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| Titel |
Retrieval of stratospheric aerosol size information from OSIRIS limb scattered sunlight spectra |
| VerfasserIn |
A. E. Bourassa, D. A. Degenstein, E. J. Llewellyn |
| Medientyp |
Artikel
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| Sprache |
Englisch
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| ISSN |
1680-7316
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| Digitales Dokument |
URL |
| Erschienen |
In: Atmospheric Chemistry and Physics ; 8, no. 21 ; Nr. 8, no. 21 (2008-11-06), S.6375-6380 |
| Datensatznummer |
250006435
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| Publikation (Nr.) |
 copernicus.org/acp-8-6375-2008.pdf |
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| Zusammenfassung |
| Recent work has shown that the retrieval of stratospheric aerosol
vertical profiles is possible using limb scattered sunlight
measurements at optical wavelengths. The aerosol number density
profile is retrieved for an assumed particle size distribution and
composition. This result can be used to derive the extinction at
the measured wavelength. However, large systematic error can result
from the uncertainty in the assumed size distribution when the
result is used to estimate the extinction at other wavelengths. It
is shown in this work that the addition of information obtained from
the near infrared limb radiance profile at 1530 nm measured by the
imaging module of the OSIRIS instrument yields an indication of the
aerosol size distribution profile that can be used to improve the
fidelity of the retrievals. A comparison of the estimated
extinction profile at 1020 nm with two coincident occultation
measurements demonstrates agreement to within approximately 15%
from 12 to 27 km altitude. |
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