Description of the long-term ozone data series obtained from different instrumental techniques at a single location: the Observatoire de Haute-Provence (43.9°N, 5.7°E)

Guirlet, M.; Keckhut, Philippe; Godin, S.; Mégie, G.

doi:10.1007/s00585-000-1325-y

Cited by 24 publications

(16 citation statements)

References 44 publications

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“…In the upper stratosphere ozone is in photochemical equilibrium while transport is controlling ozone below 30 km [ Danielsen , 1985]. This is consistent with observations of the ozone vertical distribution at midlatitudes showing an ozone annual maximum occurring in summer at levels higher than 25 km and in early spring at levels below 25 km [ Guirlet et al , 2000].…”

Section: Introductionsupporting

confidence: 78%

“…The vertical resolution of the OHP lidar measurements is altitude dependent and ranges from 0.5 km at 20 km to 2 km at 30 km and 4 km at 40 km. Their precision decreases from ±2% below 20 km to more than ±10% at 40 km and their accuracy is estimated to be on the order of ±3% [ Guirlet , 2000]. The microwave radiometer at Bern provides ozone profiles from 15 to 70 km with an altitude resolution of 10 to 15 km and a precision better than ±5% between 20 and 40 km [ Peter and Kämper , 1995].…”

Section: Retrieval Results For Ozone At the Jungfraujochmentioning

confidence: 99%

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Retrieval and characterization of ozone profiles from solar infrared spectra at the Jungfraujoch

2002

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[1] Vertical distributions of ozone from June 1996 to November 2000 have been retrieved from high-resolution Fourier transform infrared (FTIR) solar absorption spectra recorded at the primary Network for Detection of Stratospheric Change station of the Jungfraujoch in the Swiss Alps (46.5°N, 8°E, 3580 m above sea level (asl). The retrievals were performed using the Optimal Estimation Method (OEM), both in a narrow spectral interval (1002.567-1003.2 cm À1 ) and in a broad spectral interval (1000.0-1005.0 cm À1 ) in the O 3 9.6-mm band. A thorough characterization of the retrievals has been performed following the lines of OEM, including an information content analysis, a study of the correlations between retrieved instrumental parameters and retrieved ozone concentrations, and an evaluation of the O 3 profile error budget. It is demonstrated that the information content is significantly higher for spectra in the broad microwindow, resulting in higher vertical resolutions, on the order of 8 km, of the retrieved profiles extending up to 40 km, and less correlations between retrieved parameters. An independent statistical verification of the retrieval results and their characterization has been performed by comparison of the FTIR ozone profiles with independent measurements. These are the ozone profile measurements from balloon soundings at Payerne, from the microwave radiometer at Bern and the lidar at Observatoire de HauteProvence (OHP), and the total column data from the Dobson spectrophotometer at Arosa. Applying the optimum retrieval procedure in the broad spectral interval, an excellent agreement has been found between the FTIR O 3 profile data and the correlative data. The largest offset of the FTIR data in comparison with the correlative data is found with respect to the lidar data in the 24-to 40-km layer, and is on the order of 5%. No systematic biases have been found in the troposphere, neither in the upper troposphere-lower stratosphere (UTLS) up to 18 km. The dispersion of the relative differences between the data sets, if any, is never larger than half of the natural ozone variability.

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Section: Introductionsupporting

confidence: 78%

Section: Retrieval Results For Ozone At the Jungfraujochmentioning

confidence: 99%

Retrieval and characterization of ozone profiles from solar infrared spectra at the Jungfraujoch

2002

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“…Since 1994, the technique has been modified to observe ozone between 12 and 45 km. These measurements of upper stratospheric ozone compare well with other techniques and have likewise been used to estimate trends [ Guirlet et al , 2000].…”

Section: Data and Analysismentioning

confidence: 94%

Interannual changes of temperature and ozone: Relationship between the lower and upper stratosphere

et al. 2002

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[1] Changes of stratospheric dynamical structure and ozone are investigated in observations of the lower stratosphere, from meteorological analyses and Total Ozone Mapping Spectrometer (TOMS) ozone, and in contemporaneous observations of the upper stratosphere and mesosphere, from the French lidar at Observatoire de Haute-Provence (OHP). Interannual changes in the lower stratosphere are shown to be accompanied by coherent changes in the upper stratosphere and mesosphere. Over the 1980s and 1990s, both operate coherently with anomalous forcing of the residual mean circulation. Changes of temperature and ozone at OHP have sign and structure consistent with interannual changes of meridional transport. They reflect a poleward expansion and contraction of warm ozone-rich air, compensated by opposite changes of the polar-night vortex.

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“…Lidar observations below 25 km are almost excluded for the period 1991-1993 because of aerosol contamination due to Mount Pinatubo volcanic eruption (Guirlet et al, 2000). Umkehr measurements are highly sensitive to aerosols and thus the data from June 1991 to June 1993, affected by the Mount Pinatubo eruption, are omitted from the analysis as suggested by SPARC (1998).…”

Section: Selection Criteriamentioning

confidence: 99%

Coherence of long-term stratospheric ozone vertical distribution time series used for the study of ozone recovery at a northern mid-latitude station

Nair

Godin‐Beekmann

Pazmiño³

et al. 2011

Atmos. Chem. Phys.

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Abstract. The coherence of stratospheric ozone time series retrieved from various observational records is investigated at Haute-Provence Observatory • N, 5.71 • E). The analysis is accomplished through the intercomparison of collocated ozone measurements of Light Detection and Ranging (lidar) with Solar Backscatter UltraViolet(/2) (SBUV(/2)), Stratospheric Aerosol and Gas Experiment II (SAGE II), Halogen Occultation Experiment (HALOE), Microwave Limb Sounder (MLS) on Upper Atmosphere Research Satellite (UARS) and Aura and Global Ozone Monitoring by Occultation of Stars (GOMOS) satellite observations as well as with in situ ozonesondes and ground-based Umkehr measurements performed at OHP. A detailed statistical study of the relative differences of ozone observations over the whole stratosphere is performed to detect any specific drift in the data. On average, all instruments show their best agreement with lidar at 20-40 km, where deviations are within ±5 %. Discrepancies are somewhat higher below 20 and above 40 km. The agreement with SAGE II data is remarkable since average differences are within ±1 % at 17-41 km. In contrast, Umkehr data underestimate systematically the lidar measurements in the whole stratosphere with a near zero bias at 16-8 hPa (∼30 km). Drifts are estimated using simple linear regression for the data sets analysed in this study, from the monthly averaged difference time series. The derived values are less than ±0.5 % yr −1 in the 20-40 km altitude range and most drifts are not significant at the 2σ level. We also discuss the possibilities of extending the SAGE II and HALOE data with the GOMOS and Aura MLS data in Correspondence to: P. J. Nair (gopalapi@aero.jussieu.fr) consideration with relative offsets and drifts since the combination of such data sets are likely to be used for the study of stratospheric ozone recovery in the future.

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Description of the long-term ozone data series obtained from different instrumental techniques at a single location: the Observatoire de Haute-Provence (43.9°N, 5.7°E)

Cited by 24 publications

References 44 publications

Retrieval and characterization of ozone profiles from solar infrared spectra at the Jungfraujoch

Retrieval and characterization of ozone profiles from solar infrared spectra at the Jungfraujoch

Interannual changes of temperature and ozone: Relationship between the lower and upper stratosphere

Coherence of long-term stratospheric ozone vertical distribution time series used for the study of ozone recovery at a northern mid-latitude station

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