气候变化领域集成服务门户(CCPortal): Measurement report: Variations in surface SO2 and NOx mixing ratios from 2004 to 2016 at a background site in the North China Plain

CCPortal

DOI	10.5194/acp-22-7071-2022
	Measurement report: Variations in surface SO2 and NOx mixing ratios from 2004 to 2016 at a background site in the North China Plain
	Liu, Xueli; Ran, Liang; Lin, Weili; Xu, Xiaobin; Ma, Zhiqiang; Dong, Fan; He, Di; Zhou, Liyan; Shi, Qingfeng; Wang, Yao
发表日期	2022
ISSN	1680-7316
EISSN	1680-7324
起始页码	7071
结束页码	7085
卷号	22 期号:10 页码:15
英文摘要	Strict air pollution control strategies have been implemented in recent decades in the North China Plain (NCP), previously one of the most polluted regions in the world, and have resulted in considerable changes in emissions of air pollutants. However, little is so far known about the long-term trends of the regional background level of NOx and SO2, along with the increase and decrease processes of regional emissions. In this study, the seasonal and diurnal variations of NOx and SO2 as well as their long-term trends at a regional background station in the NCP were characterized from 2004 to 2016. On average, SO2 and NOx mixing ratios were 5.7 +/- 8.4 and 14.2 +/- 12.4 ppb, respectively. The seasonal variations in SO2 and NOx mixing ratios showed a similar pattern, with a peak in winter and a valley in summer. However, the diurnal variations in SO2 and NOx mixing ratios greatly differed for all seasons, indicating different sources for SO2 and NOx and meteorological effects on their concentrations. Overall, the annual mean SO2 exhibited a significant decreasing trend of 6.1% yr(-1) (R = 0.84, P < 0.01) from 2004 to 2016, which is very close to 6.3% yr(-1) of the annual SO2 emission in Beijing, and a greater decreasing trend of 7.4% yr(-1) (R = 0.95, P < 0.01) from 2008 to 2016. The annual mean of NOx showed a fluctuating rise of C3.4% yr(-1) (R = 0.38, P < 0.40) from 2005 to 2010, reaching the peak value (16.9 ppb) in 2010, and then exhibited an extremely significant fluctuating downward trend of 4.5% yr(-1) (R = 0.95, P < 0.01) from 2010 to 2016. After 2010, the annual mean NO x mixing ratios correlated significantly (R D 0.94, P < 0.01) with the annual NOx emission in North China. The decreasing rate ( 4.8% yr(-1), R = 0.92, P < 0.01) of the annual mean NOx mixing ratios from 2011 to 2016 at the Shangdianzi (SDZ) regional atmospheric background station is lower than the one (8.8% yr(-1), R = 0.94, P < 0.01) for the annual NOx emission in the NCP and in Beijing (9.0% yr(-1), R = 0.96, P < 0.01). This indicated that surface NOx mixing ratios at SDZ had a weaker influence than SO2 on the emission reduction in Beijing and its surrounding areas in the NCP. The increase in the number of motor vehicles led to an increase in traffic emissions for NOx. This study supported conclusions from previous studies that the measures taken for controlling NO x and SO2 in the NCP in the past decades were generally successful. However, NOx emission control should be strengthened in the future.
学科领域	Environmental Sciences; Meteorology & Atmospheric Sciences
语种	英语
WOS研究方向	Environmental Sciences & Ecology ; Meteorology & Atmospheric Sciences
WOS记录号	WOS:000804134200001
来源期刊	ATMOSPHERIC CHEMISTRY AND PHYSICS
文献类型	期刊论文
条目标识符	http://gcip.llas.ac.cn/handle/2XKMVOVA/273367
作者单位	Chinese Academy of Sciences; Institute of Atmospheric Physics, CAS; Chinese Academy of Meteorological Sciences (CAMS)
推荐引用方式 GB/T 7714	Liu, Xueli,Ran, Liang,Lin, Weili,et al. Measurement report: Variations in surface SO2 and NOx mixing ratios from 2004 to 2016 at a background site in the North China Plain[J],2022,22(10):15.
APA	Liu, Xueli.,Ran, Liang.,Lin, Weili.,Xu, Xiaobin.,Ma, Zhiqiang.,...&Wang, Yao.(2022).Measurement report: Variations in surface SO2 and NOx mixing ratios from 2004 to 2016 at a background site in the North China Plain.ATMOSPHERIC CHEMISTRY AND PHYSICS,22(10),15.
MLA	Liu, Xueli,et al."Measurement report: Variations in surface SO2 and NOx mixing ratios from 2004 to 2016 at a background site in the North China Plain".ATMOSPHERIC CHEMISTRY AND PHYSICS 22.10(2022):15.