2019-2020年西安城市PM_(2.5)、气体污染物及气象数据集

A dataset of meteorology,PM_(2.5) concentration and gaseous pollutants in Xi'an City from 2019 to 2020

通过近几年的治理,我国空气污染得到一定的改善,但关中地区由于其特殊的地理位置和气候环境,大气污染治理仍面临着巨大的压力和挑战,以臭氧(O3)等污染气体和细颗粒物(PM_(2.5))为特征的区域性复合型大气污染日益严重。厘清大气污染成因并进行污染治理,需要更细致的观测数据提供科学支撑。本数据集是在陕西关中平原区域生态环境变化与综合治理国家野外科学观测站的高新子观测场利用气体分析仪获取的环境大气中的氮氧化物、二氧化硫、臭氧、一氧化碳等污染气体的浓度。通过气象站对站点周边的温湿度、气压、太阳辐射,风速风向等气象数据进行观测;采集了离线PM_(2.5)滤膜并分析出质量浓度数据。观测场位于西安市城市核心区域,数据的观测时间范围是2019年1月到2020年12月,其中污染气体数据的时间分辨率是5分钟,气象数据的时间分辨率是1分钟,PM_(2.5)数据的时间分辨率是24小时。观测仪器每周进行维护和检测以保证仪器的采集质量,分析仪器每月进行仪器校准和标定保证数据质量。本数据集可以为关中地区大气环境提供基础数据记录,也为进一步的污染评价、控制和治理等提供了数据支撑,为关中区域大气污染过程、成因机制,大气污染防控提供科学建议。

Air pollution in China has improved in recent years,but Central Shaanxi region continues to face great pressure and challenges in pollution control due to its unique geographical location and climatic conditions.The regional and complex air pollution,characterized by ozone(O3)and fine particulate matter(PM_(2.5)),is becoming increasingly serious.More meticulous observation data are needed to clarify the causes of air pollution and provide scientific support for control policies.This dataset comprises the data on the concentrations of nitrogen oxides,sulfur dioxide,ozone and carbon monoxide in the atmosphere obtained by gas analyzer in Gaoxinzi Observation Site of the National Observation and Research Station of Regional Ecological Environment Change and Comprehensive Management in Guanzhong Plain.Weather stations collected data on temperature,humidity,air pressure,solar radiation,wind speed,wind direction and other meteorological parameters around the station.Offline PM_(2.5)filter membranes were measured and the mass concentrations were analyzed.The observation site is located in the urban area of Xi'an,Shaanxi Province.The data covers the period from January 2019 to December 2020 with a resolution of 5 minutes for pollution gas data,one minute for meteorological data,and PM_(2.5)collected every 24 hours.Online instruments are calibrated monthly to ensure data quality,while the offline PM_(2.5)sampler is calibrated and maintained weekly to ensure its data quality.This dataset can provide fundamental data records for the atmospheric environment in Central Shaanxi Province and offer data support for further pollution evaluation,control,and treatment.Moreover,it can give researchers scientific insights into the processes,casual mechanisms,as well as prevention and control of atmospheric pollution in Central Shaanxi Province.