title: An instrumented station for the survey of ozone and climate change in the southern tropics.
abstract: The assessment of changes induced by human activities on Earth atmospheric composition and thus on global climate requires a long-term and regular survey of the stratospheric and tropospheric atmospheric layers. The objective of this paper is to describe the atmospheric observations performed continuously at Reunion Island (55.5 degrees east, 20.8 degrees south) for 15 years. The various instruments contributing to the systematic observations are described as well as the measured parameters, the accuracy and the database. The LiDAR systems give profiles of temperature, aerosols and ozone in the troposphere and stratosphere, probes give profiles of temperature, ozone and relative humidity, radiometers and spectrometers give stratospheric and tropospheric integrated columns of a variety of atmospheric trace gases. Data are included in international networks, and used for satellite validation. Moreover, some scientific activities for which this station offers exceptional opportunities are highlighted, especially air mass exchanges nearby dynamical barriers: (1) On the vertical scale through the tropical tropopause layer (stratosphere-troposphere exchange). (2) On the quasi-horizontal scale across the southern subtropical barrier separating the tropical stratospheric reservoir from mid- and high latitudes.
authors.affiliation: Pierre-Simon Laplace, Université Versailles Saint Quentin, 5 Boulevard d'Alembert, 78280 Guyancourt, France. baray@univ-reunion.fr
authors.forename: J L
authors.initials: JL
authors.lastname: Baray
authors.forename: J
authors.initials: J
authors.lastname: Leveau
authors.forename: S
authors.initials: S
authors.lastname: Baldy
authors.forename: J
authors.initials: J
authors.lastname: Jouzel
authors.forename: P
authors.initials: P
authors.lastname: Keckhut
authors.forename: G
authors.initials: G
authors.lastname: Bergametti
authors.forename: G
authors.initials: G
authors.lastname: Ancellet
authors.forename: H
authors.initials: H
authors.lastname: Bencherif
authors.forename: B
authors.initials: B
authors.lastname: Cadet
authors.forename: M
authors.initials: M
authors.lastname: Carleer
authors.forename: C
authors.initials: C
authors.lastname: David
authors.forename: M
authors.initials: M
authors.lastname: De Mazière
authors.forename: D
authors.initials: D
authors.lastname: Faduilhe
authors.forename: S Godin
authors.initials: SG
authors.lastname: Beekmann
authors.forename: P
authors.initials: P
authors.lastname: Goloub
authors.forename: F
authors.initials: F
authors.lastname: Goutail
authors.forename: J M
authors.initials: JM
authors.lastname: Metzger
authors.forename: B
authors.initials: B
authors.lastname: Morel
authors.forename: J P
authors.initials: JP
authors.lastname: Pommereau
authors.forename: J
authors.initials: J
authors.lastname: Porteneuve
authors.forename: T
authors.initials: T
authors.lastname: Portafaix
authors.forename: F
authors.initials: F
authors.lastname: Posny
authors.forename: L
authors.initials: L
authors.lastname: Robert
authors.forename: M
authors.initials: M
authors.lastname: Van Roozendael
mesh_terms: D000336:Aerosols; D004784:Environmental Monitoring / Q000295:instrumentation*; D017752:Greenhouse Effect; D010083:Oxidants, Photochemical / Q000032:analysis*; D010126:Ozone / Q000032:analysis*; D010783:Photometry; D013696:Temperature; D014329:Tropical Climate
chemical_list: D000336:Aerosols; D010083:Oxidants, Photochemical; D010126:Ozone