European validation of SAGE II ozone profiles

Attmannspacher, W.; Noë, J. de La; Muer, D. De; Lenoble, J.; Mégie, G.; Pelon, Jacques; Pruvost, Pierre; Reiter, R.

doi:10.1029/jd094id06p08461

Cited by 24 publications

(14 citation statements)

References 10 publications

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“…The HALOE data are available at http://haloedata.larc.nasa.gov. Both SAGE and HALOE measurements have been extensively validated [ Ackerman et al , 1989; Attmannspacher et al , 1989; Cunnold et al , 1989, 1996; Gordley et al , 1996; Hervig et al , 1996; Newchurch et al , 1995; Oberbeck et al , 1989; Russell et al , 1996a, 1996b; Wang et al , 2002] and are widely accepted by the atmospheric community for studies of ozone trends [ Harris et al , 1998; WMO , 1994, 2003].…”

Section: Datamentioning

confidence: 99%

Attribution of recovery in lower‐stratospheric ozone

et al. 2006

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[1] Multiple satellite and ground-based observations provide consistent evidence that the thickness of Earth's protective ozone layer has stopped declining since 1997, close to the time of peak stratospheric halogen loading. Regression analyses with Effective Equivalent Stratospheric Chlorine (EESC) in conjunction with further analyses using more sophisticated photochemical model calculations constrained by satellite data demonstrate that the cessation of ozone depletion between 18 and 25 km altitude is consistent with a leveling off of stratospheric abundances of chlorine and bromine, due to the Montreal Protocol and its amendments. However, ozone increases in the lowest part of the stratosphere, from the tropopause to 18 km, account for about half of the improvement in total column ozone during the past 9 years at Northern Hemisphere midlatitudes. The increase in ozone for altitudes below 18 km is most likely driven by changes in transport, rather than driven by declining chlorine and bromine. Even with this evidence that the Montreal Protocol and its amendments are having the desired, positive effect on ozone above 18 km, total column ozone is recovering faster than expected because of the apparent transport driven changes at lower altitudes. Accurate prediction of future levels of stratospheric ozone will require comprehensive understanding of the factors that drive temporal changes at various altitudes and partitioning of the recent transport-driven increases between natural variability and changes in atmospheric structure perhaps related to anthropogenic climate change.

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Section: Datamentioning

confidence: 99%

Attribution of recovery in lower‐stratospheric ozone

et al. 2006

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“…Like HALOE, the instrument employs the solar occultation technique in the visible and near‐IR wavelength range to measure atmospheric aerosols, NO 2 , water vapor, and the ozone concentration in the stratosphere and mesosphere. The instrument and its validation are described in the work of Attmannspacher et al [1989] and Cunnold et al [1989].…”

Section: Validation Of Datamentioning

confidence: 99%

Validation of ground‐based observations of stratomesospheric ozone

et al. 2003

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Since January 1995, an ozone line at 110 GHz is observed with a ground‐based microwave radiometer at the Bordeaux Observatory, France (45°N), belonging to the Network for the Detection of Stratospheric Change (NDSC). Ozone profiles from 25 to 75 km are retrieved from the microwave emission spectra using the Optimal Estimation Method. Improvements on the data acquisition process and calibration procedure are presented. A comprehensive comparison with satellite (Halogen Occultation Experiment (HALOE), Microwave Limb Sounder (MLS), and Stratospheric Aerosol and Gas Experiment II (SAGE II)) and ground‐based instrument data (microwave radiometer in Bern, Switzerland, lidar at the Observatoire de Haute‐Provence, France) is given. The average profiles, using the statistically most significant data sets, deviate not more than 15% in the stratosphere and 30% in the mesosphere. We can thus assert that the Bordeaux radiometer is a well‐validated instrument providing consistent and high‐quality data.

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“…[15] The earliest SAGE II O 3 validation papers [Cunnold et al, 1989;Attmannspacher et al, 1989;Veiga et al, 1995] showed agreement between SAGE and correlative measurements of about 5 -10% in the stratosphere. Several years ago an improved retrieval version (5.96) was released and was used extensively in the most recent SPARC ozone trends assessment report [Harris et al, 1998].…”

Section: Sage Datamentioning

confidence: 99%

Validation of POAM III ozone: Comparisons with ozonesonde and satellite data

et al. 2003

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[1] This paper describes the validation of ozone profiles from the Polar Ozone and Aerosol Measurement (POAM) III instrument. POAM III O 3 is measured with 1-km vertical resolution throughout most of the stratosphere and random errors of $5%. It is shown that sunspots do not significantly affect the POAM O 3 retrievals, nor do polar stratospheric clouds, except under rarely encountered, extreme conditions of very low O 3 and exceptionally high aerosol extinction. A statistical analysis is presented of comparisons between coincident measurements from POAM III and ozonesondes, the Halogen Occultation Experiment (HALOE) and the Stratospheric Aerosol and Gas Experiment (SAGE) II. On average, POAM III O 3 profiles agree to within ±5% with these correlative data from 13 to 60 km. There is a suggestion that from 30 to 60 km POAM III sunrise data might be biased slightly low (<5%) relative to POAM sunset data. There is evidence that POAM III has a high bias of up to $0.1 ppmv from 10 to 12 km, and that this bias might stem, in part, from errors in the retrieval of aerosol extinction at 0.6 mm, the primary O 3 absorption wavelength in the POAM retrievals. Below 10 km the POAM III data agree with coincident sonde measurements to better than 0.05 ppmv on average, which can correspond to large relative differences of more than +30% at 8-9 km and À100% at 5 km. We conclude that the POAM III profiles are highly accurate and adequate for quantitative scientific studies.

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European validation of SAGE II ozone profiles

Cited by 24 publications

References 10 publications

Attribution of recovery in lower‐stratospheric ozone

Attribution of recovery in lower‐stratospheric ozone

Validation of ground‐based observations of stratomesospheric ozone

Validation of POAM III ozone: Comparisons with ozonesonde and satellite data

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