UNIDEF   23986
UNIDAD DE INVESTIGACION Y DESARROLLO ESTRATEGICO PARA LA DEFENSA
Unidad Ejecutora - UE
artículos
Título:
Study of the Atmospheric Boundary Layer evolution with lidar and wavelet technique during an intrusion event of volcanic ashes on May 2008 in Buenos Aires
Autor/es:
EZEQUIEL PAWELKO; JUAN PALLOTTA; PABLO ROBERTO RISTORI; LIDIA ANA OTERO; EDUARDO QUEL; O. SIRNES; C. D'ATTELLIS
Revista:
Revista Boliviana de Física
Editorial:
Unión Iberoamericana de Sociedades de Física
Referencias:
Lugar: La Paz; Año: 2011
ISSN:
1562-3823
Resumen:
Lidar is the most powerful tool to study the geometric evolution of Atmospheric Boundary Layer (ABL). At the Lidar Division at CEILAP (CITEDEF-CONICET) a Multiwavelength Raman-Rayleigh Lidar designed to study aerosols, water vapour and Boundary Layer is operated. The instrument is used to monitor important aerosol intrusion events in Buenos Aires, like the arrival of volcanic ashes from the Chaitén volcano eruption on May 2008. In this event several volcanic ash plumes with high Aerosol Optical Thickness (AOT) into the Free Atmosphere (FA) were detected. Visibility, surface radiation and ABL evolution were affected. This work presents a study of this ABL evolution using Wavelet Transform. The wavelet technique is chosen for its potential to determine edges and transitions in lidar backscatter profiles. In addition, it is shown the Boundary Layer Height (BLH), Entrainment Zone Thickness (EZT) and the Entrainment Flux Ratio (EFR) of the event.