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Tropospheric water‐vapour and ozone cross‐sections in a zonal plane over the central equatorial Pacific Ocean

Tropospheric water‐vapour and ozone measurements, using calibrated balloon‐borne sensors, are reported from the Central Equatorial Pacific Experiment (CEPEX). the sensors were launched from the Research Vessel Vickers along 2°S latitude between 156°E (west of the international date line) and 155°W (east of the date line). These measurements are combined with those from water‐vapour sondes launched over the western Pacific warm pool, during the Coupled Ocean‐Atmosphere Response Experiment (TOGA‐COARE). Taking the two experiments CEPEX and TOGA‐COARE together, the sensors included frost‐point hygrometers, Humicap‐A Väisälä sondes, Humicap‐H Väisälä sondes and electrochemical ozone‐sondes. Taken together, the CEPEX and TOGA‐COARE data provide over 150 vertical profiles of water vapour within the troposphere in varied conditions of convective activity ranging from disturbed to suppressed. the primary motivation behind the present analyses is to understand the role of tropical deep convection in the vertical distribution of water‐vapour. With this in mind, the profiles have been analysed in relation to occasions of recent deep convection and occasions when convection was suppressed.