气候变化领域集成服务门户(CCPortal): Effects of temperature and relative humidity on the partitioning of atmospheric oxidized mercury at a high-altitude mountain background site in Taiwan

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DOI	10.1016/j.atmosenv.2021.118572
	Effects of temperature and relative humidity on the partitioning of atmospheric oxidized mercury at a high-altitude mountain background site in Taiwan
	Nguyen L.S.P.; Sheu G.-R.; Chang S.-C.; Lin N.-H.
发表日期	2021
ISSN	1352-2310
卷号	261
英文摘要	Gas-particle partitioning of oxidized mercury (Hg) plays an important role in governing the speciation, transport and deposition of atmospheric Hg. Although studies on gas-particle partitioning of oxidized Hg have been conducted at some urban sites, comparable studies at remote mountain sites are still limited. This study analyzes multi-year (2014–2016) data of speciated atmospheric Hg concentrations from Lulin Atmospheric Background Station (LABS, 2862 m above sea level), Taiwan, to explore the factors that influence the gas-particle partitioning of atmospheric oxidized Hg. Mean concentrations (±S.D.) of gaseous elemental mercury (GEM), gaseous oxidized mercury (GOM), and particulate-bound mercury (PBM) were 1.54 ± 0.34 ng m−3, 14.5 ± 26.5 pg m−3, and 5.0 ± 12.0 pg m−3, respectively. In addition, our results indicated that the partitioning of Hg(II) toward particles was favored in the upper free troposphere and/or lower stratosphere. Both temperature (T) and relative humidity (RH) were found to strongly affect the gas-particle partitioning of oxidized Hg. Significant negative correlations between the partitioning coefficient (Kp) and T were obtained for all seasons, but peaked in summer. When RH<30%, Kp decreased with increasing RH. However, Kp and RH were positively correlated when RH>30%. Two empirical Kp-T and Kp-T-RH regression equations: log(1/Kp) = 15.0 – 3887.6(1/T) and log(1/Kp) = 17.92 – 4390.0(1/T) – 0.016RH were developed for free tropospheric air downwind of continental East Asia, which could be implemented in a chemical transport model to improve our understanding of the Hg biogeochemical cycle. © 2021 Elsevier Ltd
关键词	East Asia Free troposphere Gas-particle partitioning Mercury speciation
语种	英语
scopus关键词	Atmospheric chemistry; Atmospheric humidity; Atmospheric movements; Biogeochemistry; Mercury compounds; Oxidation; Sea level; Temperature; Troposphere; Urban growth; East Asia; Effects of temperature; Free troposphere; Gas/particle partitioning; Hg concentrations; Mercuries (Hg); Mercury speciations; Oxidized mercury; Temperature and relative humidity; Urban site; Gases; mercury; air temperature; altitude; biogeochemical cycle; concentration (composition); mercury (element); relative humidity; seasonal variation; stratosphere-troposphere interaction; temperature effect; troposphere; air pollutant; altitude; Article; atmospheric particulate matter; biogeochemical cycle; concentration (parameter); controlled study; environmental impact; gas; global health; meteorology; oxidation; partition coefficient; phase partitioning; reaction diffusion model; relative humidity; seasonal variation; spring; stratosphere; summer; Taiwan; temperature sensitivity; troposphere; winter; Taiwan
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/248324
作者单位	Department of Atmospheric Sciences, National Central University, Jhongli, 320, Taiwan; Faculty of Environment, University of Science, Vietnam National University, Ho Chi Minh City, Viet Nam; Center for Environmental Monitoring and Technology, National Central University, Jhongli, 320, Taiwan; Environmental Protection Administration, Executive Yuan, R.O.C. Taiwa, Taipei, 10042, Taiwan
推荐引用方式 GB/T 7714	Nguyen L.S.P.,Sheu G.-R.,Chang S.-C.,et al. Effects of temperature and relative humidity on the partitioning of atmospheric oxidized mercury at a high-altitude mountain background site in Taiwan[J],2021,261.
APA	Nguyen L.S.P.,Sheu G.-R.,Chang S.-C.,&Lin N.-H..(2021).Effects of temperature and relative humidity on the partitioning of atmospheric oxidized mercury at a high-altitude mountain background site in Taiwan.ATMOSPHERIC ENVIRONMENT,261.
MLA	Nguyen L.S.P.,et al."Effects of temperature and relative humidity on the partitioning of atmospheric oxidized mercury at a high-altitude mountain background site in Taiwan".ATMOSPHERIC ENVIRONMENT 261(2021).