典型农牧交错区大气负氧离子浓度特征:以内蒙古多伦县为例  

Concentrations and influences of negatively charged oxygen ions in a typical agro-pastoral ecotone:A case study of Duolun County in Inner Mongolia,China

作　　者：张国兰 杨丽桃 王宇宸[5] ZHANG Guolan;YANG Litao;WANG Yuchen(Duolun Meteorological Service,Duolun 027300,Inner Mongolia,China;Research Institute of Meteorological Science of Inner Mongolia Autonomous Region,Hohhot 010051,Inner Mongolia,China;Key Laboratory of Weather Modification of Inner Mongolia Autonomous Region,Hohhot 010051,Inner Mongolia,China;Inner Mongolia Climate Center,Hohhot 010051,Inner Mongolia,China;Xilinguole Meteorological Service,Xilinhot 026000,Inner Mongolia,China)

机构地区：[1]内蒙古自治区多伦县气象局,内蒙古多伦027300 [2]内蒙古自治区气象科学研究所,内蒙古呼和浩特010051 [3]内蒙古自治区人工影响天气重点实验室,内蒙古呼和浩特010051 [4]内蒙古自治区气候中心,内蒙古呼和浩特010051 [5]内蒙古自治区锡林郭勒盟气象局,内蒙古锡林浩特026000

出　　处：《草业科学》2021年第10期1890-1899,共10页Pratacultural Science

基　　金：内蒙古自治区锡林郭勒盟气象局科技创新项目(xmqxjkyxm201901);内蒙古自然科学基金(2021MS04018)。

摘　　要：为探究典型农牧交错区大气负氧离子浓度特征,利用气压、气温、相对湿度、风速、降水量和日照时数几个气象要素及O_(3)、SO_(2)等空气污染物要素,揭示其中影响负氧离子浓度大小的有利及不利因子,并对比研究区内不同下垫面及环境中大气负氧离子浓度差异,以期为生态保护与经济建设共同发展提供决策思路。以内蒙古多伦县为例,重点采用Kruskal-Wallis检验及Spearman相关性分析予以研究,结果表明:1)大气负氧离子浓度全天06:00最高,14:00−15:00最低;负氧离子浓度夜间明显高于白天;不同下垫面及环境下负氧离子浓度存在统计学差异(P<0.05),且差异随季节变化而不同。2)负氧离子浓度存在明显月际变化,6月−10月间以8月为中心基本呈正态分布,7月−8月负氧离子浓度达全年最高;12月至次年4月起伏较小。3)气温与负氧离子浓度日变化呈负相关关系,与负氧离子浓度月际变化呈正相关关系;负氧离子浓度变化与相对湿度呈正相关关系,与风速呈负相关关系,且不随时间尺度而改变;负氧离子浓度月际变化与降水量呈正相关关系,与气压、日照时数无相关性。4)负氧离子浓度日均值与空气污染物指标因子PM 10、CO、SO_(2)、NO_(2)、O_(3)均呈负相关关系,但四季中各相关因子随季节不同而存在差异;与PM 2.5无相关性。To explore the presence and concentrations of negatively charged oxygen ions in the atmosphere in a typical farming-pastoral ecotone,and reveal the effects of negatively charged oxygen ions on meteorological and air pollution parameters,including air pressure,air temperature,wind speed,precipitation,O_(3),and SO_(2),differences in negatively charged oxygen ion concentrations in different atmospheres and different underlying surfaces were compared to provide a decision-making basis for ecological protection and economic construction.Kruskal-Wallis test and Spearman analysis were used to statistically assess relationships.The results showed that:1)air concentrations of negatively charged oxygen ions were highest at 06:00,and lowest at 14:00-15:00,with significant differences in negatively charged oxygen ion concentrations(P<0.05)under different surface and environmental conditions,and seasonal variations,and 2)negatively charged oxygen ion concentrations display obvious inter-monthly variation,representing a normal distribution,with August as the center of the time span from June to October.Concentrations of negatively charged oxygen ions from July to August were the highest in the year,with little fluctuation from December to April.3)a negative correlation was observed between diurnal variation in air temperature and negatively charged oxygen ion concentrations and a positive correlation was observed between monthly variations in air temperature and negatively charged ion concentrations.Negatively charged oxygen ion concentrations correlated positively with relative humidity,and negatively with wind speed.Concentrations did not change with time scale.Monthly variation in negatively charged oxygen ion concentrations correlated positively with precipitation,but not with air pressure or sunshine hours.4)the daily mean concentration of negative oxygen ions correlates negatively with PM 10,CO,SO_(2),NO_(2),and O_(3),and seasonal differences were observed.No correlation with PM 2.5 was noted.

关 键 词：生态环境保护 空气污染物 气象要素 影响因子 相关性 草原 生态康养 

分 类 号：X16[环境科学与工程—环境科学]