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2013—2018年海口市区臭氧浓度变化特征
Variation of O3 Concentration in Haikou City from 2013 to 2018
投稿时间:2019-11-27  修订日期:2020-05-28
DOI:10.19316/j.issn.1002-6002.2020.05.06
中文关键词:  臭氧  前体物  气象因子  海口
英文关键词:ozone  precursor  meteorological factor  Haikou
基金项目:国家重点研发计划课题(2016YFA0602501);国家自然科学基金资助项目(41630532,41275093);海南省自然科学基金资助项目(419MS108)
作者单位
符传博 海南省气象科学研究所, 海南 海口 570203
中国科学院大气物理研究所东亚区域气候-环境重点实验室, 北京 100029
海南省南海气象防灾减灾重点实验室, 海南 海口 570203 
丹利* 中国科学院大气物理研究所东亚区域气候-环境重点实验室, 北京 100029 
佟金鹤 海南省气象科学研究所, 海南 海口 570203
海南省南海气象防灾减灾重点实验室, 海南 海口 570203 
徐文帅 海南省环境监测中心站, 海南 海口 571126 
通讯作者:丹利*  中国科学院大气物理研究所东亚区域气候-环境重点实验室, 北京 100029  
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中文摘要:
      利用海口市区4个站点2013—2018年臭氧(O3)逐时观测资料,分析了O3不同时间尺度变化特征、超标情况及其与前体物NO2和气象因子的关系。结果表明:海口市区O3浓度总体偏低,但2013—2018年各站点均有明显的上升趋势,海大站、海师站、龙华站和秀英站的气候倾向率分别为1.26、3.84、3.02、2.93 μg/(m3·a),其中海师站、龙华站和秀英站分别通过了95%、98%、90%的信度检验。秋、冬季海口市O3浓度最高,其中10月O3浓度月平均最大值出现的概率最大,最小值主要出现在8月。O3浓度日变化表现为单峰型,早晨08:00前后O3浓度最低,午后15:00最高。海大站超标率最高(2.82%),海师站和龙华站次之,秀英站最小。4个站点的超标日O3浓度均逐年上升,表明海口市O3超标现象在恶化。O3浓度与日照时间成正相关关系,与相对湿度成负相关关系。当相对湿度为60%~85%、日最高气温为20~30℃时,海口市发生O3浓度超标的概率较高。
英文摘要:
      Using the O3 hourly observation data in the urban region of Haikou City from 2013 to 2018,the variations of O3 at different time scales,exceeding standard rate,and relationships with precursors and meteorological factors were investigated.The results showed that the O3 concentration in Haikou was generally low.However,variations of O3 concentration at 4 stations showed a clear upward trend during the pasted 6 years.The climate tendency rate was 1.26 (Haida),3.84 (Haishi),3.02 (Longhua) and 2.93 μg/(m3·a) (Xiuying),of which Haishi,Longhua and Xiuying stations passed the 95%,98% and 90% significance test,respectively.The O3 concentration was higher in autumn and winter than in spring and summer.The highest monthly average concentration appeared in October,and the lowest value appeared in August.In addition,the diurnal variation was unimodal,with the lowest concentration appeared around 08:00,and the maximum at 15pm.Analysis of the over-standard situation showed that Haida had the highest over-standard rate (2.82%),followed by Haishi and Longhua,and Xiuying was the lowest.Complementary,the over-standard rates at the four stations increased year by year,which indicated that O3 pollution in Haikou City was getting more serious.O3 concentration was positively correlated with sunshine hours and negatively correlated with relative humidity.When the relative humidity was 60%-85% and the daily maximum temperature was 20-30 ℃,the probability of O3 concentration exceeding the standard was high in Haikou City.
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