TSP and atmospheric 210 Pb concentrations were observed at Tsukuba, Japan during July 2001 to March 2005. TSP concentrations ranged from 14.5 to 152.4 µg m −3 . 210 Pb concentrations ranged from 0.04 to 0.86 mBq m −3 which was low in summer and high in winter to spring. Although TSP concentrations changed annually, 210 Pb concentrations had almost the same concentration level and seasonal variation. The correlation coefficient between 210 Pb concentration and NO 3 − concentration was slightly higher than for other ion species. This result indicated that both had been attached to the same particle size and transported to the sampling site.

中文翻译：

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日本筑波大气 210Pb 浓度特征及其与主要离子种类的关系

2001 年 7 月至 2005 年 3 月期间，在日本筑波观测到 TSP 和大气 210 Pb 浓度。TSP 浓度范围为 14.5 至 152.4 µg m -3 。210 Pb 浓度范围为 0.04 至 0.86 mBq m -3 ，夏季低，冬季至春季高。尽管 TSP 浓度每年都在变化，但 210 Pb 的浓度水平和季节变化几乎相同。210 Pb 浓度和NO 3 - 浓度之间的相关系数略高于其他离子种类。这一结果表明，两者都附着在相同的粒径上并被运送到采样点。