摘要
主要针对陕西省西咸新区空港新城夏季臭氧质量浓度偏高的问题,通过对主要气象要素与臭氧质量浓度之间的相关性分析,研究气象要素对该区域臭氧质量浓度变化的影响关系,明确各气象要素对臭氧的影响范围,为该地区夏季臭氧污染控制提供参考。于2018年7月27日00:00-8月26日23:00开展了臭氧与气象条件(气温、相对湿度、风向、风速和紫外辐射)监测工作,共30 d。根据监测结果,西咸新区空港新城在盛夏期间(7-8月)臭氧浓度总体偏高,平均质量浓度为103.8μg·m^-3,最大质量浓度达306μg·m^-3,期间有16 d出现了臭氧小时浓度值超标现象;空港新城臭氧浓度日变化呈单峰趋势,最大值出现在17:00左右,最小值出现在06:00左右。研究发现空港新城臭氧质量浓度与气温和紫外辐射强度呈显著正相关,其相关系数分别为r=0.778 3、r=0.582 8,与相对湿度呈显著负相关(r=-0.784 5)。空港新城臭氧质量浓度与风速之间的关系不显著,其相关系数r为0.151 3,这主要与该区域风速较低且变化幅度不大有关。一些气象要素如高温度、强紫外辐射和低相对湿度等有助于该区域臭氧浓度的升高,当环境温度≥32℃、紫外辐射≥40 W·m-2、相对湿度≤60%时,都有利于对流层空气中臭氧的生成,更容易造成O3浓度超标。
This paper mainly focuses on the high summer ozone mass concentration in airport new city(ANC) of Xixian new area, Shaanxi Province, through the correlation analysis of meteorological elements and ozone mass concentration, and identifies the effects of meteorological factors on ozone. In this study, online instruments were used to continuously observe the hourly concentration of ozone in ANC from 27 July to 26 August 2018(31 days). At the same time, the meteorological factors such as temperature(t), relative humidity(RH), wind direction(WD) and wind speed(WS), air pressure(AP), solar radiation(SR) and ultraviolet radiation(UV) was also observed. According to the results, the ozone concentration was generally higher during the midsummer(July & August) at ANC, the average concentration was 103.8 μg·m^-3 and the maximum concentration reached 306 μg·m^-3. there were 16 days when the ozone concentration exceeded the limit during the study period, and its diurnal variation of concentration showed a single peak trend, with the maximum value appearing about 17:00 and the minimum value around 06:00. Ozone concentration in ANC was significantly positively correlated with air temperature and ultraviolet radiation, with correlation coefficients of 0.778 3 and 0.5828 1 respectively, and negatively correlated with relative humidity(-0.784 5). The correlation between ozone concentration and wind speed in ANC was not significant, and the correlation coefficient was 0.151 3, which was mainly related to the low wind speed and small change range in this area. The studies have also found that some meteorological factors have a significant helping effect on the rise of ozone concentration, such as high temperature, strong ultraviolet radiation and low relative humidity. When the environmental temperature ≥32 ℃, ultraviolet radiation ≥40 W·m-2, and relative humidity ≤60%, it is conducive to the generation of ozone in the troposphere, and O3 concentration exceeds the standard.
作者
梁俊宁
马启翔
汪平
刘杰
LIANG Junning;MA Qixiang;WANG Ping;LIU Jie(Shaanxi Provincial Academy of Environmental Science,Xi’an 710061,China)
出处
《生态环境学报》
CSCD
北大核心
2019年第10期2020-2026,共7页
Ecology and Environmental Sciences
基金
陕西省重点研发计划重点产业链（群）项目（2018ZDCXL-SF-02-05）
国家重点研发计划项目(2017YFC0212206)
关键词
空港新城
臭氧
气象因子
相关性分析
airport new city
ozone
meteorological factors
correlation analysis
