龙岩国家森林公园冬季负离子浓度变化特征

摘要

A field measurement was made at 15 monitoring points of 5 kinds of recreational sites of Longy-an National Forestry Park,testing the data of the aero-anion concentration,meteorological factors and other rel-evant data for 7 consecutive days in January,2016.The analysis of the data showed that:1) the air anions had an average daily concentration of 7 108. 06 particles/cm3 . The concentration met the requirements set by the World Health Organization and had a health care effect.So this park is a good place for recreation and entertain-ment;2) the rule of the daily variation of anion concentrations in the sample areas in the park was basically.The first peak value appeared at 07:00-09:00 in the morning,and the second peak value appeared at 13:00-15:00 in the afternoon;the concentration in the coniferous forest reaches its maximum at 13:00-15:00 on each day;the rule of the daily variation of anion concentrations in the tea garden began to show a declining trend at 07:00 am;the peak value in the dynamic water appeared at 09:00-11:00 and 15:00-17:00;3) the average daily anion concentration in the parts of the park showed a descending order:the zones near water,tea garden, coniferous forest,open field and broad-leaved forest;4) a research of the correlation between meteorological factors and aero-anion concentration showed that there was a highly significant negative correlation between aero-anion concentration and relative humidity,while there was a significant positive correlation between aero-anion concentration and atmospheric pressure.%于2016年1月份连续7 d,对龙岩国家森林公园5类游憩地15个检测点的空气负离子浓度、气象因子等数据进行实测,进行数据分析,结果表明：(1)园内空气负离子浓度日均值为7108.06个/cm3,达到世界卫生组织所规定的具有保健效果的浓度；(2)园内林地负离子浓度日变化规律基本为双峰式,在07：00—09：00出现第1次峰值,在13：00—15：00出现第2次峰值；次生林在13：00—15：00达到1 d中的最高值；茶园内空气负离子浓度日变化规律整体呈现从07：00—17：00逐渐下降的趋势；动态水的峰值出现在09：00—11：00,15：00—17：002个时段内；(3)园内日均负离子浓度含量从高到低依次为：水体旁、茶园、次生林、空旷地、天然林；(4)气象因子与负离子浓度的相关性研究显示,负离子浓度与相对湿度呈极显著负相关,而同气压呈显著正相关。