RUAN Yuqing,LI Lincen,HUANG Ziyun,et al.Meteorological Causes of Ozone Pollution in Sichuan and Chongqing in Summer[J].Journal of Chengdu University of Information Technology,2021,36(04):425-433.[doi:10.16836/j.cnki.jcuit.2021.04.012]
夏季川渝地区臭氧污染的气象成因研究
- Title:
- Meteorological Causes of Ozone Pollution in Sichuan and Chongqing in Summer
- 文章编号:
- 2096-1618(2021)04-0425-09
- Keywords:
- applied meteorology; pollution meteorology; Sichuan-Chongqing region; ozone pollution; ozone variation characteristics; meteorological factors
- 分类号:
- P402
- 文献标志码:
- A
- 摘要:
- 为研究川渝地区夏季臭氧污染特征及气象成因,利用2015-2018年川渝地区臭氧数据和气象数据并主要采用相关分析方法着重对各气象因子与臭氧浓度关系进行了讨论和研究。结果表明:2015-2018年川渝地区臭氧年平均浓度呈现西高东低的分布规律,且空间分布基本不变; 而夏季臭氧浓度的空间变化显著,浓度高值区从川渝地区西北方逐渐转移到东南方,且盆底较边坡臭氧浓度更高。臭氧浓度与相对湿度、降水量呈负相关,而与温度呈正相关。各气象因子中,相对湿度与臭氧浓度的相关性程度最高; 气温、降水量的相关性程度一般; 而气压仅在50%的城市表现出有相关性且相关性程度一般; 风速常年为静小风。臭氧浓度与混合层高度呈正相关。在气温28 ℃左右,相对湿度约为65%,气压约为1002 hPa,日降水量小于或接近0.98 mm,地面风速小于1.5 m/s的气象条件下,发生臭氧污染的可能性较大。
- Abstract:
- In order to study the characteristics and meteorological causes of ozone pollution in Sichuan-Chongqing urban agglomeration in summer, the relationship between meteorological factors and ozone concentration was discussed and studied by using ozone data and meteorological data from 2015 to 2018 in Sichuan-Chongqing area and mainly using correlation analysis method. The results show that from 2015 to 2018, the annual average concentration of ozone in Sichuan and Chongqing presents a distribution law of high in the west and low in the east, and the spatial distribution is basically unchanged; However, the spatial variation of ozone concentration in summer is significant, and the high concentration area gradually shifts from northwest to southeast in Sichuan and Chongqing, and the ozone concentration in basin bottom is higher than that in slope. Ozone concentration is negatively correlated with relative humidity and precipitation, but positively correlated with temperature. Among all meteorological factors, the correlation between relative humidity and ozone concentration is the highest, while the correlation between temperature and precipitation is average. However, the air pressure is only correlated in 50% of cities and the correlation degree is general; Wind speed is quiet and small all the year round. The ozone concentration positively correlated with the height of the mixed layer. Under the meteorological conditions of air temperature about 28 ℃, relative humidity about 65%, air pressure about 1002 hPa, daily precipitation less than or close to 0.98 mm, and surface wind speed less than1.5 m/s,ozone pollution is likely to occur.
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备注/Memo
收稿日期:2020-08-18
基金项目:国家自然科学基金委青年科学基金资助项目(41505122); 国家重点研发计划资助项目(2018YFC0214003); 国家重点研发计划课题资助项目(2018YFC0214002); 四川省科技支撑资助项目(2015GZ0238); 四川省重大科技专项资助项目(2018SZDZX0023)