小兴安岭腹地空气负氧离子浓度变化特征分析

Analysis on Variation Characteristics of Air Negative Oxygen Ion Concentration in Hinterland of Lesser Khingan Mountains

摘要:

为更好地巩固伊春市“中国天然氧吧”创建成果，促进伊春森林康养旅游产业绿色健康发展，助力小兴安岭地区生态资源价值转化，本文基于2021年伊春市13个站点的空气负氧离子浓度监测数据，制定了数据质量控制方法，分析评价了小兴安岭腹地伊春市的负氧离子浓度年、季、月和日变化特征。研究结果显示：伊春市的年平均负氧离子浓度普遍高于国内大多数地区，呈现出山区高、平原低的空间分布特征，且随着经纬度和森林覆盖率逐渐增加而递增，呈现南部到北部的增长趋势。季节变化特征不显著，总体趋势是夏季最高，冬春季次之，秋季最低，而各县区又表现出明显的局部特征。负氧离子浓度具有日变化规律，呈现出U形双峰特征，夜间明显高于白天。月变化特征不显著，峰值出现在7—8月，最低值则出现在1月和4月。全市有90%的县级行政区域负氧离子浓度达到Ⅰ级水平，三种类型监测站的负氧离子浓度基本达到清新及以上水平。

Abstract:

In order to better consolidate the results of the creation of “China’s Natural Oxygen Bar” in Yichun, promote the green and healthy development of Yichun’s forest recreation and tourism industry, and help transform the value of ecological resources in the Lesser Khingan Mountains region, this paper formulates a data quality control method to analyse and evaluate the characteristics of the daily changes of anion concentration in the hinterland of Yichun based on the monitoring data on the anion concentration in the air at 13 stations in Yichun. The annual, seasonal, monthly and diurnal variation of anion concentration in Yichun, the hinterland of the Lesser Khingan Mountains, are analysed and evaluated. The results show that the annual average negative oxygen ion concentration in Yichun is generally higher than that in most areas in China, showing a spatial distribution of high in the mountains and low in the plains, and increasing with the latitude and longitude and the forest cover, showing a growing trend from the south to the north. Seasonal change characteristics are not significant; the overall trend is the highest in summer, followed by winter and spring, and the lowest in autumn, while the counties and districts show obvious local characteristics. Negative oxygen ion concentration has a daily change pattern, showing U-shaped bimodal characteristics, with nighttime significantly higher than daytime. Monthly changes are not significant, with the peak occurring in July-August and the lowest values in January and April. Negative oxygen ion concentrations in 90 percent of the county-level administrative areas reach the level of Class I, and the negative oxygen ion concentrations at the three types of monitoring stations basically reach the level of freshness and above.