Monsoon-facilitated characteristics and transport of atmospheric mercury at a high-altitude background site in southwestern China

CORC > 西双版纳热带植物园 > 中国科学院西双版纳热带植物园 > 全球变化研究组

	Monsoon-facilitated characteristics and transport of atmospheric mercury at a high-altitude background site in southwestern China
	Zhang, Yiping
刊名	ATMOSPHERIC CHEMISTRY AND PHYSICS
	2016
卷号	16 期号:20 页码:13131-13148
ISSN号	1680-7316
中文摘要	To better understand the influence of monsoonal climate and transport of atmospheric mercury (Hg) in southwestern China, measurements of total gaseous mercury (TGM, defined as the sum of gaseous elemental mercury, GEM, and gaseous oxidized mercury, GOM), particulate bound mercury (PBM) and GOM were carried out at Ailaoshan Station (ALS, 2450ma.s.l.) in southwestern China from May 2011 to May 2012. The mean concentrations (+/- SD) for TGM, GOM and PBM were 2.09 +/- 0.63, 2.2 +/- 2.3 and 31.3 +/- 28.4 pg m(-3), respectively. TGM showed a monsoonal distribution pattern with relatively higher concentrations (2.22 +/- 0.58 ngm(-3), p = 0.021) during the Indian summer monsoon (ISM, from May to September) and the east Asia summer monsoon (EASM, from May to September) periods than that (1.99 +/- 0.66 ng m(-3)) in the non-ISM period. Similarly, GOM and PBM concentrations were higher during the ISM period than during the non-ISM period. This study suggests that the ISM and the EASM have a strong impact on longrange and transboundary transport of Hg between southwestern China and south and southeast Asia. Several high TGM events were accompanied by the occurrence of northern wind during the ISM period, indicating anthropogenic Hg emissions from inland China could rapidly increase TGM levels at ALS due to strengthening of the EASM. Most of the TGM and PBM events occurred at ALS during the non-ISM period. Meanwhile, high CO concentrations were also observed at ALS, indicating that a strong south tributary of westerlies could have transported Hg from south and southeast Asia to southwestern China during the non-ISM period. The biomass burning in southeast Asia and anthropogenic Hg emissions from south Asia are thought to be the source of atmospheric Hg in remote areas of southwestern China during the nonISM period.
学科主题	Meteorology & Atmospheric Sciences
原文出处	10.5194/acp-16-13131-2016
语种	英语
公开日期	2017-06-06
内容类型	期刊论文
源URL	[http://ir.xtbg.org.cn/handle/353005/10420]
专题	西双版纳热带植物园_全球变化研究组
推荐引用方式 GB/T 7714	Zhang, Yiping. Monsoon-facilitated characteristics and transport of atmospheric mercury at a high-altitude background site in southwestern China[J]. ATMOSPHERIC CHEMISTRY AND PHYSICS,2016,16(20):13131-13148.
APA	Zhang, Yiping.(2016).Monsoon-facilitated characteristics and transport of atmospheric mercury at a high-altitude background site in southwestern China.ATMOSPHERIC CHEMISTRY AND PHYSICS,16(20),13131-13148.
MLA	Zhang, Yiping."Monsoon-facilitated characteristics and transport of atmospheric mercury at a high-altitude background site in southwestern China".ATMOSPHERIC CHEMISTRY AND PHYSICS 16.20(2016):13131-13148.