title: Distributions and sea-to-air fluxes of chloroform, trichloroethylene, tetrachloroethylene, chlorodibromomethane and bromoform in the Yellow Sea and the East China Sea during spring.
abstract: Halocarbons including chloroform (CHCl3), trichloroethylene (C2HCl3), tetrachloroethylene (C2Cl4), chlorodibromomethane (CHBr2Cl) and bromoform (CHBr3) were measured in the Yellow Sea (YS) and the East China Sea (ECS) during spring 2011. The influences of chlorophyll a, salinity and nutrients on the distributions of these gases were examined. Elevated levels of these gases in the coastal waters were attributed to anthropogenic inputs and biological release by phytoplankton. The vertical distributions of these gases in the water column were controlled by different source strengths and water masses. Using atmospheric concentrations measured in spring 2012 and seawater concentrations obtained from this study, the sea-to-air fluxes of these gases were estimated. Our results showed that the emissions of C2HCl3, C2Cl4, CHBr2Cl, and CHBr3 from the study area could account for 16.5%, 10.5%, 14.6%, and 3.5% of global oceanic emissions, respectively, indicating that the coastal shelf may contribute significantly to the global oceanic emissions of these gases.
authors: Key Laboratory of Marine Chemistry Theory and Technology, Ministry of Education, College of Chemistry and Chemical Engineering, Ocean University of China, Qingdao 266100, China.
authors: Zhen
authors: Z
authors: He
authors: Gui-Peng
authors: GP
authors: Yang
authors: Xiao-Lan
authors: XL
authors: Lu
authors: Hong-Hai
authors: HH
authors: Zhang
mesh_terms: D000393:Air Pollutants / Q000032:analysis*; D002681:China; D002725:Chloroform; D002734:Chlorophyll / Q000032:analysis; D000077194:Chlorophyll A; D004784:Environmental Monitoring; D004787:Environmental Pollution / Q000706:statistics & numerical data; D054712:Salinity; D012621:Seasons; D012623:Seawater / Q000737:chemistry; D013750:Tetrachloroethylene / Q000032:analysis*; D014241:Trichloroethylene / Q000032:analysis*; D022882:Trihalomethanes / Q000032:analysis*; D014874:Water Pollutants, Chemical / Q000032:analysis*
chemical_list: D000393:Air Pollutants; D022882:Trihalomethanes; D014874:Water Pollutants, Chemical; D002734:Chlorophyll; D014241:Trichloroethylene; C032707:chlorodibromomethane; D002725:Chloroform; D013750:Tetrachloroethylene; C015044:bromoform; D000077194:Chlorophyll A