Characteristics and Influencing Factors of Air Negative Oxygen Ion and PM2.5 Concentration in Park——A Case Study of Hutou Mountain Forest Park
In order to study the forest health environment around Sanming,the Houtou Mountain Forest Park in Sanming City,Fujian Province,was selected as the research object.The concentrations of negative oxygen ion and PM2.5 were monitored.The spatial-temporal distribution of negative oxygen ion and PM2.5 concentration and its in-fluencing factors were studied.The results show that the lowest value of negative oxygen ion concentration in Houtou Mountain area was more than 3000/cm3,which meets the requirement of negative oxygen ion in Forest Park;the concentrations of PM2.5 in winter ranged from 30～50 μg/m3,while in other seasons the concentrations were around 20 μg/m3;the concentration of PM2.5 in winter was much higher than that in other seasons;combined with the air temperature and humidity,it can be seen that in the four seasons,due to the low temperature in winter,PM2.5 content was slightly higher than the other three seasons,so the benefits of wellness and the playfulness in winter was lower than the other three seasons;spring,summer and autumn were the three seasons with high nega-tive oxygen ion concentration,suitable temperature and humidity,which were the three seasons with the best rec-reation function benefit.Therefore,the content of negative oxygen ion and PM2.5 in the air of Hutou Mountain is in line with the requirements of forest health,and can meet the ecological needs and spiritual cultivation of tour-ists for relaxation,health preservation and recreation.
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