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Content archived on 2024-05-21

Towards the prediction of stratospheric ozone iii : the partitioning of the noy components

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Deliverables

The Southern Hemisphere Vortex split of Sep/Oct 2002: From ENVISAT MIPAS and SCIAMACHY spectral data of the period 18 Sep to 13 Oct global stratospheric temperature fields and trace gas distributions of the species O3, CH , N2O, HNO3, NO , NO, CFC-11, ClONO2, N2O5, and H2O were retrieved. The data sets show the split-up of the Southern polar vortex which is most pronounced on 25 to 27 Sep and its re-formation in October. Each data set is characterised by random error, vertical resolution, the number of independent data points per profile, a measure of the contribution of a priori knowledge to the data point presented. A detailled description can be found in the "http://www.imk.fzk.de/imk2/kasima/aktuelles/topoz-iii/deliverables/d1_3/" target="_blank" Deliverable Report 1.3 The Arctic Winter 2002/03 Under TOPOZ-III, vertical profiles of a number of atmospheric trace species and temperature/pressure were retrieved with the science-oriented MIPAS level-2 data processor developed at IMK and IAA. Vertical profiles of O3, NO2, BrO and OClO were retrieved with the scientific SCIAMACHY algorithms developed at UBRM. The retrievals are based on level 0 and level-1b data product provided by ESA. A detailed description can be found in the http://www.imk.fzk.de/imk2/kasima/aktuelles/topoz-iii/deliverables/d1_3/" target="_blank">Deliverable Report 1.3. The data is used within the project by partners of WP2. They validate and improve the chemical transport models by comparison of the ENVISAT data with model results. The main innovatives are the new quality and coverage of data of atmospheric trace constituents by ENVISAT.
The southern Hemisphere Vortex Split in Sep/Oct 2002 The simulation of southern hemisphere vortex split period by the partners running CTMs reveal that the split of the vortex is reproduced in all models as a result of the well described short-term dynamics in the ECMWF analyses. The four different CTMs (CLaMS, KASIMA, REPROBUS, SLIMCAT) show in general a similar distribution of long-lived tracers like CH4 but there are some remarkable differences. In the pressure-level models (KASIMA and REPROBUS) the upward transport of CH4 in the tropics seems to be stronger than in the models which uses the potential temperature as vertical co-ordinate (CLaMS and SLIMCAT). Together with the strongest vertical upward transport in the tropics the KASIMA model shows the strongest descent in the Antarctic polar vortex whereas CLaMS exhibits the weakest descent. For more details please refer to: http://www-imk.fzk.de/imk2/kasima/aktuelles/topoz-iii/deliverables/d2_2/" target="_blank" Deliverable report D2.2 The simulation of Arctic winter 2002/2003: The simulation of Arctic winter 2002/2003 by the partners running CTMs reveal that the vortex build up and break up is reproduced in all models as a result of the well described short-term dynamics in the ECMWF analyses. For more details please refer to the http://www-imk.fzk.de/imk2/kasima/aktuelles/topoz-iii/deliverables/d2_3/" target="_blank" Deliverable report D2.3
Prediction of the future development of the ozone layer within the next decades. Based on investigations carried out during the first two years of TOPOZ III (i.e., first assessment calculations of recent ozone changes employing state-of-the-art coupled chemistry-climate models (CCMs), evaluation of model results with observations and against each other, and further model improvements by implementing new parameterisations of relevant processes), new transient CCM simulations have been carried out in the last year of the project to provide best estimates of the further development of the ozone layer. A detailed description can be found from the http://www-imk.fzk.de/imk2/kasima/aktuelles/topoz-iii/deliverables/d3_3/" target="blank" Deliverable Report 3.3

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