Mercury Emission Flux in the Jiaozhou Bay Measured by Flux Chamber

摘要

In November 2009, April 2010, July 2010, October 2010, at a fixed-station of the Jiaozhou Bay, the gaseous element mercury which emitted from seawater was captured by dynamic flux chamber (DFC), together with double gold amalgam coupled technique to measure the mercury emission flux. Results showed that the mercury emission fluxes at sea/air interface were -0.78～1.72ng/(m~2 · h) in November 2009, -0.24～1.32ng/(m~2 · h) in April 2010, -0.46～2.21ng/(m~2· h) in July 2010, -0.15~2.18ng/(m~2 ·h) in October 2010 respectively. In the Jiaozhou Bay, the mercury emitted from sea to air during the day, and was higher in summer and autumn than that in spring and winter. In winter, the mercury emission flux appeared the character of diurnal variance, with the highest value at noon. But in summer and autumn, the highest value appeared at the end of ebb tide due to tidal action. The main environment factor affecting the mercury emission flux at sea/air interface was light intensity. The influence of the tidal movement on the mercury emission flux was different in different seasons.