Air-sea exchange of gaseous mercury in the East China Sea

CORC > 生态环境研究中心 > 中国科学院生态环境研究中心 > 大气环境科学实验室

	Air-sea exchange of gaseous mercury in the East China Sea
	Wang, Chunjie; Ci, Zhijia; Wang, Zhangwei; Zhang, Xiaoshan
刊名	ENVIRONMENTAL POLLUTION
	2016-05
卷号	212 页码:535-543
关键词	Gaseous elemental mercury Dissolved gaseous mercury Air-sea exchange East China Sea
英文摘要	Two oceanographic cruises were carried out in the East China Sea (ECS) during the summer and fall of 2013. The main objectives of this study are to identify the spatial-temporal distributions of gaseous elemental mercury (GEM) in air and dissolved gaseous mercury (DGM) in surface seawater, and then to estimate the Hg-0 flux. The GEM concentration was lower in summer (1.61 +/- 0.32 ng m(-3)) than in fall (2.20 +/- 0.58 ng m(-3)). The back-trajectory analysis revealed that the air masses with high GEM levels during fall largely originated from the land, while the air masses with low GEM levels during summer primarily originated from ocean. The spatial distribution patterns of total Hg (THg), fluorescence, and turbidity were consistent with the pattern of DGM with high levels in the nearshore area and low levels in the open sea. Additionally, the levels of percentage of DGM to THg (%DGM) were higher in the open sea than in the nearshore area, which was consistent with the previous studies. The THg concentration in fall was higher (1.47 +/- 0.51 ng l(-1)) than those of other open oceans. The DGM concentration (60.1 +/- 17.6 pg l(-1)) and Hg-0 flux (4.6 +/- 3.6 ng m(-2) h(-1)) in summer were higher than those in fall (DGM: 49.6 +/- 12.5 pg l(-1) and Hg-0 flux: 3.6 +/- 2.8 ng m(-2) h(-1)). The emission flux of Hg-0 from the ECS was estimated to be 27.6 tons yr(-1), accounting for similar to 0.98% of the global Hg-0 oceanic evasion though the ECS only accounts for similar to 0.21% of global ocean area, indicating that the ECS plays an important role in the oceanic Hg cycle. (C) 2016 Elsevier Ltd. All rights reserved.
内容类型	期刊论文
源URL	[http://ir.rcees.ac.cn/handle/311016/35700]
专题	生态环境研究中心_大气环境科学实验室
推荐引用方式 GB/T 7714	Wang, Chunjie,Ci, Zhijia,Wang, Zhangwei,et al. Air-sea exchange of gaseous mercury in the East China Sea[J]. ENVIRONMENTAL POLLUTION,2016,212:535-543.
APA	Wang, Chunjie,Ci, Zhijia,Wang, Zhangwei,&Zhang, Xiaoshan.(2016).Air-sea exchange of gaseous mercury in the East China Sea.ENVIRONMENTAL POLLUTION,212,535-543.
MLA	Wang, Chunjie,et al."Air-sea exchange of gaseous mercury in the East China Sea".ENVIRONMENTAL POLLUTION 212(2016):535-543.