LIU Leilei,NIE Chunli,ZHANG Meng,et al.Effects of Land-sea Breeze on Autumn and Winter Pollution in some Coastal Areas of Guangdong Province[J].Journal of Chengdu University of Information Technology,2021,36(03):316-322.[doi:10.16836/j.cnki.jcuit.2021.03.013]
海陆风对广东沿海地区秋冬季污染物的影响研究
- Title:
- Effects of Land-sea Breeze on Autumn and Winter Pollution in some Coastal Areas of Guangdong Province
- 文章编号:
- 2096-1618(2021)03-0316-07
- 分类号:
- X51
- 文献标志码:
- A
- 摘要:
- 为探究海陆风对沿海城市不同季节污染物的影响特征,结合2015-2018年中国空气质量在线监测分析平台广东省17个站点的污染物观测数据及同期气象资料,利用统计分析方法揭示了沿海典型代表城市秋季O3和冬季PM2.5污染物分布特征,重点针对海陆风对沿海典型代表城市秋季O3和冬季PM2.5污染的影响进行分析研究。结果表明:广东省的东莞市、阳江市、广州市、深圳市4个沿海城市的海风风向范围主要是SE-SSW,为偏南风,陆风风向范围主要是NW-NNE,为偏北风,它对沿海城市的O3和 PM2.5有明显的稀释扩散作用。深圳市受天气系统下沉气流的影响,污染物不易扩散、加之受到来自北部东莞市污染物的影响,故虽在有海陆风参与的环流情况下仍会出现高浓度污染的情况,其中2018年12月至次年2月冬季PM2.5浓度达到最高值,为100 μg/m3,9月至11月O3浓度达到最高值,为245.7 μg/m3。在东莞市、阳江市、广州市、深圳市4个沿海城市的RF指数比同时期在韶关市、河源市这两个内陆城市的RF指数更趋近于1,故由于海陆风造成的局地环流对秋季的O3和冬季的PM2.5起到显著的迁移作用。
- Abstract:
- In order to investigate the influential characteristics of sea-land breeze on the pollutants in different sea-sons in coastal regions, based on the pollutants observation data obtained from 17 stations of China Air Quality Monitoring and analysis platforms in Guangdong Province during 2015-2018 and the meteorological data during the same period. By using statistical analysis method to expatiate the distribution characteristics of O3 in Autumn and PM2.5 in winter in typical coastal cities. And particularly analyze and research the effects of land-sea breeze on O3 in autumn and PM2.5 in winter in typical coastal cities. The results show that the land-sea breeze is mainly SE-SSW, southerly wind in Dongguan, Guangdong, Yangjiang, Guangzhou, Shenzhen, these coastal cities, and the land breeze is mainly NW-NNE, northerly wind. It makes a great dilution and diffusion effect on O3 and PM2.5 in coastal cities. Owing to the influence of the downdraft of the weather system, the pollutants in Shenzhen are difficult to diffuse and are also affected by the pollutants from northern Dongguan. Therefore, high concentrations of pollution still occur under the influence of the land-sea breeze, the PM2.5 concentration in winter reached the highest value from December 2018 to February next year, which was 100 μg/m3, and the O3 concentration reached the highest value from September to November, which was 245.7 μg/m3.The Recirculation Factor in the four coastal cities which are Dongguan, Yangjiang, Guangzhou Shenzhen was closer to 1 than that in the inland cities Shaoguan and Heyuan during the same period. Therefore, the local circulation caused by the land-sea breeze plays a significant role in the migration of O3 in autumn and PM2.5 in winter.
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备注/Memo
收稿日期:2020-05-13
基金项目:国家重点研发计划资助项目(2016YFA0602004); 国家自然科学基金资助项目(91644226); 国家自然科学基金面上资助项目(41775147); 四川省重大科技专项资助项目(2018SZDZXX23); 四川省科技计划资助项目(20YYJC1356)