Tropospheric aerosol observations in São Paulo, Brazil using a compact lidar system

Landulfo, E; Papayannis, A; De Freitas, AZ; Vieira, ND; Souza, RF; Goncalves, A; Castanhos, ADA; Artaxo, P; Sanchez-Ccoyllo, OR; Moreira, DS; Jorge, PMP

dc.contributor.author	Landulfo, E	en
dc.contributor.author	Papayannis, A	en
dc.contributor.author	De Freitas, AZ	en
dc.contributor.author	Vieira, ND	en
dc.contributor.author	Souza, RF	en
dc.contributor.author	Goncalves, A	en
dc.contributor.author	Castanhos, ADA	en
dc.contributor.author	Artaxo, P	en
dc.contributor.author	Sanchez-Ccoyllo, OR	en
dc.contributor.author	Moreira, DS	en
dc.contributor.author	Jorge, PMP	en
dc.date.accessioned	2014-03-01T01:23:17Z
dc.date.available	2014-03-01T01:23:17Z
dc.date.issued	2005	en
dc.identifier.issn	0143-1161	en
dc.identifier.uri	https://dspace.lib.ntua.gr/xmlui/handle/123456789/16885
dc.subject.classification	Remote Sensing	en
dc.subject.classification	Imaging Science & Photographic Technology	en
dc.subject.other	Backscattering	en
dc.subject.other	Optical radar	en
dc.subject.other	Photometers	en
dc.subject.other	Thickness measurement	en
dc.subject.other	Troposphere	en
dc.subject.other	Extinction coefficients	en
dc.subject.other	Optical thickness	en
dc.subject.other	Planetary boundary layer (PBL)	en
dc.subject.other	Aerosols	en
dc.subject.other	aerosol	en
dc.subject.other	backscatter	en
dc.subject.other	lidar	en
dc.subject.other	optical depth	en
dc.subject.other	remote sensing	en
dc.subject.other	troposphere	en
dc.subject.other	Brazil	en
dc.subject.other	Sao Paulo [Brazil]	en
dc.subject.other	South America	en
dc.subject.other	Western Hemisphere	en
dc.subject.other	World	en
dc.title	Tropospheric aerosol observations in São Paulo, Brazil using a compact lidar system	en
heal.type	journalArticle	en
heal.identifier.primary	10.1080/01431160500033971	en
heal.identifier.secondary	http://dx.doi.org/10.1080/01431160500033971	en
heal.language	English	en
heal.publicationDate	2005	en
heal.abstract	A backscattering light detection and ranging (lidar) system, the first of this kind in the country, has been set up in a suburban area in the city of São Paulo, Brazil (23°33′ S, 46°44′ W) to provide the vertical profile of the aerosol backscatter and extinction coefficients at 532 nm and up to 4-5 km height above sea level (asl). The measurements have been carried out during the second half of the so-called Brazilian dry season, September and October in the year of 2001. When possible, the lidar measurements were complemented with aerosol optical thickness measurements obtained by a CIMEL Sun-tracking photometer in the visible spectral region, not only to validate the lidar data, but also to provide an input value of the so-called extinction-to-backscatter ratio (lidar ratio). The lidar data were also used to retrieve the Planetary Boundary Layer (PBL) height and low troposphere structural features over the city of São Paulo. Three-dimensional air mass back trajectory analysis was also conducted to determine the source regions of aerosols observed during this study. These first lidar measurements over the city of São Paulo during the second half of the dry season showed a significant variability of the aerosol optical thickness (AOT) in the lower troposphere (0.5-5 km) at 532 nm. It was also found that the aerosol load is maximized in the 1-3 km height region and this load represents about 20-25% of the lower tropospheric aerosol. © 2005 Taylor & Francis Group Ltd.	en
heal.publisher	TAYLOR & FRANCIS LTD	en
heal.journalName	International Journal of Remote Sensing	en
dc.identifier.doi	10.1080/01431160500033971	en
dc.identifier.isi	ISI:000230757900007	en
dc.identifier.volume	26	en
dc.identifier.issue	13	en
dc.identifier.spage	2797	en
dc.identifier.epage	2816	en