摘要：基于内蒙古多伦县三个不同区域大气负氧离子自动观测站资料及同步气象

摘要：基于内蒙古多伦县三个不同区域大气负氧离子自动观测站资料及同步气象观测、空气污染物指标资料，运用数理统计方法，从逐时及日、月、季尺度分别分析各区域环境下负氧离子浓度的变化特征，并对其影响因素进行分析。结果表明：①负氧离子浓度日变化规律为早晨最高，14时至15时最低；夜间浓度高于白天；日变化幅度为森林最大、草地次之、城区公园最小。浓度日变化与气温、二分钟平均风速呈极显着负相关，与气压、相对湿度呈极显着正相关。②负氧离子浓度6月至10月间月变化基本呈正态分布,7月至8月最高；月变化幅度同是森林最大、草地次之、城区公园最小。浓度月变化与气压、日照时数不存在线性相关，与气温、相对湿度、降水量呈正相关，与二分钟平均风速呈负相关。③负氧离子浓度四季变化规律为夏季>秋季>冬季>春季。④季节不同，影响负氧离子日平均浓度大小的因子也有所不同。⑤以负氧离子浓度等级评价空气质量，森林及城区公园空较清新占比达99%，草原为72%。<br>关键词：北方草原；负氧离子浓度；变化规律；影响因子；

摘要：基于内蒙古多伦县三个不同区域大气负氧离子自动观测站资料及同步气象观测、空气污染物指标资料，运用数理统计方法，从逐时及日、月、季尺度分别分析各区域环境下负氧离子浓度的变化特征，并对其影响因素进行分析。 结果表明：①负氧离子浓度日变化规律为早晨最高，14 时至 15时最低；夜间浓度高于白天；日变化幅度为森林最大、草地次之、城区公园最小。 浓度日变化与气温、二分钟平均风速呈极显著负相关，与气压、相对湿度呈极显著正相关。 ②负氧离子浓度6 月至10月间月变化基本呈正态分布,7月至8 月最高；月变化幅度同是森林最大、草地次之、城区公园最小。 浓度月变化与气压、日照时数不存在线性相关，与气温、相对湿度、降水量呈正相关，与二分钟平均风速呈负相关。 ③负氧离子浓度四季变化规律为夏季>秋季>冬季>春季。 ④季节不同，影响负氧离子日平均浓度大小的因子也有所不同。 ⑤以负氧离子浓度等级评价空气质量，森林及城区公园空较清新占比达 99%，草原为 72%。<br>关键词：北方草原；负氧离子浓度；变化规律；影响因子；

Abstract: Based on the data of atmospheric negative oxygen ion automatic observation station, synchronous meteorological observation and air pollutant index data in three different regions of Duolun County, Inner Mongolia, using mathematical statistics method, the variation characteristics of negative oxygen ion concentration in each regional environment were analyzed from hourly, daily, monthly and seasonal scales, and its influencing factors were analyzed. The results showed that: (1) the diurnal variation of the concentration of negative oxygen ions was the highest in the morning and the lowest at 14:00-15:00; the concentration at night was higher than that in the daytime; the daily variation range was the largest in forest, followed by grassland, and the smallest in urban park. The diurnal variation of concentration was negatively correlated with air temperature and two minute average wind speed, and positively correlated with air pressure and relative humidity. ② The monthly variation of negative oxygen ion concentration from June to October was basically normal distribution, with the highest from July to August; the monthly variation range was the largest in forest, followed by grassland, and the smallest in urban park. There was no linear correlation between monthly concentration and air pressure and sunshine hours, but positive correlation with air temperature, relative humidity and precipitation, and negative correlation with two minute average wind speed. ③ The seasonal variation of negative oxygen ion concentration was summer > autumn > winter > spring. ④ The factors affecting the daily average concentration of negative oxygen ions vary with seasons. ⑤ According to the negative oxygen ion concentration grade, 99% of the air quality was fresh in the forest and urban parks, and 72% in the grassland.<br>Keywords: northern grassland; concentration of negative oxygen ion; variation law; influencing factor;<br>