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| Titel |
Assimilation of stratospheric ozone in the chemical transport model STRATAQ |
| VerfasserIn |
B. Grassi, G. Redaelli, G. Visconti |
| Medientyp |
Artikel
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| Sprache |
Englisch
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| ISSN |
0992-7689
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| Digitales Dokument |
URL |
| Erschienen |
In: Annales Geophysicae ; 22, no. 8 ; Nr. 22, no. 8 (2004-09-07), S.2669-2678 |
| Datensatznummer |
250014955
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| Publikation (Nr.) |
 copernicus.org/angeo-22-2669-2004.pdf |
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| Zusammenfassung |
| We describe a sequential assimilation approach useful for assimilating tracer measurements
into a three-dimensional chemical transport model (CTM) of the stratosphere. The numerical code,
developed largely according to Kha00, uses parameterizations and simplifications
allowing assimilation of sparse observations and the simultaneous evaluation of
analysis errors, with reasonable computational requirements.
Assimilation parameters are set by using χ2 and OmF (Observation minus Forecast)
statistics.
The CTM used here is a high resolution three-dimensional model. It includes a
detailed chemical package and is driven by UKMO (United Kingdom Meteorological Office)
analyses.
We illustrate the method using assimilation of Upper Atmosphere Research
Satellite/Microwave Limb Sounder (UARS/MLS) ozone
observations for three weeks during the 1996
antarctic spring.
The comparison of results from the simulations with
TOMS (Total Ozone Mapping Spectrometer)
measurements
shows improved total ozone fields due to assimilation of MLS observations.
Moreover, the assimilation gives indications on a possible model weakness
in reproducing
polar ozone values during springtime. |
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