Shadoz—a Tropical Ozonesonde–radiosonde Network for the Atmospheric Community

Thompson, A. M.; Witte, J. C.; Oltmans, S. J.; Schmidlin, F. J.

doi:10.1175/bams-85-10-1549

Cited by 31 publications

(30 citation statements)

References 54 publications

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“…SHADOZ stations permitted the first detailed characterization of the zonal wave one, showing an ozone maximum localized in the middle upper troposphere of the Atlantic–African–western Indian Ocean region [ Thompson et al , 2003b, 2004]. The climatology presented by Thompson et al [2003b, 2004] was deficient in having only one near‐equatorial African station (Nairobi). More generally, SHADOZ stations are relatively remote from biomass burning emissions, a disadvantage for evaluating photochemical and radiative properties of various types of ozone profiles.…”

Section: Results With In Situ Mozaic and Shadoz Observationsmentioning

confidence: 99%

“…Completion of a southern African window with data from Luanda, Windhoek, Brazzaville and Irene, shows that the seasonal SON maximum is more pronounced than in the published views, largely because of new lower‐altitude features. Within the wave one, previously delineated with profiles from relatively unpolluted sites [ Thompson et al , 2003a, 2003b, 2004], the intensity of low‐altitude ozone is very strong in JJA and DJF, the maximum of Southern and Northern hemisphere biomass fire activity over Africa. These lower tropospheric ozone maxima have the same intensity, 65–75 ppbv, as those measured in the upper levels [e.g., Thompson et al , 2003a, Figure 4b].…”

Section: Discussionmentioning

confidence: 99%

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Enhanced view of the “tropical Atlantic ozone paradox” and “zonal wave one” from the in situ MOZAIC and SHADOZ data

Sauvage¹,

Thouret²,

Thompson³

et al. 2006

J. Geophys. Res.

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Ozone vertical profiles from the Measurements of Ozone from Airbus In‐service Aircraft (MOZAIC) program over Africa are used to complement pictures of the wave‐one pattern and the “tropical Atlantic paradox” identified through soundings in the Southern Hemisphere Additional Ozonesondes (SHADOZ) network. The Atlantic paradox refers to a greater tropospheric ozone column amount over the South Atlantic than the North Atlantic during the West African biomass burning season. SHADOZ and MOZAIC data from 1998–2002 and 1997–2004, respectively, are used to show that these two phenomena are linked. The combined data are used to address the following: Does the (continental) MOZAIC data modify the appearance of the paradox? Do lower tropospheric MOZAIC data lead to new conclusions about ozone in the wave‐one maximum region? During December, January, and February (DJF), the lower troposphere over Africa exhibits a higher ozone signal in the burning hemisphere, that is, north of the equator, so the “paradox” does not appear over the African continent. The MOZAIC data set over Africa highlights another component of the wave‐one feature when the tropospheric ozone mixing ratio is viewed in zonal cross section. The lower troposphere makes a nonnegligible contribution to the regionally higher ozone column during the biomass burning periods of each hemisphere (DJF) for West Africa and June, July, and August (JJA) for the central Africa region. A southern preference for the wave‐one character, previously deduced from satellite data, is confirmed with a stronger maximum in September, October, and November (SON). Both the paradox and wave‐one phenomena are consistent with a view that the African continent is a major source of biomass burning and lightning emissions.

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Section: Results With In Situ Mozaic and Shadoz Observationsmentioning

confidence: 99%

Section: Discussionmentioning

confidence: 99%

Enhanced view of the “tropical Atlantic ozone paradox” and “zonal wave one” from the in situ MOZAIC and SHADOZ data

Sauvage¹,

Thouret²,

Thompson³

et al. 2006

J. Geophys. Res.

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“…Whenever possible, the 500 km/12 hr criteria will be adopted, otherwise the 1000 km/24 hr criteria are used. It is noted that a significant fraction of these coincidences occur in the tropics, due largely to the existence of the SHADOZ (Southern Hemisphere Additional Ozonesonde) network and campaigns [24]. A map of all stations used in this study is given in Fig.…”

Section: Ozonesondesmentioning

confidence: 99%

An evaluation of Odin/OSIRIS limb pointing and stratospheric ozone through comparisons with ozonesondes

McLinden¹,

Fioletov²,

Haley³

et al. 2007

Can. J. Phys.

