Technical Note: Validation of Odin/SMR limb observations of ozone, comparisons with  OSIRIS, POAM III, ground-based and balloon-borne instruments

Jégou, Fabrice; Urbán, J.; Noë, J. de La; Ricaud, Philippe; Flochmoën, É. Le; Murtagh, Donal; Eriksson, Patrick; Jones, A.; Petelina, S. V.; Llewellyn, E. J.; Lloyd, N. D.; Haley, C. S.; Lumpe, J. D.; Randall, C. E.; Bevilacqua, R. M.; Catoire, Valéry; Huret, Nathalie; Berthet, Gwenaël; Renard, Jean‐Baptiste; Strong, Kimberly; Davies, J.; Elroy, C.T. Mc; Goutail, Florence; Pommereau, Jean‐Pierre

doi:10.5194/acp-8-3385-2008

Cited by 29 publications

(23 citation statements)

References 68 publications

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“…Since they are derived from a relatively weak spectral line, individual ozone profiles are quite noisy but averages agree reasonably well with correlative measurements (e.g., Dupuy et al, 2009;Jégou et al, 2008;Jones et al, 2007).…”

Section: Smrmentioning

confidence: 61%

Harmonized dataset of ozone profiles from satellite limb and occultation measurements

Sofieva

Rahpoe

Tamminen

et al. 2013

Earth Syst. Sci. Data

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Abstract. In this paper, we present a HARMonized dataset of OZone profiles (HARMOZ) based on limb and occultation measurements from Envisat (GOMOS, MIPAS and SCIAMACHY), Odin (OSIRIS, SMR) and SCISAT (ACE-FTS) satellite instruments. These measurements provide high-vertical-resolution ozone profiles covering the altitude range from the upper troposphere up to the mesosphere in years [2001][2002][2003][2004][2005][2006][2007][2008][2009][2010][2011][2012]. HARMOZ has been created in the framework of the European Space Agency Climate Change Initiative project.The harmonized dataset consists of original retrieved ozone profiles from each instrument, which are screened for invalid data by the instrument teams. While the original ozone profiles are presented in different units and on different vertical grids, the harmonized dataset is given on a common pressure grid in netCDF (network common data form)-4 format. The pressure grid corresponds to vertical sampling of ∼ 1 km below 20 km and 2-3 km above 20 km. The vertical range of the ozone profiles is specific for each instrument, thus all information contained in the original data is preserved. Provided altitude and temperature profiles allow the representation of ozone profiles in number density or mixing ratio on a pressure or altitude vertical grid. Geolocation, uncertainty estimates and vertical resolution are provided for each profile. For each instrument, optional parameters, which are related to the data quality, are also included.For convenience of users, tables of biases between each pair of instruments for each month, as well as bias uncertainties, are provided. These tables characterize the data consistency and can be used in various bias and drift analyses, which are needed, for instance, for combining several datasets to obtain a long-term climate dataset.This user-friendly dataset can be interesting and useful for various analyses and applications, such as data merging, data validation, assimilation and scientific research.The dataset is available at

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Section: Smrmentioning

confidence: 61%

Harmonized dataset of ozone profiles from satellite limb and occultation measurements

Sofieva

Rahpoe

Tamminen

et al. 2013

Earth Syst. Sci. Data

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“…Recently, v3.0 data were validated against Odin/SMR, POAM III, balloon-borne and ground-based instruments. An overall low bias of the York retrievals, generally of about −15% (−0.3 to −0.7 ppmv depending on the altitude), was found in the range 10-35 km Jégou et al, 2008). The second OSIRIS ozone retrieval algorithm, SaskMART, is developed and maintained at the University of Saskatchewan (Saskatoon, Canada).…”

Section: Odin/osirismentioning

confidence: 99%

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

Dupuy¹,

Walker²,

Kar³

et al. 2009

Atmos. Chem. Phys.

