摘要
为研究评价辽宁北镇医巫闾山国家级森林公园春、夏、秋三个季节负氧离子浓度及其空气质量状况,于2012年10月至2013年8月期间用DLY-3型空气离子测定仪对其大朝阳景区13个点位进行了空气正、负离子浓度测量。结果显示:森林公园内平均负氧离子浓度40,000个·cm-3,超过市区和世界卫生组织清新空气标准近40倍。其季节分布特征是,夏季负离子浓度最高,平均为104,050个·cm-3;秋季最低,平均为1960个·cm-3;春季平均为14,000个·cm-3。不同观测点位的空气负氧离子浓度有明显差异,其中位于溪涧、流水边的点位浓度最高,其次是草木茂密的阔叶林间,而以孤立于山顶且植被稀少的点位浓度最低。不同植被环境的负氧离子含量由高到低依次为:阔叶林>混交林>针叶林>草地>山石。用森林空气负离子系数(p)及其对应的评价指数(FCI)为标准对其空气质量进行评价,各季节平均,全部13个点位的空气质量FCI等级均为I级。闾山国家森林公园保持完好的茂密森林植被资源是其空气处于清洁、舒适,有益于人体健康状况的决定因素。
13 monitoring spots in five attractions of Dachaoyang scenic of Yiwulvshan National Forest Park in Liaoning Beizhen were chosen according to different scenic features,and their air ion concentrations were measured by DLY- 3 Air Ion Detector during October 2012 to August 2013,to study the distribution of negative oxygen ions and to evaluate the air cleanness degree. The results showed that the average concentration of negative oxygen air ion was about 40,000 cm- 3in Dachaoyang scenic,nearly 40 times more than World Health Organization standards of the fresh air. The distribution of negative oxygen air ion presented seasonal variation; it was the highest in summer,with an average of 104,050 cm- 3,the lowest autumn with average of 1,960 cm- 3,and in spring with average of 14,000 cm- 3. Air negative oxygen ion concentration was significantly different in different spots; the highest concentration was located in streams and the water edge,followed by dense vegetation between broadleaf forest,and the lowest concentration was at the top of the isolated hill with sparse vegetation. The order of negative oxygen ions concentration in different vegetation environments was： waterside 〉broad- leaved forest〉 mixed forest〉 coniferous forest grassland 〉rocks. With forest negative air ions coefficient（ p） and its corresponding evaluation index（ FCI） as the standard for evaluation of their air quality,FCI grade of season average were Class I in all 13 points.
出处
《干旱区资源与环境》
CSSCI
CSCD
北大核心
2015年第3期181-187,共7页
Journal of Arid Land Resources and Environment
基金
中国气象局沈阳大气环境研究所基本科研业务费项目(No.2012IAE-CMA02
2011IAE-CMA09
2011IAE-CMA08)资助
作者简介
周德平（1962-），女，研究员，主要从事气溶胶、云降水物理与大气环境研究。E—mail：yanqizhou234@163.com
