UNIDEF   23986
UNIDAD DE INVESTIGACION Y DESARROLLO ESTRATEGICO PARA LA DEFENSA
Unidad Ejecutora - UE
artículos
Título:
DETERMINATION OF THE SEASONAL VARIATION OF THE NITROGEN DIOXIDE AND OZONE VERICAL COLUMN DENSITY AT RÍO GALLEGOS, SANTA CRUZ PROVINCE, ARGENTINA, USING A ZENITH-SKY DOAS SYSTEM
Autor/es:
RAPONI, MARCELO; WOLFRAM, ELIAN; QUEL, EDUARDO; JIMÉNEZ, RODRIGO; TOCHO, JORGE
Revista:
Revista Boliviana de Física
Editorial:
UMSA
Referencias:
Año: 2011 vol. 20 p. 45 - 47
ISSN:
1562-3823
Resumen:
Stratospheric ozone (O3) plays a critical role in the atmosphere by absorbing most of the biologically damaging solar UV radiation before it reaches the Earth’s surface. Nitrogen dioxide (NO2) is a key trace gas in the ozone photochemical. The systematic sensing of NO2 and other minority gases is essential in order to understand the stratospheric O3 destruction and formation processes. We present the study carried out on the seasonal variation of the O3 and NO2 vertical column density (VCD), using a zenith-sky DOAS (Differential Optical Absorption Spectroscopy) systems composed by a spectral analyzer (portable spectrometer HR4000, Ocean Optics), two optical fibers (400 µm of core, 25 cm and 6 m of longitude), an automatic mechanical shutter. NO2 and O3 VCD are derived from solar spectra acquired during twilights (87° - 91° zenithal angles). The data retrieved using the DOAS technique are compared with those coming from the SAOZ spectrometer (Systeme d'Analyse par Observation Zenithale, Laboratoire Atmosphères, Milieux, Observations Spatiales (LATMOS), France). Both instruments are located in Rio Gallegos, Santa Cruz province, Argentine (51° 36’ S; 69° 19’ W, 15 m asl), in the CEILAP-RG remote sensing station. We analyze the correlation between the O3 and NO2 VCD and compare the ground-based measurement with those coming from the OMI instrument (Ozone Monitoring Instrument, AURA satellite).