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Five-plus years of Odin/OSIRIS (Optical Spectrograph and Infrared Imager System) ozone profiles (version 3.0 and SaskMART) have been compared with coincident ozonesonde profiles from the tropopause to the middle stratosphere (∼10-35 km). The OSIRIS(v3.0)-sonde comparisons, together with the "knee" technique, suggest that OSIRIS pointing is stable with an accuracy (systematic uncertainty) of 100 m and a precision (random uncertainty) of 400 m. Comparison of coincident profiles revealed excellent overall agreement with differences generally not exceeding 10% between 10 and 35 km. During periods of satellite eclipse larger differences above 25 km were found and concluded to be the result of flexing of the spacecraft frame brought about by cooling. Uncertainties derived from the intercomparison suggest an OSIRIS precision of 25-30% at 10 km, reaching a minimum of about 4-6% in the middle-stratosphere (23-28 km), and 6-8% at 35 km. Ozonesonde uncertainties were also derived and found to be slightly larger in the tropics than mid-latitudes, possibly due to a lack of column normalization at some of the tropical stations. OSIRIS SaskMART ozone, an alternative ozone data product, was found to be very comparable with the v3.0 ozone, with slightly smaller biases relative to the ozonesondes. OSIRIS is concluded to be a robust and accurate source of stratospheric ozone profiles. PACS Nos.: 82.33.Tb, 95.75.Qr, 42.68.−w Résumé : Nous avons comparé cinq ans de mesures sur l'ozone faites par Odin/OSIRIS (version 3.0 et SaskMART) avec des mesures coincidentes par sonde ozonique (stations terrestres) prises entre la tropopause et la stratosphère moyenne (∼10-35 km), afin d'évaluer la capacité d'OSIRIS à mesurer l'ozone et à positionner ses mesures. Les comparaisons suggèrent que la précision de visée en altitude d'OSIRIS est stable, avec une fidélité

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“…OSIRIS provides a unique view, as there are few other sources of ozone profile data available in this region. In situ measurements are made by a tropical network of ozonesondes (Thompson et al 2004) and instrumentation installed on commercial aircraft (Marenco et al 1998). Likewise, profiles from the ACE satellite occultation mission (Bernath et al 2005) often extend below 10 km, but it, like the in situ instruments, cannot provide the same degree of coverage.…”

Section: Ata P R O D U C T S a N D S C I E N C E Applicationsmentioning

confidence: 99%

OSIRIS: A Decade of Scattered Light

McLinden

Bourassa

Brohede

et al. 2012

Bulletin of the American Meteorological Society

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It is the trace composition of the atmosphere that governs the chemistry of the lower and middle atmosphere and to a large extent the climate of our planet. Accurately determining the abundance of species such as ozone (~1 ppm), nitrogen dioxide (~1 ppb), or bromine monoxide (~1 ppt) presents a large challenge. Further determining how they vary in space and time on a global scale is even more daunting. A global view of the atmospheric trace gas and aerosol composition can only be achieved from space via remote sensing. Balloons, and later rockets, were the first  Into year 11 of a 2-yr mission, OSIRIS is redefining how limb-scattered sunlight can be used to probe the atmosphere, even into the upper troposphere.

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Shadoz—a Tropical Ozonesonde–radiosonde Network for the Atmospheric Community

Abstract: A new observing network reveals complexities of tropical ozone while providing an international model for climate-related data collection and public archiving.

Cited by 31 publications

References 54 publications

Enhanced view of the “tropical Atlantic ozone paradox” and “zonal wave one” from the in situ MOZAIC and SHADOZ data

Enhanced view of the “tropical Atlantic ozone paradox” and “zonal wave one” from the in situ MOZAIC and SHADOZ data

An evaluation of Odin/OSIRIS limb pointing and stratospheric ozone through comparisons with ozonesondes

OSIRIS: A Decade of Scattered Light

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