Elastic Lidar Measurements in Megacity Impacts on Regional and Global Environments-Mexico City Pollution Outflow Field Campaign (MIRAGE-Mex)

该奖项支持部署一个移动弹性激光雷达系统，用于在大城市对区域和全球环境的影响--墨西哥城实验期间，测量离墨西哥城不同距离的气溶胶的辐射特性。幻影的目标是研究墨西哥城流出的气体和气溶胶污染物的化学和物理变化。墨西哥城目前是世界第二大大都市区。该项目涉及部署弹性激光雷达系统和辅助设备。使用移动激光雷达将能够描述墨西哥城羽流进入周围地区时的位置、浓度、范围和持久性。该系统的机动性将使一个地区的气溶胶与其逆风来源之间建立联系。这些测量将有助于解决与气溶胶大小、形状和成分随时间变化有关的问题。激光雷达将提供有关大气中气溶胶的高度、后向散射系数、衰减系数和相对密度的信息，以及边界层高度、夹带参数和云层的数量、高度和光学厚度的信息。最终，这项提案将提供的信息将用于开发减轻排放到大气中的影响的方法。该项目将为几名研究生提供宝贵的研究经验。

This award supports the deployment of a mobile elastic lidar system for measurements of the radiative properties of aerosols at various distances from Mexico City during the Megacity Impacts on Regional and Global Environments - Mexico City experiment (MIRAGE-Mex). The goal of MIRAGE is to study the chemical and physical transformations of gaseous and aerosol pollutants in the outflow from Mexico City, currently the world's second largest metropolitan area. This project involves the fielding of an elastic lidar system and supporting equipment. The use of a mobile lidar will allow the characterization of the location, concentration, extent and persistence of the Mexico City plume as it transports into the surrounding regions. The mobility of the system will allow connections to be made between aerosols in one area and their sources upwind. These measurements will help to address issues relating to changes in aerosol size, shape and composition with time. The lidars will provide information on the height, backscatter and attenuation coefficients and relative density of aerosols in the atmosphere, as well as the height of the boundary layer, the entrainment parameter, and the amount, height and optical depth of cloud layers. Ultimately, the information this proposal will provide will be used to develop methods to mitigate the effects of emissions into the atmosphere. The project will provide valuable research experience to several graduate students.