六合区负氧离子时空特征及其与多种气象因子的模型构建

Spatial-Temporal Characteristics of Negative Oxygen Ions in Liuhe Area and the Models of Their Interaction With Various Meteorological Factors

以南京市六合区3个负氧离子观测点作为监测对象,研究空气负氧离子浓度在不同时间尺度上的变化规律及温度、相对湿度对负氧离子浓度的影响。结果表明:①止马岭负氧离子含量日变化呈“双峰型”特征,最大值出现在后半夜到早晨、下午到夜晚时段,日最高值出现在07:00,日最低值出现在15:00;巴山负氧离子浓度为较规律的“波峰波谷交替变化”特征,白天每隔4 h出现一次峰值;金牛湖负氧离子浓度呈“单峰型”特征,夜间到早晨低,傍晚高,日最高值出现在18:00,日最低值出现在10:00。②六合区负氧离子浓度从12月开始逐月增加,3-4月份达到最大值,后又逐渐减小。③止马岭、巴山负氧离子浓度均为冬、春高,夏、秋低,而金牛湖在春季最高,冬季最低。④3个站点负氧离子浓度的年均值均在1500个/cm^(3) 以上,符合我国森林公园负氧离子浓度康养标准。⑤气温、相对湿度仅对止马岭站春季及全年负氧离子浓度有显著影响,而其他站点和时段影响尚不明晰,有待进一步研究。

This paper takes three observation points of negative oxygen ions in Liuhe District,Nanjing Province as monitoring objects.The changes of negative oxygen ion concentration in different time scales and the effects of temperature and relative humidity on negative oxygen ion concentration were studied.The results are as follows:①The diurnal variation of negative oxygen ion content in Zhimaling shows a"Double Peak"pattern.The maximum value appears from midnight to morning,afternoon to night,and the daily maximum value appears at 07:00.The daily lowest value appeared at 15:00.The negative oxygen ion concentration in Bashan was a regular"alternating peaks and valleys"characteristic,with a peak value appearing every 4 hours during the day.The negative oxygen ion concentration in Jinniuhu is characterized by"Single peak",low from night to morning and high in the evening.The daily maximum value appears at 18:00,and the daily minimum value appears at 10:00.②The concentration of negative oxygen ions in the Liuhe area increased from December to March and April,then decreased gradually.③The concentration of negative oxygen ions in Zhimaling and Bashan is higher in winter and spring,and lower in summer and autumn,while Jinniuhu has the highest concentration in spring and the lowest in winter.④The average annual concentration of negative oxygen ions at three sites are above 1500 per cubic centimeter,which meets the health standards for negative oxygen ion concentration in forest parks in China.⑤Temperature and relative humidity only have a significant impact on the concentration of negative oxygen ions at Zhimaling Station in spring and throughout the year,while the effects of other stations and time periods are not yet clear and require further research.