphere Observed on 21 June 2014 During DEEPWAVE: 1. Wave Development, Scales, Momentum Fluxes, and Environmental Sensitivity

et al. 2019

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A remarkable, large‐amplitude, mountain wave (MW) breaking event was observed on the night of 21 June 2014 by ground‐based optical instruments operated on the New Zealand South Island during the Deep Propagating Gravity Wave Experiment (DEEPWAVE). Concurrent measurements of the MW structures, amplitudes, and background environment were made using an Advanced Mesospheric Temperature Mapper, a Rayleigh Lidar, an All‐Sky Imager, and a Fabry‐Perot Interferometer. The MW event was observed primarily in the OH airglow emission layer at an altitude of ~82 km, over an ~2‐hr interval (~10:30–12:30 UT), during strong eastward winds at the OH altitude and above, which weakened with time. The MWs displayed dominant horizontal wavelengths ranging from ~40 to 70 km and temperature perturbation amplitudes as large as ~35 K. The waves were characterized by an unusual, “saw‐tooth” pattern in the larger‐scale temperature field exhibiting narrow cold phases separating much broader warm phases with increasing temperatures toward the east, indicative of strong overturning and instability development. Estimates of the momentum fluxes during this event revealed a distinct periodicity (~25 min) with three well‐defined peaks ranging from ~600 to 800 m2/s2, among the largest ever inferred at these altitudes. These results suggest that MW forcing at small horizontal scales (<100 km) can play large roles in the momentum budget of the mesopause region when forcing and propagation conditions allow them to reach mesospheric altitudes with large amplitudes. A detailed analysis of the instability dynamics accompanying this breaking MW event is presented in a companion paper, Fritts et al. (2019, https://doi.org/10.1029/2019jd030899).

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“… Hernandez , 1978] and is also applicable to emission doublets [e.g. Connor et al , 1993] such as O + ( 2 P). Here we briefly describe the analysis procedure used for gas temperature extraction.…”

Section: Optical Data Analysismentioning

confidence: 99%

Novel Fabry‐Perot interferometer measurements of F‐region ion temperature

Cierpka

Kosch

Holma

et al. 2003

Geophysical Research Letters

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[1] Novel optical measurements of F-region ion temperatures have been made in conjunction with thermospheric neutral temperatures. A ground-based FabryPerot interferometer has been used to observe high-latitude Fregion ion temperatures using the O + ( 2 P) auroral emission at 732 nm, and upper-thermospheric neutral temperatures using the O( 1 D) airglow emission at 630 nm. Dual wavelength measurements were made during February 2001 and clearly show that the ion temperature is equal to or greater than the neutral temperature, as expected. EISCAT radar measurements show that there is good agreement between the incoherent scatter and optical Doppler broadening methods of inferring ion temperature.

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Techniques for deriving Doppler temperatures from multiple-line Fabry–Perot profiles: an analysis

Cited by 12 publications

References 5 publications

Climatology of the upper mesosphere temperature above South Pole (90°S): Mesospheric cooling during 2002

Climatology of the upper mesosphere temperature above South Pole (90°S): Mesospheric cooling during 2002

Large‐Amplitude Mountain Waves in the Mesosphere Observed on 21 June 2014 During DEEPWAVE: 1. Wave Development, Scales, Momentum Fluxes, and Environmental Sensitivity

Novel Fabry‐Perot interferometer measurements of F‐region ion temperature

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