Next Article in Journal
Air-Sea Exchange of Legacy POPs in the North Sea Based on Results of Fate and Transport, and Shelf-Sea Hydrodynamic Ocean Models
Previous Article in Journal
Spatio-Temporal Variability of Winter Monsoon over the Indochina Peninsula
Open AccessArticle

Sources and Dynamic Processes Controlling Background and Peak Concentrations of TGM in Nanjing, China

Department of Chemistry, State University of New York College of Environmental Science and Forestry, Syracuse, NY 13210, USA
Department of Earth & Atmospheric Sciences, University of Houston, Houston, TX 77204, USA
Institute for Climate and Global Change Research, Nanjing University, Nanjing 210093, China
School of Atmospheric Sciences, Nanjing University, Nanjing 210093, China
Department of Civil Engineering, Lamar University, Beaumont, TX 77710, USA
Author to whom correspondence should be addressed.
Atmosphere 2014, 5(1), 124-155;
Received: 28 December 2013 / Revised: 5 February 2014 / Accepted: 10 February 2014 / Published: 17 March 2014
Total gaseous mercury (TGM) data from urban Nanjing, at the western edge of the Yangtze River Delta (YRD) region in China, over nine months, were analyzed for peak and background mercury concentrations. The background concentration of TGM was found to be 2.2 ng∙m−3. In examining episodic influences of free tropospheric air masses on the surface TGM concentrations in Nanjing, we hypothesize heterogeneity in the global distribution of TGM concentrations in the free troposphere. The nine-month averaged diurnal cycles of TGM indicate a strong co-emission with SO2 and an underestimation of greater than 80% TGM emissions in current inventories. Regular peak concentrations of mercury were investigated and the major causes were YRD emissions, transport from rural areas, and monsoonal transport. Transport of rural emissions is hypothesized to be from illegal artisanal small-scale gold mining that are currently missing in the emission inventories. Enhancement of TGM associated with summer monsoon contributed to a maximum TGM concentration in mid-May–early June, an inverse seasonality in comparison to most other observations in China, North America, and Europe. View Full-Text
Keywords: Total Gaseous Mercury; China; ASGM; background concentrations Total Gaseous Mercury; China; ASGM; background concentrations
Show Figures

Figure 1

MDPI and ACS Style

Hall, C.B.; Mao, H.; Ye, Z.; Talbot, R.; Ding, A.; Zhang, Y.; Zhu, J.; Wang, T.; Lin, C.-J.; Fu, C.; Yang, X. Sources and Dynamic Processes Controlling Background and Peak Concentrations of TGM in Nanjing, China. Atmosphere 2014, 5, 124-155.

Show more citation formats Show less citations formats

Article Access Map by Country/Region

Only visits after 24 November 2015 are recorded.
Back to TopTop