Evaluation of ozonesondes, HALOE, SAGE II and III, Odin- OSIRIS and -SMR, and ENVISAT-GOMOS, -SCIAMACHY and -MIPAS ozone profiles in the tropics from SAOZ long duration balloon measurements in 2003 and 2004

Borchi, F.; Pommereau, Jean‐Pierre

doi:10.5194/acp-7-2671-2007

Cited by 32 publications

(37 citation statements)

References 45 publications

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“…This corresponds to the results of Meijer et al (2004), who found an overestimation of GO-MOS between 18 km and 21 km compared to ozonesondes in the tropical region, using GOPR v5.4b. This is consistent with Borchi et al (2007), who found an altitude limita- showing no altitude shift and a slight low ozone bias for GO-MOS of 1-2.5%. They reported a degradation of GOMOS performances in the stratosphere below 22 km.…”

Section: Resultssupporting

confidence: 80%

“…Moreover, the tropical stratosphere is a zone where ozone is created by sunlight and where significant changes are expected to occur. The tropical stratosphere is, however, a zone where it is difficult to measure ozone by satellite experiments, due to increased Rayleigh atmospheric attenuation, high altitude clouds, low temperature, high humidity and dense aerosols (Borchi et al, 2007). It is, therefore, essential to compare the few stations operating in the SHADOZ project with the performances of the stellar occultation instrument GOMOS.…”

Section: Introductionmentioning

confidence: 99%

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Climatology and comparison of ozone from ENVISAT/GOMOS and SHADOZ/balloon-sonde observations in the southern tropics

Mzé¹,

Hauchecorne

Benchérif³

et al. 2010

Atmos. Chem. Phys.

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Abstract. In this paper, the stellar occultation instrument GOMOS is compared with ozonesondes from the SHADOZ network. We only used nighttime O 3 profiles and selected 8 Southern Hemisphere stations. 7 years of GOMOS datasets (GOPR 6.0cf and IPF 5.0) and 11 years of balloon-sondes are used in this study. A monthly distribution of GOMOS O 3 mixing ratios was performed in the upper-troposphere and in the stratosphere (15-50 km). A comparison with SHADOZ was made in the altitude range between 15 km and 30 km.In the 21-30 km altitude range, a satisfactory agreement was observed between GOMOS and SHADOZ, although some differences were observed depending on the station. The range for monthly differences generally decreases with increasing height and is within ±15%. It was found that the agreement between GOMOS and SHADOZ declines below ∼20 km. The median differences are almost within ±5%, particularly above 23 km. But a large positive bias was found below 21 km, in comparison to SHADOZ.

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Section: Resultssupporting

confidence: 80%

Section: Introductionmentioning

confidence: 99%

Climatology and comparison of ozone from ENVISAT/GOMOS and SHADOZ/balloon-sonde observations in the southern tropics

Mzé¹,

Hauchecorne

Benchérif³

et al. 2010

Atmos. Chem. Phys.

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“…Even the observed ozone distribution seems probably less extended in altitude than the standard model by about 2 km, a very plausible situation because ozone variations are known to exist around the Earth in terms of both location and epoch (Millier et al 1979;Thomason & Taha 2003;Borchi & Pommereau 2007). There is no reason that the selected standard atmospheric model exactly corresponds to the Earth atmospheric conditions at the precise location over the observed Earth's limb.…”

