Theoretical validation of ground-based microwave ozone observations

Ricaud, P.; Brasseur, Guy; Brillet, J.; Noë, J. de La; Parisot, J. P.; Pirre, Michel

doi:10.1007/s00585-994-0664-5

Cited by 15 publications

(12 citation statements)

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“…At 3.14 hPa observed ozone shows a maximum around 16 h as a consequence of the production of odd oxygen through photolysis and the low [O]/[O 3 ] ratio. The peak to peak amplitude is around 5% which is in agreement with photochemical models [ Pallister and Tuck , 1983; Ricaud et al , 1994]. The SOMORA measurements confirm nicely the predictions of photochemical models about midstratospheric ozone.…”

Section: Observations During the First Cawses Campaignsupporting

confidence: 93%

Diurnal changes in middle atmospheric H₂O and O₃: Observations in the Alpine region and climate models

Haefele¹,

Hocke²,

Kämpfer³

et al. 2008

J. Geophys. Res.

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[1] In this paper we investigate daily variations in middle atmospheric water vapor and ozone based on data from two ground-based microwave radiometers located in the Alpine region of Europe. Temperature data are obtained from a lidar located near the two stations and from the SABER experiment on the TIMED satellite. This unique set of observations is complemented by three different three-dimensional (3-D) chemistry-climate models (Monitoring of Stratospheric Depletion of the Ozone Layer (MSDOL), Laboratoire de Météorologie Dynamique Reactive Processes Ruling the Ozone Budget in the Stratosphere (LMDz-REPROBUS), and Solar Climate Ozone Links (SOCOL)) and the 2-D atmospheric global-scale wave model (GSWM). The first part of the paper is focused on the first Climate and Weather of the Sun-Earth System (CAWSES) tidal campaign that consisted of a period of intensive measurements during September 2005. Variations in stratospheric water vapor are found to be in the order of 1% depending on altitude. Meridional advection of tidal nature is likely to be the dominant driving factor throughout the whole stratosphere, while vertical advection becomes more important in the mesosphere. Observed ozone variations in the upper stratosphere and lower mesosphere show amplitudes of several percent in accordance with photochemical models. Variations in lower stratospheric ozone are not solely governed by photochemistry but also by dynamics, with the temperature dependence of the photochemistry becoming more important. The second part presents an investigation of the seasonal dependence of daily variations. Models tend to underestimate the H 2 O diurnal amplitudes, especially during summer in the upper stratosphere. Good agreement between models and observations is found for ozone in the upper stratosphere, which reflects the fact that the O 3 daily variations are driven by the photochemistry that is well modeled.

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Section: Observations During the First Cawses Campaignsupporting

confidence: 93%

Diurnal changes in middle atmospheric H₂O and O₃: Observations in the Alpine region and climate models

Haefele¹,

Hocke²,

Kämpfer³

et al. 2008

J. Geophys. Res.

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“…Diurnal variations relative to its mean nighttime value from Fig. 3 are in a good agreement with the OD model by Ricaud et al (1994) up to 69 km altitudes, if we take into account the spatial resolution…”

Section: Methods Of Data Reductionsupporting

confidence: 74%

“…In recent, years, stratomesospheric ozone has been measured extensively by millimeterwave techniques by many investigators (for instance, Lobsiger and Kiinzi,1986;Zommerfelds et al,1989;Ricaud et al,1991;Parrish et al,1992;Connor et al, 1994;Solomonov et al, 1994;Kawabata et al, 1994, referred as Paper I hereafter; Ricaud et al, 1994), and these measurements are reviewed by de La Nod (1994).…”

Section: Introductionmentioning

confidence: 99%

Ground-Based Millimeterwave Measurements of Strato-Mesospheric Ozone.

Kawabata

Ogawa

Yonekura

1996

J. geomagn. geoelec

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“…Ground‐based radiometers provide ozone measurements with the best local time resolution [e.g., Haefele et al , 2008; Connor et al , 1994; Zommerfelds et al , 1989; Ricaud et al , 1994], while rocket‐borne photometers can also provide measurements at several local times over a day [ Lean , 1982]. Although the vertical resolution of ground‐based measurements can be relatively coarse, the researchers cited above have discussed and accounted for this issue in the retrieval process.…”

Section: Introductionmentioning

confidence: 99%

Ozone diurnal variations in the stratosphere and lower mesosphere, based on measurements from SABER on TIMED

et al. 2010

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[1] We report on derived results of global zonal mean ozone diurnal variations over 24 h of local solar time, based on satellite measurements from SABER on the Thermosphere Ionosphere Mesosphere Energetics and Dynamics (TIMED) satellite, with focus on the stratosphere and lower mesosphere. On a global scale, results in this altitude range are new. We had previously reported on ozone diurnal variations, but the focus was at higher altitudes, where the variations can be relatively large. In the stratosphere, there can be systematic diurnal variations on the order of a few percent, with multiple local maxima over a day, and these can exist down to altitudes of ∼31 hPa (∼24 km) and lower. At these altitudes, photochemistry is expected to be less effective, and dynamics (e.g., tides) can be more important. The diurnal variations also depend on latitude and season. As a function of altitude, for low latitudes at least, the ozone diurnal variations show a pattern of local-time phase progression such that beginning at ∼31 hPa the mixing ratios are smaller in the afternoon (compared to values at midnight), then (as the altitude increases) become mostly larger in the afternoon beginning from ∼10 to 4.6 hPa, revert back to intermediate afternoon values near 2.2, 1.5 hPa, and again return to lower daytime values at about 1 hPa, with this last trend continuing to higher altitudes in the mesosphere.

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Theoretical validation of ground-based microwave ozone observations

Cited by 15 publications

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Diurnal changes in middle atmospheric H₂O and O₃: Observations in the Alpine region and climate models

Diurnal changes in middle atmospheric H₂O and O₃: Observations in the Alpine region and climate models

Ground-Based Millimeterwave Measurements of Strato-Mesospheric Ozone.

Ozone diurnal variations in the stratosphere and lower mesosphere, based on measurements from SABER on TIMED

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Theoretical validation of ground-based microwave ozone observations

Cited by 15 publications

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Diurnal changes in middle atmospheric H2O and O3: Observations in the Alpine region and climate models

Diurnal changes in middle atmospheric H2O and O3: Observations in the Alpine region and climate models

Ground-Based Millimeterwave Measurements of Strato-Mesospheric Ozone.

Ozone diurnal variations in the stratosphere and lower mesosphere, based on measurements from SABER on TIMED

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Product

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Diurnal changes in middle atmospheric H₂O and O₃: Observations in the Alpine region and climate models

Diurnal changes in middle atmospheric H₂O and O₃: Observations in the Alpine region and climate models