Americas Program: Receptor Modeling of Atmospheric Deposition at the Great Lakes Integrated Atmospheric Deposition (IADN) Stations

9600384 Landsberger美国项目奖金将资助伊利诺伊大学厄巴纳-香槟分校的Sheldon Landsberger博士前往加拿大进行一项关于五大湖大气中有毒物质沉积的研究。他的合作者将是加拿大大气环境服务局（AES）的雷蒙德·梅尔·霍夫博士。主要目标是开发由美国-加拿大综合大气沉积网络（IADN）收集的空气样本的多元素数据集。国际水文监测网络在每一个五大湖都设有监测站，以估计该地区从大气到五大湖的有毒物质，包括微量金属的总输入量。提出了一个化学分析和受体建模方案，其中将使用在IADN站点获得的样品来估计五大湖中微量元素沉积的来源和来源/区域，以及特定城市地区对空气中颗粒物组成的影响。近几十年来，五大湖地区大气中许多有毒微量元素的浓度急剧上升，已达到对公众健康和环境构成潜在威胁的程度。大城市地区下风的有毒物质的大气沉降是对湖泊的潜在重要输入，但国际水文研究所尚未解决这一问题。提出的研究将直接解决这一问题，通过源-受体模拟程序的颗粒大小分布。＊＊＊

9600384 Landsberger This Americas Program award will fund travel expenses to Canada for Dr. Sheldon Landsberger, University of Illinois, Urbana-Champaign, to conduct a study on the atmospheric deposition of toxic materials in the Great Lakes. His collaborator will be Dr. Raymond Meyer Hoff, of the Atmospheric Environment Service (AES) of Canada. The main objective is to develop a multi-element data set on air samples collected by the U.S.-Canada Integrated Atmospheric Deposition Network (IADN). The IADN has stations on site on each of the Great Lakes to provide an estimate of overall regional inputs of toxic materials, including trace metals, from the atmosphere to the Lakes. A program of chemical analysis and receptor modeling is proposed in which samples obtained at the IADN sites will be used to estimate the sources and source/regions of trace elements deposition in the Great Lakes, and the effects of specific urban areas on the airborne particulate matter compositions. The atmospheric concentrations of many toxic trace elements in the Great Lakes area has risen dramatically in recent decades to the point where they pose a potential threat to public health and the environment. Atmospheric deposition of toxic materials downwind from large urban areas is a potentially important input to the Lakes which has not been addressed by the IADN. The proposed research will directly address this problem through a source-receptor modeling program for particle-size distribution. ***