Objective
The WAter Vapour Experiment (WAVE) proposal consists in a campaign of coordinated observations of stratospheric water vapour profiles provided by ground-based, balloon-, aircraft- and rocket-borne instruments in relationship with satellite data and model computations. This project takes place in the framework of the THird European Stratospheric Experiment on Ozone (THESEO) in winter 1998-1999. The main objective is to improve our understanding of the behaviour of atmospheric water vapour over the complete winter period:
1) inside and outside the Arctic polar vortex
2) at low, middle and high latitudes
3) from the lower stratosphere to the lower mesosphere.
Different processes involved in stratospheric water vapour chemistry and transport which will be addressed as scientific objectives are:
a) partitioning of stratospheric hydrogen by analysing all available data from remote and in-situ observations of 2 CH4 + H2O over the total observing period despite of the possible discrepancies of the different experimental techniques.
b) dynamics that can be identified by H2O measurements as
stratosphere-troposphere exchange, rehydration effects, the surf zone, high-low latitude coupling, but also stratospheric and mesospheric wave activity and their influence on polar vortex structure as subsidence, transport of vortex air or of filaments to mid-latitude regions.
c) large scale distribution of stratospheric water vapour to better understand transport processes in the stratosphere as in the lowermost stratosphere.
d) aerosol physics as PSC formation and dehydration, conditions of occurrence, subsidence in the polar vortex and descent rate of air.
e) photochemistry of the upper stratosphere-lower mesosphere ozone due to specific role of water vapour in the chemistry of this layer.
The involved means to reach such objectives are: ground-based stratospheric H2O microwave radiometers located in six sites from 80øN to 27øN, five balloon flights (three at Kiruna and two at mid-latitudes), one to two airborne flights with stratospheric H2O microwave radiometer measurements from the Arctic to the tropics and one rocket flight with a Lyman-a hygrometer, satellite measurements (GOME, ADEOS, Odin, ENVISAT, etc. ) and the contribution of external model computations. Measurement reduction and data analysis will be insured in co-ordination with other species and dynamical parameters. Data will be stored in the THESEO campaign database at NILU.
The scientific rationale of this WAVE proposal addresses the area 1.2.1 "Physics and chemistry of the atmosphere" and more specifically area 1.2.1.1 "Stratospheric chemistry and depletion of the ozone layer".
Fields of science (EuroSciVoc)
CORDIS classifies projects with EuroSciVoc, a multilingual taxonomy of fields of science, through a semi-automatic process based on NLP techniques. See: The European Science Vocabulary.
CORDIS classifies projects with EuroSciVoc, a multilingual taxonomy of fields of science, through a semi-automatic process based on NLP techniques. See: The European Science Vocabulary.
- natural sciences computer and information sciences data science
- natural sciences earth and related environmental sciences atmospheric sciences
- natural sciences computer and information sciences databases
- natural sciences chemical sciences physical chemistry photochemistry
- natural sciences earth and related environmental sciences environmental sciences ozone depletion
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Coordinator
33270 FLOIRAC
France
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