ENTRAINMENT HEAT FLUX COMPUTED WITH LIDAR AND WAVELET TECHNIQUE IN BUENOS AIRES DURING LAST CHAITÉN VOLCANO ERUPTION

EZEQUIEL EDUARDO PAWELKO, JACOBO OMAR SALVADOR, PABLO ROBERTO RISTORI, JUAN VICENTE PALLOTTA, LIDIA ANA OTERO, EDUARDO JAIME QUEL

Nueva York

Conferencia; The 27th International Laser Radar Conference (ILRC 27); 2015

City College of NY

At Lidar Division of CEILAP (CITEDEF-CONICET) a multiwavelength Raman-Rayleigh lidar optimized to measure the atmospheric boundary layer is being operated. This instrument is used for monitoring important aerosol intrusion events in Buenos Aires, such as the arrival of volcanic ashes from the Chaiténvolcano eruption on May 2008. That was the first monitoring of volcanic ash with lidar in Argentina. In this event several volcanic ash plumes with high aerosol optical thickness were detected in the free atmosphere, affecting the visibility, surface radiation and therefore, the ABL evolution. In this work, the impact of ashes in entrainment flux ratio is studied. This parameter is obtained from the atmospheric boundary layer height and entrainment zone thickness using algorithms based on covariance wavelet transform.