摘要
选用天津市2020年逐小时空气负氧离子和气象观测资料,对森林、湿地、城区3种典型功能区不同季节、不同天气的空气负氧离子浓度变化规律及其与气象要素的关系进行分析。结果表明:空气负氧离子浓度为森林>湿地>城区,夏季>春季>秋季>冬季,雨天最高,雪天最低,森林晴天负氧离子浓度略高于雾天,湿地和城区晴天略低于雾天。空气负氧离子浓度日变化呈双峰型,日变化幅度森林>湿地>城区,夏季>春季>秋季>冬季。空气负氧离子浓度总体与气温、相对湿度、水汽压、过去24 h降水量呈正相关,与气压呈负相关,与能见度相关关系不一致,与风速相关关系不显著。不同季节、不同天气条件的空气负氧离子浓度与气象要素的相关关系存在差异。城区空气负氧离子浓度受人类活动干扰较大,变化规律较森林和湿地更加复杂,与气象要素的相关关系总体较差。
Utilizing hourly air negative oxygen ion and meteorological observation data from Tianjin city in 2020,the variations in air negative oxygen ion concentrations(ANOIC)across different seasons and weather conditions within three typical functional areas,i.e.forests,wetlands,and urban zones and their relationships with meteorological elements were investigated.The results indicate that the ANOIC is highest in forests,followed by wetlands,and lowest in urban areas,with the ranking for seasons being summer>spring>autumn>winter.The ANOIC is highest on rainy days and lowest on snowy days.The ANOIC in forests on clear days is slightly higher than on foggy days,whereas those in wetlands and urban areas are slightly lower on clear days compared to foggy days.The diurnal variation of ANOIC is bimodal,with the amplitude of variation following the sequences of forests>wetlands>urban areas,and summer>spring>autumn>winter.Overall,ANOIC shows a positive correlation with temperature,relative humidity,vapor pressure,and the amount of precipitation in the past 24 hours,but a negative correlation with atmospheric pressure.The relationship between ANOIC and visibility differs across the different functional areas,while the correlation with wind speed is not significant.The relationship between ANOIC and meteorological elements varies across different seasons and weather conditions.In urban areas,the ANOIC is significantly influenced by human activities,making its variability more complex compared to forests and wetlands,and its correlation with meteorological elements is weaker on the whole.
作者
麻雪艳
孙玫玲
郭玲
王晓佳
MA Xueyan;SUN Meiling;GUO Ling;WANG Xiaojia(Tianjin Meteorological Bureau,Tianjin 300074,China;CMA-NKU Cooperative Laboratory for Atmospheric Enviroment-Health Research,Tianjin 300074,China)
出处
《气象与环境学报》
2024年第2期59-68,共10页
Journal of Meteorology and Environment
基金
中国气象局—南开大学大气环境与健康研究联合实验室开放基金项目(CMANKU202302)资助。
关键词
负氧离子
气象要素
生态功能区
Air negative oxygen ions
Meteorological elements
Ecological functional areas
