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DOI	10.1016/j.atmosenv.2020.117869
	Soil-atmosphere exchange of gaseous elemental mercury in three subtropical forests with different substrate Hg concentrations
	Lei D.; Xiaohui S.; Yao L.; Baoyu D.; Qiong W.; Kaiyun L.; Jiawei Z.; Qingru W.; Shuxiao W.
发表日期	2021
ISSN	13522310
卷号	244
英文摘要	The subtropical forest soil in southern China has accumulated a large amount of historically deposited mercury (Hg), which may result in Hg re-emission to the atmosphere and contribute to the global Hg cycle. In this study, the soil-atmosphere exchange of gaseous elemental mercury (Hg0) was monitored using a dynamic flux chamber (DFC) method at three forest sites, with different levels of soil Hg content and atmospheric Hg0 concentration. Specifically, the background testing site, located in Qianyanzhou, showed a net annual soil Hg0 emission (2.12 ng m−2 h−1 during the day and 2.23 ng m−2 h−1 at night), with significant diurnal and seasonal variations. In contrast, the moderately polluted site, which was in Tieshanping (suburb of Chongqing city), showed a much lower annual soil Hg0 emission (0.74 ng m−2 h−1 during the day) and even negative values in spring and winter. The last site, located in Zhuzhou (near a zinc smelter) with heavy Hg contamination, showed an extremely high soil emission all through the year (37.1 ng m−2 h−1 during the day), but relatively lower value in summer (1.37 ng m−2 h−1 during the day). Overall, these results clearly indicated the stimulate effect of high soil Hg content and the suppression effect of high atmospheric Hg0 concentration on soil Hg0 emission. By considering the results, we would suggest that the future Hg emission abatement from anthropogenic sources should enhance the re-emission of historically deposited Hg from subtropical forests, thus delay the decrease in atmospheric Hg0 concentration. © 2020 Elsevier Ltd
英文关键词	China; Compensation point; Natural emission; Soil Hg contamination; Temporal and spatial variation
语种	英语
scopus关键词	Forestry; Soil testing; Soils; Tropics; Anthropogenic sources; Different substrates; Dynamic flux chamber; Emission abatement; Gaseous elemental mercury; Seasonal variation; Subtropical forests; Suppression effects; Soil pollution; mercury; air-soil interaction; concentration (composition); gas exchange; mercury (element); soil emission; subtropical region; air temperature; ambient air; Article; atmosphere; autumn; carbon footprint; China; circadian rhythm; concentration (parameter); forest soil; priority journal; seasonal variation; soil pollution; soil temperature; solar radiation; spring; summer; tropical rain forest; winter; China; Chongqing; Fujian; Jiangxi; Qianyanzhou; Zhuzhou
来源期刊	Atmospheric Environment
文献类型	期刊论文
条目标识符	http://gcip.llas.ac.cn/handle/2XKMVOVA/144891
作者单位	State Key Laboratory of Environmental Simulation and Pollution Control, School of Environment, Tsinghua University, Beijing, 100084, China; State Environmental Protection Key Laboratory of Sources and Control of Air Pollution Complex, Beijing, 100084, China
推荐引用方式 GB/T 7714	Lei D.,Xiaohui S.,Yao L.,et al. Soil-atmosphere exchange of gaseous elemental mercury in three subtropical forests with different substrate Hg concentrations[J],2021,244.
APA	Lei D..,Xiaohui S..,Yao L..,Baoyu D..,Qiong W..,...&Shuxiao W..(2021).Soil-atmosphere exchange of gaseous elemental mercury in three subtropical forests with different substrate Hg concentrations.Atmospheric Environment,244.
MLA	Lei D.,et al."Soil-atmosphere exchange of gaseous elemental mercury in three subtropical forests with different substrate Hg concentrations".Atmospheric Environment 244(2021).