References

ACP

Atmospheric Chemistry and Physics

ACP

Atmos. Chem. Phys.

1680-7324

Copernicus Publications

Göttingen, Germany

10.5194/acp-7-5745-2007

Data assimilation of stratospheric constituents: a review

Lahoz

W. A.

¹ ⁴ Errera

² Swinbank

³ Fonteyn

² ⁵

Data Assimilation Research Centre, University of Reading, UK

BIRA-IASB, Brussels, Belgium

Met Office, Exeter, UK

now at: Norsk Institutt for Luftforskning, NILU, Norway

now at: Belgian Federal Science Office, Belgium

21 11 2007

7 22 5745 5773

2007

This work is licensed under the Creative Commons Attribution-NonCommercial-ShareAlike 2.5 Generic License. To view a copy of this licence, visit https://creativecommons.org/licenses/by-nc-sa/2.5/

This article is available from https://acp.copernicus.org/articles/7/5745/2007/acp-7-5745-2007.html

The full text article is available as a PDF file from https://acp.copernicus.org/articles/7/5745/2007/acp-7-5745-2007.pdf

The data assimilation of stratospheric constituents is reviewed. Several data assimilation methods are introduced, with particular consideration to their application to stratospheric constituent measurements. Differences from meteorological data assimilation are outlined. Historically, two approaches have been used to carry out constituent assimilation. One approach has carried constituent assimilation out as part of a Numerical Weather Prediction system; the other has carried it out in a standalone chemical model, often with a more sophisticated representation of chemical processes. Whereas the aim of the Numerical Weather Prediction approach has been to improve weather forecasts, the aims of the chemical model approach have included providing chemical forecasts and analyses of chemical constituents. A range of constituent assimilation systems developed in these two areas is presented and strengths and weaknesses discussed. The use of stratospheric constituent data assimilation to evaluate models, observations and analyses, and to provide analyses of constituents, monitor ozone, and make ozone forecasts is discussed. Finally, the current state of affairs is assessed, future directions are discussed, and potential key drivers identified.

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