Characterization of Atmospheric Organic Aerosol through Integrated Analysis and Modeling of MILAGRO-2006 Multi-platform Measurements

该奖项将支持有机和其他气溶胶及其区域影响的研究，方法是将建模研究与2006年墨西哥城大都市区MILAGRO（巨型城市倡议：地方和全球研究观测）运动期间获得的广泛的多平台地面、飞机和卫星测量相结合。将编制一份更新的基于全面测量的气体和颗粒物排放清单，并将其用作化学运输模型的输入。反过来，将评估化学传输模型再现丰富的MILAGRO PM和痕量气体数据集的能力。化学传输模型研究将使用一个修改后的版本的在线耦合天气研究预测模型与化学（WRF-CHEM）。气象集合技术将用于调查气象对PM模拟的影响。该项目将涉及五个具体目标：i）改进对气体和PM排放以及气象场的估计; ii）描述不同排放源形成的二次有机气溶胶（SOA）的特征; iii）评估生物质燃烧和生物源对PM的影响; iv）量化区域范围内人为与自然PM源的相对贡献;及v）研究城市气溶胶对区域光化学和气象的影响。该项目将为博士后研究人员提供支持。这项研究的结果将对科学界有价值，但也将用于向对区域空气质量感兴趣的墨西哥当局介绍情况。

This award will support studies of organic and other aerosols and their regional impact through the integration of modeling studies with the extensive multi-platform ground-, aircraft- and satellite-based measurements obtained during the 2006 MILAGRO (Megacity Initiative: Local And Global Research Observations) Campaign in the Mexico City Metropolitan Area. An updated comprehensive measurement-based emissions inventory of gases and particulate matter (PM) will be developed and will be used as input to chemical transport models. In turn, the capability of the chemical transport models to reproduce the rich MILAGRO PM and trace gas data sets will be evaluated. Chemical transport modeling studies will be conducted using a modified version of an on-line coupled Weather Research Forecasting Model with Chemistry (WRF-CHEM). A meteorological ensemble technique will be used to investigate the meteorological impacts on PM simulations. The project will address five specific objectives: i) to improve the estimates of gaseous and PM emissions and the meteorological fields; ii) to characterize formation of secondary organic aerosol (SOA) from different emission sources; iii) to assess the impact of biomass burning and biogenic sources on PM; iv) to quantify the relative contribution of anthropogenic vs. natural sources of PM on the regional scale; and v) to investigate the impact of urban aerosols on regional photochemistry and meteorology.The project will provide support for postdoctoral researchers. The results of this study will be of value to the scientific community, but also be used in presentations to Mexican authorities interested in regional air quality.