Kim Bong Mann, Teffera Solomon, Zeldin Melvin D
a South Coast Air Quality Management District, Planning and Policy , Diamond Bar , California , USA.
J Air Waste Manag Assoc. 2000 Dec;50(12):2034-2044. doi: 10.1080/10473289.2000.10464242.
In December 1994, the South Coast Air Quality Management District (SCAQMD) initiated a comprehensive program, the PM Technical Enhancement Program (PTEP), to characterize fine PM in the South Coast Air Basin (SCAB). A 1-year special particulate monitoring project was conducted from January 1995 to February 1996 as part of the PTEP. Under this enhanced monitoring, HNO, NH, and speciated PM and PM concentrations were measured at five stations (Anaheim, downtown Los Angeles, Diamond Bar, Fontana, and Rubidoux) in the SCAB and at one background station at San Nicolas Island. PM and PM mass and 43 individual species were analyzed for a full chemical speciation of the particle data. The PTEP data indicate that the most abundant chemical components of PM and PM in the SCAB are NH+ (8-9% of PM and 14-17% of PM), NO (23-26% of PM and 28-41% of PM), SO= (6-11% of PM and 9-18% of PM), organic carbon (OC) (15-19% of PM and 18-26% of PM), and elemental carbon (EC) (5-8% of PM and 8-13% of PM). On an annual average basis, PM comprises 52-59% of the SCAB PM. Annual average PM and PM concentrations showed strong spatial variations, low at coastal sites and high at inland sites. Annual average PM concentrations varied from 40.8 ug/m at Anaheim to 76.8 ug/m at Rubidoux, while annual average PM concentrations varied from 21.7 ug/m at Anaheim to 39.8 ug/m at Rubidoux. The chemical characterizations of the PM and PM concentrations, as well as their spatial variations, were examined; the important findings are summarized in this paper, and the temporal variations are discussed in the companion paper..
1994年12月，南海岸空气质量管理区（SCAQMD）启动了一项全面计划，即颗粒物技术强化计划（PTEP），以描述南海岸空气盆地（SCAB）中的细颗粒物。作为PTEP的一部分，于1995年1月至1996年2月开展了为期1年的特殊颗粒物监测项目。在这种强化监测下，在SCAB的五个站点（阿纳海姆、洛杉矶市中心、钻石吧、丰塔纳和鲁比杜克斯）以及圣尼古拉斯岛的一个背景站点测量了HNO、NH以及特定的颗粒物和颗粒物浓度。对颗粒物数据进行了全面化学形态分析，分析了颗粒物和颗粒物的质量以及43种单个物种。PTEP数据表明，SCAB中颗粒物和颗粒物最丰富的化学成分是NH+（占颗粒物的8 - 9%和颗粒物的14 - 17%）、NO（占颗粒物的23 - 26%和颗粒物的28 - 41%）、SO=（占颗粒物的6 - 11%和颗粒物的9 - 18%）、有机碳（OC）（占颗粒物的15 - 19%和颗粒物的18 - 26%）以及元素碳（EC）（占颗粒物的5 - 8%和颗粒物的8 - 13%）。按年平均计算，颗粒物占SCAB颗粒物的52 - 59%。年平均颗粒物和颗粒物浓度呈现出强烈的空间变化，沿海站点较低，内陆站点较高。年平均颗粒物浓度从阿纳海姆的40.8微克/立方米到鲁比杜克斯的76.8微克/立方米不等，而年平均颗粒物浓度从阿纳海姆的21.7微克/立方米到鲁比杜克斯的39.8微克/立方米不等。研究了颗粒物和颗粒物浓度的化学特征及其空间变化；本文总结了重要发现，相关论文讨论了时间变化情况。
