气候变化领域集成服务门户(CCPortal): Atmospheric mercury uptake and accumulation in forests dependent on climatic factors

CCPortal

DOI	10.1039/d3em00454f
	Atmospheric mercury uptake and accumulation in forests dependent on climatic factors
	Yang, Yo Han; Kim, Min-Seob; Park, Jaeseon; Kwon, Sae Yun
发表日期	2024
ISSN	2050-7887
EISSN	2050-7895
起始页码	26
结束页码	3
卷号	26 期号:3
英文摘要	The environmental and climatic factors dictating atmospheric mercury (Hg) uptake by foliage and accumulation within the forest floor are evaluated across six mountain sites, South Korea, using Hg concentration and Hg stable isotope analyses. The isotope ratios of total gaseous Hg (TGM) at six mountains are explained by local anthropogenic Hg emission influence and partly by mountain elevation and wind speed. The extent to which TGM is taken up by foliage is not dependent on the site-specific TGM concentration, but by the local wind speed, which facilitates TGM passage through dense deciduous canopies in the Korean forests. This is depicted by the significant positive relationship between wind speed and foliage Hg concentration (r(2) = 0.92, p < 0.05) and the magnitude of delta Hg-202 shift from TGM to foliage (r(2) = 0.37, p > 0.05), associated with TGM uptake and oxidation by foliar tissues. The litter and topsoil Hg concentrations and isotope ratios reveal relationships with a wide range of factors, revealing lower Hg level and greater isotopic fractionation at sites with low elevation, high wind speed, and high mean warmest temperature. We attribute this phenomenon to active TGM re-emission from the forest floor at sites with high wind speed and high temperature, caused by turnover of labile organic matter and decomposition. In contrast to prior studies, we observe no significant effect of precipitation on forest Hg accumulation but precipitation appears to reduce foliage-level Hg uptake by scavenging atmospheric Hg species available for stomata uptake. The results of this study would enable better prediction of future atmospheric and forest Hg influence under climate change.
语种	英语
WOS研究方向	Chemistry ; Environmental Sciences & Ecology
WOS类目	Chemistry, Analytical ; Environmental Sciences
WOS记录号	WOS:001161514100001
来源期刊	ENVIRONMENTAL SCIENCE-PROCESSES & IMPACTS
文献类型	期刊论文
条目标识符	http://gcip.llas.ac.cn/handle/2XKMVOVA/301289
作者单位	Pohang University of Science & Technology (POSTECH); National Institute of Environmental Research (NIER), Republic of Korea
推荐引用方式 GB/T 7714	Yang, Yo Han,Kim, Min-Seob,Park, Jaeseon,et al. Atmospheric mercury uptake and accumulation in forests dependent on climatic factors[J],2024,26(3).
APA	Yang, Yo Han,Kim, Min-Seob,Park, Jaeseon,&Kwon, Sae Yun.(2024).Atmospheric mercury uptake and accumulation in forests dependent on climatic factors.ENVIRONMENTAL SCIENCE-PROCESSES & IMPACTS,26(3).
MLA	Yang, Yo Han,et al."Atmospheric mercury uptake and accumulation in forests dependent on climatic factors".ENVIRONMENTAL SCIENCE-PROCESSES & IMPACTS 26.3(2024).