Validation of ozone profile retrievals derived from the OMPS LP version 2.5 algorithm against correlative satellite measurements

Kramarova, N. A.; Bhartia, P. K.; Jaross, Glen; Moy, L.; Xu, Philippe; Chen, Zhong; DeLand, Matthew T.; Froidevaux, L.; Livesey, N. J.; Degenstein, D. A.; Bourassa, A. E.; Walker, Kaley A.; Sheese, Patrick E.

doi:10.5194/amt-2017-431

Cited by 8 publications

(19 citation statements)

References 19 publications

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“…The relative bias is larger in the upper troposphere‐lower stratosphere (UTLS) where ozone mixing ratios are smaller. These differences between the OMPS‐LP and MLS ozone retrievals are consistent with those in Kramarova et al () (their Figures 8 and 9).…”

Section: Methodssupporting

confidence: 91%

“…The results presented here use an observation error in which the provided precision estimate is multiplied by a factor of 0.75, which produces a better agreement with independent data. We note that the reported precisions in version 2.5 OMPS‐LP retrievals (Kramarova et al, ) are larger than those in the previous versions and are likely to be overestimated. It is common in data assimilation to tune the observation errors to best fit the assimilated as well as independent data.…”

Section: Methodsmentioning

confidence: 56%

“…OMPS‐LP provides between about 2,200 and 2,500 UV and Vis profiles in the sunlit portion of the atmosphere per day. Extensive validation by Kramarova et al () found an agreement with independent satellite observations to within 10% between 18 and 42 km. Kramarova et al () also identified a positive drift in OMPS‐LP of approximately 0.5% per year compared to MLS and the Odin Optical Spectrograph and InfraRed Imaging System observations.…”

Section: Methodsmentioning

confidence: 57%

“…Extensive validation by Kramarova et al () found an agreement with independent satellite observations to within 10% between 18 and 42 km. Kramarova et al () also identified a positive drift in OMPS‐LP of approximately 0.5% per year compared to MLS and the Odin Optical Spectrograph and InfraRed Imaging System observations. The retrieved ozone number densities on a constant 1‐km altitude grid are converted to mixing ratio by volume using temperature data from the GEOS Forward Processing for Instrument Teams analysis, a product similar to MERRA‐2.…”

Section: Methodsmentioning

confidence: 57%

“…In most of the stratosphere the agreement is excellent in terms of both mean values and statistical distributions, providing a strong indication that even the simple adjustment scheme applied here will be sufficient to ensure continuity of the ozone record in future reanalyses that will use both these data sources. This result comes with a caveat: Kramarova et al () found that OMPS‐LP exhibits a positive altitude‐dependent drift with respect to other satellite data sets that are considered stable. The drift is generally within 1% per year but large enough to pose a problem for trend studies.…”

Section: Discussionmentioning

confidence: 94%

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Toward a Reanalysis of Stratospheric Ozone for Trend Studies: Assimilation of the Aura Microwave Limb Sounder and Ozone Mapping and Profiler Suite Limb Profiler Data

et al. 2020

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Compatibility of the stratospheric ozone profile data from the Ozone Mapping and Profiler Suite Limb Profiler (OMPS‐LP) and the Microwave Limb Sounder (MLS) is assessed in the context of a continuity requirement for future reanalyses. A methodology for the assimilation of OMPS‐LP data into the Goddard Earth Observing System data assimilation system with a stratospheric chemistry module is developed. It is demonstrated that a simple homogenization technique significantly reduces the bias between OMPS‐LP and MLS analyses. With the homogenization applied, the mean difference between the two analyses is within 3% and the difference standard deviation within 10%, consistent with the estimated uncertainties of the satellite ozone data. Larger differences are seen in the tropical lower stratosphere. The MLS and OMPS‐LP assimilation experiments agree very well with independent data from ozonesondes and the Atmospheric Chemistry Experiment Fourier Transform Spectrometer. Heterogeneous ozone depletion during polar spring in both hemispheres as well as ozone transport during the 2016 quasi‐biennial oscillation disruption event are realistically represented in both analyses. This work establishes a step toward achieving continuity of the post‐2004 ozone record in future reanalyses, necessary for trend and long‐term ozone variability studies, although further development is needed to address a drift in the OMPS‐LP ozone data.

