M - O
type: Concept

OCOMA
type: Concept
in scheme: projects
definition: In English: The main objectives of Project OCOMA are: -Development and installation of a new instrument, developed by INTA to observe Bro and OClO total columns. -To widen the scarce available information about the time-space distribution of stratospheric NO2, O3, OClO and BrO in Antarctic and Subantarctic regions -To set latitudinal, seasonal and interannual trends in NO2 behaviour as well as to understand its effect on stratospheric O3 Daily twilight observations of NO2 and O3 total columns were made over Belgrano, Marambio and Ushuaia during the term of the project. These measurements were performed with the EVA DOAS-Spectrometers, which have been developed by INTA and were brought to the three sites by means of a co-operation agreement between INTA and DNA (Argentina), within the framework of a wider project for continuous monitoring of the Antarctic and subantarctic stratosphere. 35-40 ozonesondes were launched every year allowing the measurement of ozone vertical profiles over Belgrano. OClO and BrO total columns over Belgrano were obtained through the setting up of the spectrograph NEVA, a new instrument using the DOAS technique. Another instrument, TEI-49C, came also into operation leading to observations of surface ozone levels in Belgrano. En Español: Los objetivos fundamentales del proyecto OCOMA han sido: -Desarrollo e instalacion de un nuevo instrumento desarrollado por el INTA para la observacion de la columna total de BrO y OClO. -Incrementar la escasa informacion existente sobre la distribucion espacio-tiempo del NO2, Ozono, OClO, BrO presentes en la estratosfera en las regiones antartica y subantartica. -Determinar las tendencias latitudinales, estacionales e interanuales de NO2 e interpretar su influencia sobre el O3 estratosferico Durante el periodo de desarrollo del proyecto se realizaron observaciones crepusculares diarias de la columna total de NO2 y ozono sobre Belgrano, Marambio y Ushuaia utilizando los espectrometros DOAS (EVA). Estos instru…