CIRRIS‐1A limb spectral measurements of mesospheric 9.6‐µm airglow and ozone

Zhou, Daniel K.; Mlynczak, M. G.; Bingham, Gail E.; Wise, J. O.; Nadile, R. M.

doi:10.1029/98gl00236

Cited by 16 publications

(12 citation statements)

References 17 publications

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“…Rawlins et al [1985] derived a statistical vibrational distribution which decreases with excitation. This approach was used by Mlynczak and Drayson [1990a] (Simple Single Model), Fichet et al [1992], and Zhou et al [1998]; (2) An ''inverse Rawlins distribution'' (F. J. Martín-Torres et al, manuscript in preparation, 2002), which assumes that the whole manifold of vibrational states below the energy dissociation limit are populated after recombination and favors the population of the higher vibrational states.…”

Section: Non-lte Processesmentioning

confidence: 99%

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Satellite observations of daytime and nighttime ozone in the mesosphere and lower thermosphere

et al. 2003

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[1] The global distribution of mesospheric and lower thermospheric ozone 9.6 mm infrared emissions was measured by the Cryogenic Infrared Spectrometers and Telescopes for the Atmosphere (CRISTA) experiment during two Space Shuttle missions in November 1994 and August 1997. The radiances measured by CRISTA have been inverted to O 3 number densities in the 50-95 km range by using a nonlocal thermodynamic equilibrium model. A detailed sensitivity study of retrieved O 3 number densities has been carried out. The ozone abundance profiles show volume mixing ratios of 1-2 ppmv at the stratopause, 0.5 ppmv or less around 80 km, and typically 1 ppmv during daytime and 10 ppmv during nighttime at the secondary maximum. The agreement with other experiments is typically better than 25%. The global distribution of upper mesospheric ozone shows significant latitudinal gradients and an enhancement in the equatorial upper mesosphere. At the polar night terminator a third ozone maximum is observed. Three-dimensional model results indicate that the latitudinal gradients are significantly influenced by solar tides.

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Section: Non-lte Processesmentioning

confidence: 99%

“…Several rocket borne measurements of mesospheric ozone infrared emissions have been performed [e.g., Rawlins et al, 1985;Green et al, 1986;Grossmann and Vollmann, 1997]. Global upper mesospheric ozone infrared emission measurements have been analyzed by Zhou et al [1998] and Mill et al [1994].…”

Section: Introductionmentioning

confidence: 99%

Satellite observations of daytime and nighttime ozone in the mesosphere and lower thermosphere

et al. 2003

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“…Figure 1 presents examples of the height distribution of the O 3 concentration in the mesosphere during daytime, obtained from measurements and as a result of theoretical studies. Measurements show substantial diurnal variations at mesospheric altitudes with maximum concentrations at nighttime and a secondary peak above 80 km (Llewellyn and Witt, 1977;Weeks et al, 1972Weeks et al, , 1978Wilson and Schwartz, 1981;Ulwick et al, 1987;Zommerfields et al, 1989;Zhou et al, 1998;Sandor et al, 1997;Gumbel et al, 1998;Fussen et al, 2000;Kaufmann et al, 2003;Polyakov et al, 2005;Kyrölä et al, 2006).…”

Section: Height Profiles Of Ozone In the Mesospherementioning

confidence: 99%

The influence of ozone concentration on the lower ionosphere – modelling and measurements during the 29–30 October 2003 solar proton event

2009

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Abstract.A numerical model of D-region ion chemistry is used to study the influence of the ozone concentration in the mesosphere on ion-composition and electron density during solar proton events (SPE). We find a strong sensitivity in the lower part of the D-region, where negative ions play a major role in the ionization balance. We have chosen the strong SPE on 29-30 October 2003 when very intense proton fluxes with a hard energetic spectrum were observed. Deep penetration into the atmosphere by the proton fluxes and strong ionisation allows us to use measurements of electron density, made by the EISCAT 224 MHz radar, starting from as low as 55 km. We compare the electron density profiles with model results to determine which ozone concentration profiles are the most appropriate for mesospheric altitudes under SPE conditions. We show that, during daytime, an ozone profile corresponding to depletion by a factor of 2 compared to minimum model concentrations for quiet conditions (Rodrigo et al., 1986), is needed to give model electron density profiles consistent with observations. Simple incorporation of minor neutral constituent profiles (NO, O and O 3 ) appropriate for SPE conditions into ion-chemistry models will allow more accurate modeling of electron and ion densities during such events, without the need to apply a complete chemical model calculating all neutral species.

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“…Calibrating FIRST required addressing basic issues of absolute radiometric response, frequency scale, instrument line shape, phase alignment and self-apodization. Techniques for quantifying and modeling these effects were applied to FIRST 10,11,12,13,14,15 during its calibration. For Earth scene calibration, FIRST utilized the same calibration scheme adopted by the NPOESS Cross Track Infrared Sounder (CrIS) sensor with calibration information from space view (cold BB) and then the warm flight blackbody.…”

Section: First Calibrationmentioning

confidence: 99%

Far infrared spectroscopy of the troposphere (FIRST): flight performance and data processing

et al. 2006

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The radiative balance of the troposphere, and hence global climate, is dominated by the infrared absorption and emission of water vapor, particularly at far-infrared (far-IR) wavelengths from 15-50 µm. Current and planned satellites observe the infrared region to about 15.4 µm, ignoring spectral measurement of the far-IR region from 15 to 100µm. The far-infrared spectroscopy of the troposphere (FIRST) project, flown in June 2005, provided a balloon-based demonstration of the two key technologies required for a space-based far-IR spectral sensor. We discuss the FIRST Fourier transform spectrometer system (0.6 cm -1 unapodized resolution), its radiometric calibration in the spectral range from 10 to 100 µm, and its performance and science data from the flight. Two primary and two secondary goals are given and data presented to show the goals were achieved by the FIRST flight.

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CIRRIS‐1A limb spectral measurements of mesospheric 9.6‐µm airglow and ozone

Cited by 16 publications

References 17 publications

Satellite observations of daytime and nighttime ozone in the mesosphere and lower thermosphere

Satellite observations of daytime and nighttime ozone in the mesosphere and lower thermosphere

The influence of ozone concentration on the lower ionosphere – modelling and measurements during the 29–30 October 2003 solar proton event

Far infrared spectroscopy of the troposphere (FIRST): flight performance and data processing

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