Estudio de la atenuación de la radiación solar por aerosoles sobre Buenos Aires durante un evento extremo ocurrido en 2003

E. WOLFRAM, L. OTERO, L. MURRUNI, J. SALVADOR, R.D´ELIA, PALADINI, E. J. QUEL, R. D. PIACENTINI

Anales AFA

Asociación de Física Argentina, Editor Dr. Roberto Gratton

Año: 2005 vol. 16 p. 279 - 282

0327-358X

En el presente trabajo estudiamos la atenuación que producen los aerosoles atmosféricos en la radiación solar que llega a la superficie de la Tierra, en el rango ultravioleta (290 nm – 400 nm) durante un evento de contaminación aerosólica extremo ocurrido en la Ciudad de Buenos Aires. Para tal fin utilizamos el radiómetro de banda angosta moderada GUV (Biospherical Inst) perteneciente a la Red de Monitoreo Solar de Argentina, en particular el instrumento ubicados en los suburbios del Gran Buenos Aires (CEILAP, Villa Martelli). Por medio del modelo Tropospheric Ultraviolet-Visible (TUV) desarrollado por Madronich (www.acd.ucar.edu/TUV), que resuelve la ecuación de transferencia radiativa, calculamos los aerosoles efectivosefectivos para Buenos Aires en el día considerado. Estos resultados se comparan con los datos derivados del fotómetro solar CIMEL perteneciente a la red AERONET/NASA ubicado en el CEILAP. Además, aportamos mediciones gravimétricas de aerosoles atmosféricos de la fracción fina PM2.5 y gruesa PM2.5-10 colectadas simultáneamente durante el evento de contaminación extremo estudiado, a partir de muestras tomadas en la parte exterior del Laboratorio TANDAR/CNEA, ubicado a corta distancia del CEILAP. In the present work we study the attenuation produced by atmospheric aerosols on solar radiation arriving at ground surface, in the ultraviolet range (290-400 nm) during extreme contamination events occurred over Buenos Aires city. For this study we used the moderated narrow band radiometer GUV (Biospherical Inst) that belongs to the Argentina Solar Monitoring Network. In particular we employed the instrument deployed in Buenos Aires suburb (CEILAP, Villa Martelli). By the use of the Tropospheric Ultraviolet-Visible (TUV) model developed by Madronich (www.acd.ucar.edu/TUV), that resolve the radiative transfer equation, we calculated the effective aerosols for Buenos Aires at the study date. These results are compared with those derived from data taken by the CIMEL solar photometer (AERONET/NASA) deployed at CEILAP. Also we made gravimetric measurements of atmospheric aerosols of fine particles PM2.5 and course particles PM2.5-10 simultaneously, collected during the extreme contamination events under study from samples taken outside the TANDAR/CNEA Laboratory, placed very near CEILAP.2.5 y gruesa PM2.5-10 colectadas simultáneamente durante el evento de contaminación extremo estudiado, a partir de muestras tomadas en la parte exterior del Laboratorio TANDAR/CNEA, ubicado a corta distancia del CEILAP. In the present work we study the attenuation produced by atmospheric aerosols on solar radiation arriving at ground surface, in the ultraviolet range (290-400 nm) during extreme contamination events occurred over Buenos Aires city. For this study we used the moderated narrow band radiometer GUV (Biospherical Inst) that belongs to the Argentina Solar Monitoring Network. In particular we employed the instrument deployed in Buenos Aires suburb (CEILAP, Villa Martelli). By the use of the Tropospheric Ultraviolet-Visible (TUV) model developed by Madronich (www.acd.ucar.edu/TUV), that resolve the radiative transfer equation, we calculated the effective aerosols for Buenos Aires at the study date. These results are compared with those derived from data taken by the CIMEL solar photometer (AERONET/NASA) deployed at CEILAP. Also we made gravimetric measurements of atmospheric aerosols of fine particles PM2.5 and course particles PM2.5-10 simultaneously, collected during the extreme contamination events under study from samples taken outside the TANDAR/CNEA Laboratory, placed very near CEILAP.2.5 and course particles PM2.5-10 simultaneously, collected during the extreme contamination events under study from samples taken outside the TANDAR/CNEA Laboratory, placed very near CEILAP.