Scientific objectives
The primary scientific questions that we will answer are summarized as follows:
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Chemistry : Characterization of the chemical state in different geophysical conditions
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Chlorine: Diurnal variation, partitioning and budget
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What is the equilibrium constant between ClO and its dimer ClOOCl and is the
ClOCl photolysis in accord with laboratory data?
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How important is the ClO-dimer cycle for ozone depletion?
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Bromine: Diurnal variation, partitioning and budget, trends by linking to previous measurements
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What is the Brx budget and trend?
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Are atmospheric observations of bromine species and OClO in accord with the
recommended photolysis rate of BrONO2 and the branching ratios of the
ClO+BrO reaction?
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What are the consequences for the speed of the catalytic ClO/BrO ozone depletion
cycle?
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Nitrogen oxides:
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What is the rate of de/renitrification?
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Dynamics : Characterization of the dynamical state in different geophysical conditions
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Dynamical evolution in the climate change context
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What is this evolution of tracer-tracer correlations from vortex conditions
to springtime?
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Is there an acceleration of the Brewer Dobson circulation?
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Fast transport, filamentation and mixing
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What is the time evolution of turbulent diffusivity?
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What is the link between tropical and polar region during springtime?
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Cross comparisons
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What is the consistency of the spectroscopic parameters used in different spectral windows?
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What is the consistency of in situ versus remote sensing measurements?
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Validation
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Validation of T, O3, N2O, CH4, H2O,
NO, NO3, NO2, HNO3, ClONO2, BrO, OClO
measured on ENVISAT platform from MIPAS, SCIAMACHY and GOMOS instruments.