Effect of deep convection on the tropical tropopause layer composition over the southwest Indian Ocean during austral summer

• Published in: Atmospheric chemistry and physics 2020-09, Vol.20 (17), p.10565-10586
• Main Authors: Evan, Stephanie, Brioude, Jerome, Rosenlof, Karen, Davis, Sean M, Vömel, Holger, Héron, Damien, Posny, Françoise, Metzger, Jean-Marc, Duflot, Valentin, Payen, Guillaume, Vérèmes, Hélène, Keckhut, Philippe, Cammas, Jean-Pierre
• Format: Article
• Language: English
• Subjects: Air masses; Anomalies; Atmospheric and Oceanic Physics; Balloons; Cirrus clouds; Clouds; Composition; Convection; Convective clouds; Cyclones; Emission measurements; Humidification; Humidity; Hurricanes; Hygrometers; Infrared imagery; Lidar; Lidar measurements; METEOSAT; Observatories; Oceans; Optical radar; Outflow; Ozone; Physics; Precipitation; Regions; Remote sensing; Stratosphere; Summer; Temperature; Tropical climate; Tropical cyclones; Tropical depressions; Tropical storms; Tropical tropopause; Tropopause; Troposphere; Water vapor; Water vapour; Weather forecasting
• ISSN: 1680-7324; 1680-7316; 1680-7324
• DOI: 10.5194/acp-20-10565-2020

Balloon-borne measurements of cryogenic frost-point hygrometer (CFH) water vapor, ozone and temperature and water vapor lidar measurements from the Maïdo Observatory on Réunion Island in the southwest Indian Ocean (SWIO) were used to study tropical cyclones' influence on tropical tropopause layer (TTL) composition. The balloon launches were specifically planned using a Lagrangian model and Meteosat-7 infrared images to sample the convective outflow from tropical storm (TS) Corentin on 25 January 2016 and tropical cyclone (TC) Enawo on 3 March 2017.