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Validation of Odin/OSIRIS stratospheric NO2 profiles
- Source :
- Journal of Geophysical Research: Atmospheres, Journal of Geophysical Research: Atmospheres, American Geophysical Union, 2007, 112, pp.D07310. ⟨10.1029/2006JD007586⟩, Journal of Geophysical Research: Atmospheres, 2007, 112, pp.D07310. ⟨10.1029/2006JD007586⟩
- Publication Year :
- 2007
- Publisher :
- HAL CCSD, 2007.
-
Abstract
- This paper presents the validation study of stratospheric NO2 profiles retrieved from Odin/OSIRIS measurements of limb-scattered sunlight (version 2.4). The Optical Spectrograph and Infrared Imager System (OSIRIS) NO2 data set is compared to coincident solar occultation measurements by the Halogen Occultation Experiment (HALOE), Stratospheric Aerosol and Gas Experiment (SAGE) II, SAGE III, and Polar Ozone and Aerosol Measurement (POAM) III during the 2002–2004 period. Comparisons with seven Systeme d'Analyse par Observation Zenithal (SAOZ) balloon measurements are also presented. All comparisons show good agreement, with differences, both random and systematic, of less than 20% between 25 km and 35 km. Inconsistencies with SAGE III below 25 km are found to be caused primarily by diurnal effects from varying NO2 concentrations along the SAGE III line-of-sight. On the basis of the differences, the OSIRIS random uncertainty is estimated to be 16% between 15 km and 25 km, 6% between 25 km and 35 km, and 9% between 35 km and 40 km. The estimated systematic uncertainty is about 22% between 15 and 25 km, 11–21% between 25 km and 35 km, and 11–31% between 35 km and 40 km. The uncertainties for AM (sunrise) profiles are generally largest and systematic deviations are found to be larger at equatorial latitudes. The results of this validation study show that the OSIRIS NO2 profiles are well behaved, with reasonable uncertainty estimates between 15 km and 40 km. This unique NO2 data set, with more than hemispheric coverage and high vertical resolution will be of particular interest for studies of nitrogen chemistry in the middle atmosphere, which is closely linked to ozone depletion.
- Subjects :
- Atmospheric Science
010504 meteorology & atmospheric sciences
Soil Science
Aquatic Science
Oceanography
Atmospheric sciences
NO2
01 natural sciences
Occultation
010309 optics
Atmosphere
Geochemistry and Petrology
0103 physical sciences
Earth and Planetary Sciences (miscellaneous)
Sunrise
OSIRIS
Stratosphere
0105 earth and related environmental sciences
Earth-Surface Processes
Water Science and Technology
validation
[PHYS.PHYS.PHYS-AO-PH]Physics [physics]/Physics [physics]/Atmospheric and Oceanic Physics [physics.ao-ph]
Stratospheric Aerosol and Gas Experiment
Ecology
biology
Odin-OSIRIS
Paleontology
Forestry
biology.organism_classification
Ozone depletion
Geophysics
13. Climate action
Space and Planetary Science
Osiris
Subjects
Details
- Language :
- English
- ISSN :
- 2169897X and 21698996
- Database :
- OpenAIRE
- Journal :
- Journal of Geophysical Research: Atmospheres, Journal of Geophysical Research: Atmospheres, American Geophysical Union, 2007, 112, pp.D07310. ⟨10.1029/2006JD007586⟩, Journal of Geophysical Research: Atmospheres, 2007, 112, pp.D07310. ⟨10.1029/2006JD007586⟩
- Accession number :
- edsair.doi.dedup.....b583060b9a5da13bb3c3ac735b708143