Prabhakar Gouri, Sorooshian Armin, Toffol Emily, Arellano Avelino F, Betterton Eric A
Department of Atmospheric Sciences, University of Arizona, PO BOX 210081, Tucson, Arizona, 85721, USA.
Department of Chemical and Environmental Engineering, University of Arizona, PO BOX 210011, Tucson, Arizona, 85721, USA ; Department of Atmospheric Sciences, University of Arizona, PO BOX 210081, Tucson, Arizona, 85721, USA.
Atmos Environ (1994). 2014 Aug 1;92:339-347. doi: 10.1016/j.atmosenv.2014.04.044.
A statistical analysis of data from the Interagency Monitoring of Protected Visual Environments (IMPROVE) network of aerosol samplers has been used to study the spatial and temporal concentration trends in airborne particulate metals and metalloids for southern Arizona. The study region is a rapidly growing area in southwestern North America characterized by high fine soil concentrations (among the highest in the United States), anthropogenic emissions from an area within the fastest growing region in the United States, and a high density of active and abandoned mining sites. Crustal tracers in the region are most abundant in the summer (April - June) followed by fall (October - November) as a result of dry meteorological conditions which favor dust emissions from natural and anthropogenic activity. A distinct day-of-week cycle is evident for crustal tracer mass concentrations, with the greatest amplitude evident in urban areas. There have been significant reductions since 1988 in the concentrations of toxic species that are typically associated with smelting and mining. Periods with high fine soil concentrations coincide with higher concentrations of metals and metalloids in the atmosphere, with the enhancement being higher at urban sites.
通过对机构间保护视觉环境监测（IMPROVE）气溶胶采样器网络的数据进行统计分析，研究了亚利桑那州南部空气中颗粒金属和类金属的时空浓度趋势。研究区域位于北美西南部，是一个快速发展的地区，其特点是细土浓度高（在美国处于最高水平之列），来自美国增长最快地区内某区域的人为排放，以及活跃和废弃矿场的高密度分布。由于有利于自然和人为活动产生扬尘的干燥气象条件，该地区地壳示踪剂在夏季（4月至6月）最为丰富，其次是秋季（10月至11月）。地壳示踪剂质量浓度存在明显的一周内日循环，在城市地区振幅最大。自1988年以来，通常与冶炼和采矿相关的有毒物种浓度大幅下降。细土浓度高的时期与大气中金属和类金属浓度较高相吻合，在城市地区这种增强更为明显。
