Odin/OSIRIS observations of stratospheric NO3 through sunrise and sunset
Item
Title (Dublin Core)
Odin/OSIRIS observations of stratospheric NO3 through sunrise and sunset
Description (Dublin Core)
The nitrate radical (NO<sub>3</sub>) has been detected in visible limb-scattered spectra measured by the Optical Spectrograph and InfraRed Imager System (OSIRIS) on-board the Odin satellite when observing at large solar zenith angles (91–97°). Apparent slant column densities of NO<sub>3</sub> at tangent heights between 10 and 45 km are derived via spectral fitting in the 610–680 nm window. Using observations from multiple scans spanning solar zenith angles of 91–97°, the rapid evolution of NO<sub>3</sub> through sunrise and sunset can be traced. Slant column densities are found to be generally consistent with those simulated using a radiative transfer model with coupled photochemistry. In addition, a strong dependence of NO<sub>3</sub> with temperature is observed. These results indicate that our current knowledge of NO<sub>3</sub> photochemistry is generally consistent with OSIRIS observations to within the limitations of the radiative transfer modeling. Furthermore, they reveal that OSIRIS possesses signal-to-noise sufficient to make useful measurements of scattered sunlight out to solar zenith angles of 91–97° and suggest the possibility of retrieving profile information for NO<sub>3</sub> and other species at large solar zenith angles.
Creator (Dublin Core)
McLinden, C. A.
Haley, C. S.
Date (Dublin Core)
2018-01-15
Type (Dublin Core)
Text
Format (Dublin Core)
application/pdf
Identifier (Dublin Core)
10.5194/acp-8-5529-2008
https://acp.copernicus.org/articles/8/5529/2008/
Source (Dublin Core)
eISSN: 1680-7324
Language (Dublin Core)
eng
