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首页> 外文期刊>Atmospheric chemistry and physics >A comparison study of regional atmospheric simulations with an elastic backscattering Lidar and sunphotometry in an urban area
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A comparison study of regional atmospheric simulations with an elastic backscattering Lidar and sunphotometry in an urban area

机译：弹性背向散射激光雷达和日光光度法对市区大气模拟的比较研究

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摘要

We describe a comparison study of Aerosol Optical Thickness (AOT) from numerical simulations using a regional atmospheric model with an elastic backscattering lidar operating at 532 nm and a sunphotometer belonging to the AERONET network at S?o Paulo (23°S 46°W) city, Brazil, a very populated urban area. The atmospheric model includes an aerosol emission, transport and deposition module coupled to a radiative transfer parameterization, which takes the interaction between aerosol particles and short and long wave radiation into account. A period of one week was taken as case study during the dry season (late August) when intense biomass burning activities occur at remote areas in South America, and meteorological conditions disfavor the pollution dispersion in the city of S?o Paulo. The situation presented here showed how smoke from biomass burning in remote areas is transported to the south-east part of Brazil and affects the optical atmospheric conditions in S?o Paulo. The numerical simulations are corroborated by in situ measurements of AOT obtained by lidar and sun photometry.
机译：我们通过使用区域大气模型的数值模拟描述了气溶胶光学厚度（AOT）的比较研究，该模型具有在532 nm处运行的弹性反向散射激光雷达和位于圣保罗（23°S 46°W）的AERONET网络的日光计巴西城市，人口稠密的市区。大气模型包括耦合到辐射传递参数化的气溶胶发射，传输和沉积模块，该模块考虑了气溶胶颗粒与短波和长波辐射之间的相互作用。在干旱季节（8月下旬），当南美偏远地区发生大量的生物质燃烧活动，而气象条件不利于圣保罗市的污染扩散时，以一周的时间为例进行研究。这里呈现的情况表明，偏远地区燃烧的生物质所产生的烟雾如何被输送到巴西的东南部，并影响圣保罗的光学大气条件。通过激光雷达和太阳光度法获得的AOT的原位测量结果证实了数值模拟。

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