气候变化领域集成服务门户(CCPortal): Measurement report: Atmospheric mercury in a coastal city of Southeast China - inter-annual variations and influencing factors

CCPortal

DOI	10.5194/acp-22-11187-2022
	Measurement report: Atmospheric mercury in a coastal city of Southeast China - inter-annual variations and influencing factors
	Shi, Jiayan; Chen, Yuping; Xu, Lingling; Hong, Youwei; Li, Mengren; Fan, Xiaolong; Yin, Liqian; Chen, Yanting; Yang, Chen; Chen, Gaojie; Liu, Taotao; Ji, Xiaoting; Chen, Jinsheng
发表日期	2022
ISSN	1680-7316
EISSN	1680-7324
起始页码	11187
结束页码	11202
卷号	22 期号:17 页码:16
英文摘要	The long-term monitoring of atmospheric mercury is an important part of the effective evaluation of the Minamata Convention on Mercury. Gaseous elemental mercury (GEM), along with conventional air pollutants and meteorological parameters, was simultaneously observed in Xiamen, Southeast China, in January and July over the period 2012-2020. GEM concentrations in January were highest in 2015 (4.47 ngm(-3)) and decreased by 2020 (3.93 ngm(-3)), while GEM concentrations in July were highest in 2017 (2.65 ngm(-3)) and lowest in 2020 (1.56 ngm(-3)). The temporal variation of GEM was typically characterized by higher concentrations in winter than in summer and in nighttime than in daytime. Bivariate polar plots and the concentration weighted trajectory (CWT) model were used to identify the source regions of GEM on a local and regional scale. The results indicate that the high GEM concentrations in January 2015 were likely due to a combination of high-level Hg emissions and adverse meteorological conditions. Generalized additive models (GAMs), which use a regression analysis method, were established and applied to investigate the influencing factors on the interannual variation of GEM. The factors anthropogenic emissions, meteorological conditions, and transportation explained 37.8% +/- 11.9 %, 31.4% +/- 9.0 %, and 30.8% +/- 9.9% on average of the variation of GEM concentrations, respectively. There was a positive relationship of daily GEM concentrations with T and RH, mostly linking to natural surface emissions and Hg chemical transformations. The interpretation rate of anthropogenic emissions has significantly decreased since 2012, indicating the effectiveness of emission mitigation measures in reducing GEM concentrations in the study region.
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:000849777800001
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/273676
作者单位	Chinese Academy of Sciences; Institute of Urban Environment, CAS; Chinese Academy of Sciences; Institute of Urban Environment, CAS; Chinese Academy of Sciences; University of Chinese Academy of Sciences, CAS; Fujian Agriculture & Forestry University
推荐引用方式 GB/T 7714	Shi, Jiayan,Chen, Yuping,Xu, Lingling,et al. Measurement report: Atmospheric mercury in a coastal city of Southeast China - inter-annual variations and influencing factors[J],2022,22(17):16.
APA	Shi, Jiayan.,Chen, Yuping.,Xu, Lingling.,Hong, Youwei.,Li, Mengren.,...&Chen, Jinsheng.(2022).Measurement report: Atmospheric mercury in a coastal city of Southeast China - inter-annual variations and influencing factors.ATMOSPHERIC CHEMISTRY AND PHYSICS,22(17),16.
MLA	Shi, Jiayan,et al."Measurement report: Atmospheric mercury in a coastal city of Southeast China - inter-annual variations and influencing factors".ATMOSPHERIC CHEMISTRY AND PHYSICS 22.17(2022):16.