Section: Broadband Signaturesmentioning

confidence: 97%

The Earth as an extrasolar transiting planet

Vidal‐Madjar

Arnold

Ehrenreich

et al. 2010

A&A

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Context. An important goal within the quest for detecting an Earth-like extrasolar planet, will be to identify atmospheric gaseous bio-signatures. Aims. Observations of the light transmitted through the Earth's atmosphere, as for an extrasolar planet, will be the first important step for future comparisons. We have completed observations of the Earth during a lunar eclipse, a unique situation similar to that of a transiting planet. We aim at showing what species could be detected in its atmosphere at optical wavelengths, where a lot of photons are available in the masked stellar light. Methods. We present observations of the 2008 August 16 Moon eclipse performed with the SOPHIE spectrograph at the Observatoire de Haute-Provence (France). Locating the spectrograph's fibers in the penumbra of the eclipse, the Moon irradiance is then a mix of direct, unabsorbed Sun light and solar light that has passed through the Earth's atmosphere. This mixture essentially reproduces what is recorded during the transit of an extrasolar planet. Results. We report here the clear detection of several Earth atmospheric compounds in the transmission spectra, such as ozone, molecular oxygen, and neutral sodium as well as molecular nitrogen and oxygen through the Rayleigh signature. Moreover, we present a method that allows us to derive the thickness of the atmosphere versus the wavelength for penumbra eclipse observations. We quantitatively evaluate the altitude at which the atmosphere becomes transparent for important species like molecular oxygen and ozone, two species thought to be tightly linked to the presence of life. Conclusions. The molecular detections presented here are an encouraging first attempt, necessary to better prepare for the future of extremely-large telescopes and transiting Earth-like planets. Instruments like SOPHIE will be mandatory when characterizing the atmospheres of transiting Earth-like planets from the ground and searching for bio-marker signatures.

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“…Accuracy is evaluated by adding a systematic error of 1.5% (uncertainty from the ozone absorption cross-sections) to the precision values. The SAOZ ozone profiles have been compared to a number of satellite and sonde observations and were found to be very consistent with the most accurate data available (Lumpe et al, 2003;Haley et al, 2004;Borchi and Pommereau, 2007). The three SAOZ flights used in this study were part of the African Monsoon Multidisciplinary Analysis (AMMA) balloon campaign (Redelsperger et al, 2006) maximum values between −40 and −60% at 16 km for all SAOZ profiles.…”

Section: Saoz-balloon Measurements In the Tropicsmentioning

confidence: 99%

Validation of ozone measurements from the Atmospheric Chemistry Experiment (ACE)

Dupuy¹,

Walker²,

Kar³

et al. 2009

Atmos. Chem. Phys.

Self Cite

144

126

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Abstract. This paper presents extensive bias determination analyses of ozone observations from the Atmospheric Chemistry Experiment (ACE) satellite instruments: the ACE Fourier Transform Spectrometer (ACE-FTS) and the Measurement of Aerosol Extinction in the Stratosphere and Troposphere Retrieved by Occultation (ACE-MAESTRO) instrument. Here we compare the latest ozone data products from ACE-FTS and ACE-MAESTRO with coincident observations from nearly 20 satellite-borne, airborne, balloonborne and ground-based instruments, by analysing volume mixing ratio profiles and partial column densities. The ACE-FTS version 2.2 Ozone Update product reports more ozone than most correlative measurements from the upper troposphere to the lower mesosphere. At altitude levels from 16 to 44 km, the average values of the mean relative differences are nearly all within +1 to +8%. At higher altitudes (45-60 km), the ACE-FTS ozone amounts are significantly larger than those of the comparison instruments, with mean relative differences of up to +40% (about +20% on average). For the ACE-MAESTRO version 1.2 ozone data product, mean relative differences are within ±10% (average values within ±6%) between 18 and 40 km for both the sunrise and sunset measurements. At higher altitudes (∼35-55 km), systematic biases of opposite sign are found between the ACE-MAESTRO sunrise and sunset observations. While ozone amounts derived from the ACE-MAESTRO sunrise occultation data are often smaller than the coincident observations (with mean relative differences down to −10%), the sunset occultation profiles for ACE-MAESTRO show results that are qualitatively similar to ACE-FTS, indicating a large positive bias (mean relative differences within +10 to +30%) in the 45-55 km altitude range. In contrast, there is no significant systematic difference in bias found for the ACE-FTS sunrise and sunset measurements.

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Evaluation of ozonesondes, HALOE, SAGE II and III, Odin- OSIRIS and -SMR, and ENVISAT-GOMOS, -SCIAMACHY and -MIPAS ozone profiles in the tropics from SAOZ long duration balloon measurements in 2003 and 2004

Cited by 32 publications

References 45 publications

Climatology and comparison of ozone from ENVISAT/GOMOS and SHADOZ/balloon-sonde observations in the southern tropics

Climatology and comparison of ozone from ENVISAT/GOMOS and SHADOZ/balloon-sonde observations in the southern tropics

The Earth as an extrasolar transiting planet

Validation of ozone measurements from the Atmospheric Chemistry Experiment (ACE)

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