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Section: Methodssupporting

confidence: 91%

Section: Methodsmentioning

confidence: 56%

Section: Methodsmentioning

confidence: 57%

Section: Methodsmentioning

confidence: 57%

Section: Discussionmentioning

confidence: 94%

See 3 more Smart Citations

Toward a Reanalysis of Stratospheric Ozone for Trend Studies: Assimilation of the Aura Microwave Limb Sounder and Ozone Mapping and Profiler Suite Limb Profiler Data

et al. 2020

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Validation of SAGE III/ISS Solar Occultation Ozone Products With Correlative Satellite and Ground‐Based Measurements

et al. 2020

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The Stratospheric Aerosol and Gas Experiment III on the International Space Station (SAGE III/ISS) was launched on 19 February 2017 and began routine operation in June 2017. The first 2 years of SAGE III/ISS (v5.1) solar occultation ozone data were evaluated by using correlative satellite and ground‐based measurements. Among the three (MES, AO3, and MLR) SAGE III/ISS retrieved solar ozone products, AO3 ozone shows the smallest bias and best precision, with mean biases less than 5% for altitudes ~15–55 km in the midlatitudes and ~20–55 km in the tropics. In the lower stratosphere and upper troposphere, AO3 ozone shows high biases that increase with decreasing altitudes and reach ~10% near the tropopause. Preliminary studies indicate that those high biases primarily result from the contributions of the oxygen dimer (O4) not being appropriately removed within the ozone channel. The precision of AO3 ozone is estimated to be ~3% for altitudes between 20 and 40 km. It degrades to ~10–15% in the lower mesosphere (~55 km) and ~20–30% near the tropopause. There could be an altitude registration error of ~100 m in the SAGE III/ISS auxiliary temperature and pressure profiles. This, however, does not affect retrieved ozone profiles in native number density on geometric altitude coordinates. In the upper stratosphere and lower mesosphere (~40–55 km), the SAGE III/ISS (and SAGE II) retrieved ozone values show sunrise/sunset differences of ~5–8%, which are almost twice as large as what was observed by other satellites or model predictions. This feature needs further study.

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Persistent extreme ultraviolet irradiance in Antarctica despite the ozone recovery onset

Cordero

Féron

Damiani

et al. 2022

Sci Rep

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Attributable to the Montreal Protocol, the most successful environmental treaty ever, human-made ozone-depleting substances are declining and the stratospheric Antarctic ozone layer is recovering. However, the Antarctic ozone hole continues to occur every year, with the severity of ozone loss strongly modulated by meteorological conditions. In late November and early December 2020, we measured at the northern tip of the Antarctic Peninsula the highest ultraviolet (UV) irradiances recorded in the Antarctic continent in more than two decades. On Dec. 2nd, the noon-time UV index on King George Island peaked at 14.3, very close to the largest UV index ever recorded in the continent. On Dec. 3rd, the erythemal daily dose at the same site was among the highest on Earth, only comparable to those recorded at high altitude sites in the Atacama Desert, near the Tropic of Capricorn. Here we show that, despite the Antarctic ozone recovery observed in early spring, the conditions that favor these extreme surface UV events persist in late spring, when the biologically effective UV radiation is more consequential. These conditions include long-lasting ozone holes (attributable to the polar vortex dynamics) that often bring ozone-depleted air over the Antarctic Peninsula in late spring. The fact that these conditions have been occurring at about the same frequency during the last two decades explains the persistence of extreme surface UV events in Antarctica.

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Validation of ozone profile retrievals derived from the OMPS LP version 2.5 algorithm against correlative satellite measurements

Cited by 8 publications

References 19 publications

Toward a Reanalysis of Stratospheric Ozone for Trend Studies: Assimilation of the Aura Microwave Limb Sounder and Ozone Mapping and Profiler Suite Limb Profiler Data

Toward a Reanalysis of Stratospheric Ozone for Trend Studies: Assimilation of the Aura Microwave Limb Sounder and Ozone Mapping and Profiler Suite Limb Profiler Data

Validation of SAGE III/ISS Solar Occultation Ozone Products With Correlative Satellite and Ground‐Based Measurements

Persistent extreme ultraviolet irradiance in Antarctica despite the ozone recovery onset

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