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):2045-2059. doi: 10.1080/10473289.2000.10464244.
The South Coast Air Quality Management District (SCAQMD) conducted a 1-year special particulate monitoring study from January 1995 to February 1996. This monitoring data indicates that high PM and PM concentrations were observed in the fall (October, November, and December), with November concentrations being the highest. During the rest of the year, PM and PM masses gradually increased from January to September. Monthly PM mass varied from 20 to 120 |ig/m, and monthly PM mass varied from 13 to 63 |j.g/m. The PM-to-PM ratio varied daily and ranged between 22 and 96%. Two types of high-PM days were observed. The first type was observed under fall stagnation conditions, which lead to high secondary species concentrations. The second type was observed under high wind conditions, which lead to high primary coarse particles of crustal components. The highest 24-hr average PM concentration (226.3 |ig/m) was observed at the Fontana station, while the highest PM concentration (129.3 |ig/m) was observed at the Diamond Bar station.
南海岸空气质量管理区（SCAQMD）在1995年1月至1996年2月期间进行了为期一年的特殊颗粒物监测研究。该监测数据表明，秋季（10月、11月和12月）观测到较高的细颗粒物（PM）和粗颗粒物（PM）浓度，其中11月的浓度最高。在一年中的其他时间里，PM和PM质量从1月到9月逐渐增加。每月PM质量在20至120微克/立方米之间变化，每月PM质量在13至63微克/立方米之间变化。PM与PM的比例每天都有所不同，范围在22%至96%之间。观测到两种高PM日类型。第一种类型是在秋季停滞条件下观测到的，这导致二次物种浓度较高。第二种类型是在大风条件下观测到的，这导致地壳成分的一次粗颗粒含量较高。丰塔纳站观测到的24小时平均PM最高浓度为226.3微克/立方米，而钻石吧站观测到的PM最高浓度为129.3微克/立方米。
