OPAL: Network for the Detection of Stratospheric Change ozone profiler assessment at Lauder, New Zealand 2. Intercomparison of revised results

McDermid, I. Stuart; Bergwerff, J. B.; Bodeker, G. E.; Boyd, I. S.; Brinksma, E. J.; Connor, B. J.; Farmer, R.; Gross, Michael R.; Kimvilakani, Patrick; Matthews, W. A.; McGee, Thomas J.; Ormel, F.T.; Parrish, A.; Singh, Upendra N.; Swart, D. P. J.; Tsou, J. J.

doi:10.1029/98jd02707

Cited by 20 publications

(17 citation statements)

References 9 publications

(3 reference statements)

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“…The types of spectral errors most commonly encountered tend to propagate into profile errors in the lower to middle stratosphere. Despite these challenges, the profiles of the Mauna Loa and Lauder instruments were found to agree with others to within < 5 % from ≈ 22 to 65 km during formal blind intercomparison campaigns involving several types of instruments (McDermid et al, 1998a, b;McPeters et al, 1999). Differences between the Bern (Studer et al, 2013) instrument and others mostly fall within ≈ 7 %, as do those at Payerne up to ≈ 50 km.…”

Section: Microwavementioning

confidence: 82%

Past changes in the vertical distribution of ozone – Part 1: Measurement techniques, uncertainties and availability

et al. 2014

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Abstract. Peak stratospheric chlorofluorocarbon (CFC) and other ozone depleting substance (ODS) concentrations were reached in the mid-to late 1990s. Detection and attribution of the expected recovery of the stratospheric ozone layer in an atmosphere with reduced ODSs as well as efforts to understand the evolution of stratospheric ozone in the presence of increasing greenhouse gases are key current research topics. These require a critical examination of the ozone changes with an accurate knowledge of the spatial (geographical and vertical) and temporal ozone response. For such an examination, it is vital that the quality of the measurements used be as high as possible and measurement uncertainties well quantified.

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Section: Microwavementioning

confidence: 82%

Past changes in the vertical distribution of ozone – Part 1: Measurement techniques, uncertainties and availability

et al. 2014

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“…This ensures their high quality measurements (e.g., McPeters et al, 1999;McDermid et al, 1998). Typical accuracies for stratospheric ozone lidar instruments are 2% for the 20 to 35 km region, and 5-10% for other altitudes (e.g., Keckhut et al, 2004).…”

Section: Lidarmentioning

confidence: 99%

Geophysical validation of SCIAMACHY Limb Ozone Profiles

et al. 2006

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Abstract.We discuss the quality of the two available SCIA-MACHY limb ozone profile products. They were retrieved with the University of Bremen IFE's algorithm version 1.61 (hereafter IFE), and the official ESA offline algorithm (hereafter OL) versions 2.4 and 2.5. The ozone profiles were compared to a suite of correlative measurements from groundbased lidar and microwave, sondes, SAGE II and SAGE III (Stratospheric Aerosol and Gas Experiment).To correct for the expected Envisat pointing errors, which have not been corrected implicitly in either of the algorithms, we applied a constant altitude shift of −1.5 km to the SCIA-MACHY ozone profiles.The IFE ozone profile data between 16 and 40 km are biased low by 3-6%. The average difference profiles have a typical standard deviation of 10% between 20 and 35 km.We show that more than 20% of the SCIAMACHY official ESA offline (OL) ozone profiles version 2.4 and 2.5 have unrealistic ozone values, most of these are north of 15 • S. The remaining OL profiles compare well to correlative instruments above 24 km. Between 20 and 24 km, they underestimate ozone by 15±5%.

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“…Cortesi et al: MIPAS ozone validation 4813 from 15 to 40 km. At 40-45 km and above, due to the rapid decrease in signal to noise ratio, the error bars increase and significant bias reaching 10% may exist (McDermid et al, 1998;Godin et al, 1999). Millimetre wave radiometers (MWR) operate night and day, providing ozone VMR integrated over typically 2 h (a few stations provide shorter integration time) from 20-25 to 70 km, with a vertical resolution of 8 to 12 km.…”

Section: Ozone Correlative Data Sets and Validation Strategymentioning

confidence: 99%

Geophysical validation of MIPAS-ENVISAT operational ozone data

Cortesi

Lambert²,

Clercq³

et al. 2007

Atmos. Chem. Phys.

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Abstract. The Michelson Interferometer for Passive Atmospheric Sounding (MIPAS), on-board the European ENVIronmental SATellite (ENVISAT) launched on 1 March 2002, is a middle infrared Fourier Transform spectrometer measuring the atmospheric emission spectrum in limb sounding geometry. The instrument is capable to retrieve the vertical distribution of temperature and trace gases, aiming at the study of climate and atmospheric chemistry and dynamics, and at applications to data assimilation and weather forecasting.Correspondence to: U. Cortesi (u.cortesi@ifac.cnr.it) MIPAS operated in its standard observation mode for approximately two years, from July 2002 to March 2004, with scans performed at nominal spectral resolution of 0.025 cm −1 and covering the altitude range from the mesosphere to the upper troposphere with relatively high vertical resolution (about 3 km in the stratosphere). Only reduced spectral resolution measurements have been performed subsequently. MIPAS data were re-processed by ESA using updated versions of the Instrument Processing Facility (IPF v4.61 and v4.62) (and, to a lesser extent, v4.62) O 3 VMR profiles and a comprehensive set of correlative data, including observations from ozone sondes, ground-based lidar, FTIR and microwave radiometers, remote-sensing and in situ instruments on-board stratospheric aircraft and balloons, concurrent satellite sensors and ozone fields assimilated by the European Center for Medium-range Weather Forecasting.A coordinated effort was carried out, using common criteria for the selection of individual validation data sets, and similar methods for the comparisons. This enabled merging the individual results from a variety of independent reference measurements of proven quality (i.e. well characterized error budget) into an overall evaluation of MIPAS O 3 data quality, having both statistical strength and the widest spatial and temporal coverage. Collocated measurements from ozone sondes and ground-based lidar and microwave radiometers of the Network for the Detection Atmospheric Composition Change (NDACC) were selected to carry out comparisons with time series of MIPAS O 3 partial columns and to identify groups of stations and time periods with a uniform pattern of ozone differences, that were subsequently used for a vertically resolved statistical analysis. The results of the comparison are classified according to synoptic and regional systems and to altitude intervals, showing a generally good agreement within the comparison error bars in the upper and middle stratosphere. Significant differences emerge in the lower stratosphere and are only partly explained by the larger contributions of horizontal and vertical smoothing differences and of collocation errors to the total uncertainty. Further results obtained from a purely statistical analysis of the same data set from NDACC ground-based lidar stations, as well as from additional ozone soundings at middle latitudes and from NDACC ground-based FTIR measurements, confirm the validity of MIPAS O 3 profil...

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OPAL: Network for the Detection of Stratospheric Change ozone profiler assessment at Lauder, New Zealand 2. Intercomparison of revised results

Abstract: Abstract. Following a blind intercomparison of ozone profiling instruments in the

Cited by 20 publications

References 9 publications

Past changes in the vertical distribution of ozone – Part 1: Measurement techniques, uncertainties and availability

Past changes in the vertical distribution of ozone – Part 1: Measurement techniques, uncertainties and availability

Geophysical validation of SCIAMACHY Limb Ozone Profiles

Geophysical validation of MIPAS-ENVISAT operational ozone data

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