Ozone and aerosol distribution above Mexico City measured with a DIAL/elastic lidar system during the Mexico City Metropolitan Area (MCMA) 2003 field campaign

Valentin Simeonov; Pablo Ristori; Marian Taslakov; Todor Dinoev; Luisa T. Molina; Mario J. Molina; Hubert van den Bergh

doi:10.1117/12.629429

31 October 2005 Ozone and aerosol distribution above Mexico City measured with a DIAL/elastic lidar system during the Mexico City Metropolitan Area (MCMA) 2003 field campaign

Valentin Simeonov, Pablo Ristori, Marian Taslakov, Todor Dinoev, Luisa T. Molina, Mario J. Molina, Hubert van den Bergh

Author Affiliations +

Proceedings Volume 5984, Lidar Technologies, Techniques, and Measurements for Atmospheric Remote Sensing; 59840O (2005) https://doi.org/10.1117/12.629429
Event: SPIE Remote Sensing, 2005, Bruges, Belgium

Abstract

Ozone and aerosol vertical distribution and their time evolution were measured with a combined UV DIAL / 532-nm elastic lidar during the MCMA 2003 field campaign held in April-May 2003 in Mexico City Metropolitan Area (MCMA). The DIAL transmitter is based on a N₂ Raman converter, pumped by the IV^th harmonic of a Nd:YAG laser. The residual second harmonic radiation from the laser is used for aerosol measurements. In the DIAL part of the receiver a dual-telescope configuration ("Long" and "Short" range) is employed to reduce the dynamic range of the signals and a single 20 cm F/4 Newtonian type telescope is used for the aerosol observations at 532 nm. The DIAL wavelengths are transmitted coaxially to the long range telescope and the 532 nm beam is transmitted coaxially to the "aerosol" telescope. The DIAL receiver is equipped with a grating polychromator for spectral separation and the 532 nm receiver uses a narrowband (0.4 nm) interference filter. "Hamamatsu" 5783-06 photosensor modules detect all signals. Ozone concentration was measured to altitudes of up to 6 km AGL and aerosol to 14 km AGL. The height of the PBL was estimated from the aerosol measurements. The diurnal evolution of the PBL and ozone were studied during the campaign. Formation of a residual layer containing elevated ozone concentrations at nighttime, as well as detachment of the PBL in the late afternoon hours were observed.

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Valentin Simeonov, Pablo Ristori, Marian Taslakov, Todor Dinoev, Luisa T. Molina, Mario J. Molina, and Hubert van den Bergh "Ozone and aerosol distribution above Mexico City measured with a DIAL/elastic lidar system during the Mexico City Metropolitan Area (MCMA) 2003 field campaign", Proc. SPIE 5984, Lidar Technologies, Techniques, and Measurements for Atmospheric Remote Sensing, 59840O (31 October 2005); https://doi.org/10.1117/12.629429

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