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| Titel |
A non-iterative linear retrieval for infrared high-resolution limb sounders |
| VerfasserIn |
L. Millán, A. Dudhia |
| Medientyp |
Artikel
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| Sprache |
Englisch
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| ISSN |
1867-1381
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| Digitales Dokument |
URL |
| Erschienen |
In: Atmospheric Measurement Techniques ; 6, no. 5 ; Nr. 6, no. 5 (2013-05-23), S.1381-1396 |
| Datensatznummer |
250017900
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| Publikation (Nr.) |
 copernicus.org/amt-6-1381-2013.pdf |
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| Zusammenfassung |
| Currently, most of the high-spectral-resolution infrared limb sounders use
subsets of the recorded spectra (microwindows) in their retrieval schemes to
reduce the computing time of rerunning the radiative transfer model. A fast
linear retrieval scheme is described which allows the whole spectral
signature of the target molecule to be used. We determine that pressure and
temperature retrievals can be treated linearly up to a 20% difference
between the atmospheric state and the linearisation point for a 3% error
margin and up to 10 K "difference" for a 3 K error margin near the
stratopause and less than 0.5 K elsewhere. Assuming perfect pT
knowledge, CH4 retrievals can be be treated linearly up to a 20% CH4
concentration "difference" for a 2% error margin. As an example, this
technique is implemented for the Michelson Interferometer for Passive
Atmospheric Sounding instrument, but it is applicable to any high-resolution
limb sounder. |
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