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| Titel |
Stratospheric ozone parameterisation for seamless prediction systems |
| VerfasserIn |
Beatriz Monge-Sanz, Alessio Bozzo, Michail Diamantakis, Rossana Dragani, Johannes Flemming, Robin Hogan, Luke Jones, Linus Magnusson |
| Konferenz |
EGU General Assembly 2017
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| Medientyp |
Artikel
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| Sprache |
en
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| Digitales Dokument |
PDF |
| Erschienen |
In: GRA - Volume 19 (2017) |
| Datensatznummer |
250145493
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| Publikation (Nr.) |
 EGU/EGU2017-9439.pdf |
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| Zusammenfassung |
| A new stratospheric ozone parameterisation has been implemented in the ECMWF system
and tested for time scales that spread from medium-range to decadal. The new ozone
parameterisation was developed to provide a consistent treatment of both gas-phase and
heterogeneous chemistry, therefore offering a more realistic link with temperature than the
default ozone scheme used so far by ECMWF.
The stratospheric ozone distribution provided by the newly implemented parameterisation
compares very well to observations and full-chemistry models, even for unusual
meteorological conditions such as polar vortex split events. To assess the impact on, and
feedbacks with, meteorological variables, experiments have been performed with prognostic
ozone interactive with radiation.
Our results show that the new scheme provides a realistic ozone field able to improve the
description of the stratosphere in the ECMWF system; it has a positive impact on the
ECMWF model temperature field, reducing biases in the stratosphere. This study also
evaluates effects of the new scheme on forecast and predictability scores, we will show some
examples in which positive impacts on forecast scores also reach levels in the lower
troposphere. |
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