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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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“…As this version of TM5 only contains tropospheric chemistry, observational constraints are applied in the stratosphere for species such as CH 4 and O 3 (Huijnen et al, 2010). We also adopt new boundary conditions for HNO 3 based on the HNO 3 / O 3 ratios derived using latitudinal climatologies assembled from measurements by the ODIN instrument between 2001 and 2009 (Jégou et al, 2008;Urban et al, 2009), where instantaneous forcing is applied at 10 hPa. This provides a more realistic seasonal evolution of HNO 3 in the stratosphere when compared to that simulated when using the Upper Atmosphere Research Satellite (UARS) climatology in previous versions (Huijnen et al, 2010;Williams et al, 2012), especially in the polar regions.…”

Section: The Tm5 Modelmentioning

confidence: 99%

The impact of the chemical production of methyl nitrate from the NO + CH<sub>3</sub>O<sub>2</sub> reaction on the global distributions of alkyl nitrates, nitrogen oxides and tropospheric ozone: a global modelling study

et al. 2014

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Abstract. The formation, abundance and distribution of organic nitrates are relevant for determining the production efficiency and resident mixing ratios of tropospheric ozone (O 3 ) on both regional and global scales. Here we investigate the effect of applying the recently measured direct chemical production of methyl nitrate (CH 3 ONO 2 ) during NO x recycling involving the methyl-peroxy radical on the global tropospheric distribution of CH 3 ONO 2 and the perturbations introduced towards tropospheric NO x and O 3 using the TM5 global chemistry transport model. By comparisons against numerous observations, we show that the global surface distribution of CH 3 ONO 2 can be largely explained by introducing the chemical production mechanism using a branching ratio of 0.3 %, when assuming a direct oceanic emission source of ∼ 0.15 Tg N yr −1 . On a global scale, the chemical production of CH 3 ONO 2 converts 1 Tg N yr −1 from nitrogen oxide for this branching ratio. The resident mixing ratios of CH 3 ONO 2 are found to be highly sensitive to the dry deposition velocity that is prescribed, where more than 50 % of the direct oceanic emission is lost near the source regions, thereby mitigating the subsequent effects due to long-range and convective transport out of the source region. For the higher alkyl nitrates (RONO 2 ) we find improvements in the simulated distribution near the surface in the tropics (10 • S-10 • N) when introducing direct oceanic emissions equal to ∼ 0.17 Tg N yr −1 . In terms of the vertical profile of CH 3 ONO 2 , there are persistent overestimations in the free troposphere and underestimations in the upper troposphere across a wide range of latitudes and longitudes when compared against data from measurement campaigns. This suggests either a missing transport pathway or source/sink term, although measurements show significant variability in resident mixing ratios at high altitudes at global scale. For the vertical profile of RONO 2 , TM5 performs better at tropical latitudes than at mid-latitudes, with similar features in the comparisons to those for CH 3 ONO 2 . Comparisons of CH 3 ONO 2 with a wide range of surface measurements shows that further constraints are necessary regarding the variability in the deposition terms for different land surfaces in order to improve on the comparisons presented here. For total reactive nitrogen (NO y ) ∼ 20 % originates from alkyl nitrates in the tropics and subtropics, where the introduction of both direct oceanic emissions and the chemical formation mechanism of CH 3 ONO 2 only makes a ∼ 5 % contribution to the total alkyl nitrate content in the upper troposphere when compared with aircraft observations. We find that the increases in tropospheric O 3 that occur due oxidation of CH 3 ONO 2 originating from direct oceanic emission is negated when accounting for the chemical formation of CH 3 ONO 2 , meaning that the impact of such oceanic emissions on atmospheric lifetimes becomes marginal when a branching ratio of 0.3 % is adopted.

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Technical Note: Validation of Odin/SMR limb observations of ozone, comparisons with OSIRIS, POAM III, ground-based and balloon-borne instruments

Cited by 29 publications

References 68 publications

Harmonized dataset of ozone profiles from satellite limb and occultation measurements

Harmonized dataset of ozone profiles from satellite limb and occultation measurements

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

The impact of the chemical production of methyl nitrate from the NO + CH<sub>3</sub>O<sub>2</sub> reaction on the global distributions of alkyl nitrates, nitrogen oxides and tropospheric ozone: a global modelling study

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Technical Note: Validation of Odin/SMR limb observations of ozone, comparisons with OSIRIS, POAM III, ground-based and balloon-borne instruments

Cited by 29 publications

References 68 publications

Harmonized dataset of ozone profiles from satellite limb and occultation measurements

Harmonized dataset of ozone profiles from satellite limb and occultation measurements

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

The impact of the chemical production of methyl nitrate from the NO + CH&lt;sub&gt;3&lt;/sub&gt;O&lt;sub&gt;2&lt;/sub&gt; reaction on the global distributions of alkyl nitrates, nitrogen oxides and tropospheric ozone: a global modelling study

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The impact of the chemical production of methyl nitrate from the NO + CH<sub>3</sub>O<sub>2</sub> reaction on the global distributions of alkyl nitrates, nitrogen oxides and tropospheric ozone: a global modelling study