Xinbin Feng 1, Wei Zhu 1,2, Xuewu Fu 1, Hui Zhang 1,2 1.Institute of Geochemistry, Chinese Academy of Sciences, Guiyang 550002, PR China 2. Graduate University.

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Presentation transcript:

Xinbin Feng 1, Wei Zhu 1,2, Xuewu Fu 1, Hui Zhang 1,2 1.Institute of Geochemistry, Chinese Academy of Sciences, Guiyang , PR China 2. Graduate University of the Chinese Academy of Sciences, Beijing , PR China Earth Science-2014 San Francisco

Regional distributions of anthropogenic Hg emission over the world in 2005 Pacyna et al., 2010

Locations of the sampling sites Waliguan station is one of the Global Atmosphere Watch (GAW) stations, which located at the northeast edge of Tibetan Plateau with elevation of 3810 m a.s.l. Mt. Waliguan

Locations of the sampling sites Shangri-La Shangri-La station is located in the south of China and Southeastern Tibetan Plateau Lat: ° Long: ° Elevation: 3600 m a.s.l

Locations of the sampling sites Mt. Ailao The site is in the forest of Mt. Ailao, Southwestern China Lat: ° Long: ° Elevation: 2450 m a.s.l South and southwest Asia input?

Locations of the sampling sites Mt. Leigong The site situates at the summit of Mt. Leigong in Guizhou province, Southwestern China, one of most Hg polluted area Lat: ° Long: ° Elevation: 2178 m a.s.l

Locations of the sampling sites Mt. Damei The site is at the summit of Mt. Damei, Ningbo, in the coastal and most industrialized area of eastern China Lat: ° Long: ° Elevation: 550 m a.s.l

Locations of the sampling sites The site is located in a forest on the northern slope of Mt. Changbai, Jilin Province, Northeastern China. Lat: ° Long: ° Elevation: 736 m a.s.l

Observation:  Mt. Waliguan: TGM, GOM, PBM, and precipitation THg;  Shangri-La: TGM, GOM, PBM, and precipitation THg;  Mt. Ailao: TGM, GOM, PBM, and precipitation THg;  Mt. Leigong: TGM and precipitation THg;  Mt. Damei: TGM and precipitation THg;  Mt. Changbai: TGM and precipitation THg

Mean: 2.03 ± 1.01 ng m -3 GEM mean: 1.93±1.01 ng m -3 PBM: 50±78 pg m -3 ; GOM:10±11 pg m -3 Time series of Hg species at Mt. Waliguan (since Sep 2007)

Mean: 2.56 ± 0.64 ng m -3 Time series of TGM at Shangri-La (Nov to Nov 2010)

Mean: 2.13±0.65 ng m -3 Time series of TGM at Mt. Ailao (Since May 2011)

(Fu et al., 2012) Time series of TGM at Mt. Changbai (Since Oct 2008) Mean: 1.65 ± 0.53 ng m -3 Increasing rate : 0.04 ng m -3 yr -1 ; 2.5% per year Lowest level among the six stations

Mean: 2.80 ± 1.51 ng m -3 Time series of TGM at Mt. Leigong (May 2008 to May 2009) Fu et al., 2010

Mean: 3.10 ± 1.48 ng m -3 Time series of TGM at Mt. Damei (Since Apr 2011) Highest TGM background level

Statistical summary of atmospheric Hg species in remote areas of China SiteTGM (ng m -3 )GOM (pg m -3 )PBM (pg m -3 ) Mt. Waliguan1.93± ± 1150 ± 78 Mt. Ailao2.13±0.653 ± 335 ± 30 Shangri-La2.56±0.648 ± 838 ± 31 Mt. Changbai1.65±0.53 Mt. Leigong2.80±1.51 Mt. Damei3.10±1.48

Spatial distribution of atmospheric background Hg in China Atmospheric Hg showed a clear spatial distribution pattern in China, with relatively higher TGM concentrations in South and East China. This corresponds very well with the estimates of anthropogenic Hg emissions in China.

TGM in Guiyang City-Southwestern China Guiyang, an industrial city

2001 Mean: ± 7.04 ng m Mean: 9.10 ± ng m -3 Time series of TGM at Guiyang city (2001 &2009)

Source identification— A case study at Mt. Waliguan, Mt. Changbai, and Guiyang city

Potential source areas of atmospheric Hg at Mt. Waliguan (Fu et al., 2012) Eastern Tibetan Plateau and North India

Potential source areas of atmospheric Hg at Mt. Changbai (Fu et al., 2012) North China: one of the most industrialized and urbanized area

Potential source areas of atmospheric Hg at Guiyang city (Fu et al., 2011) West of Guiyang and southwest of Guizhou: Industrial regions

Precipitation Hg concentrations at remote sites of China 3.5± ± ± ± ± ± ±3.1

Conclusions: 1.Atmospheric Hg was continuously monitored at 6 remote sites in China. The Levels of TGM and PBM were higher than those reported from Northern Hemisphere, and GOM concentrations were comparable to those in Northern Hemisphere. 2.Regional sources played an important role in the spatial distributions of atmospheric Hg in China. High levels of atmospheric Hg were observed from sites close to industrial and urbanized regions of China. 3.THg concentrations in precipitation were comparable and/or slightly lower than those observed from US MDN monitoring network. This does not correspond well to the elevated atmospheric Hg levels in China.

GMOS project 973 project NSFC EPRI

Thanks for you attention!