title: Spatio-temporal distributions of chlorofluorocarbons and methyl iodide in the Changjiang (Yangtze River) estuary and its adjacent marine area.
abstract: Temporal and spatial distribution patterns of volatile halogenated organic compounds (VHOCs), such as dichlorodifluoromethane (CFC-12), trichlorofluoromethane (CFC-11), trichlorotrifluoroethane (CFC-113), and methyl iodide (CH3I), in the Changjiang (Yangtze River) estuary and its adjacent marine area were measured during two cruises from 21 February to 10 March 2014 and from 10 to 21 July 2014. VHOC concentrations showed seasonal variation with higher values during winter. VHOC distributions evidently decreased along the freshwater plume from the river mouth to the open sea and from inshore to offshore regions. VHOC distributions were obviously influenced by the Changjiang runoff, anthropogenic inputs, and biological release of phytoplankton. The study area was a net sink for CFC-12 and CFC-11, but a net source for atmospheric CH3I during the study periods.
authors.affiliation: Key Laboratory of Marine Chemistry Theory and Technology, Ocean University of China, Ministry of Education/Qingdao Collaborative Innovation Center of Marine Science and Technology, Qingdao 266100, China; Institute of Marine Chemistry, Ocean University of China, Qingdao 266100, China.
authors.forename: Da
authors.initials: D
authors.lastname: Yuan
authors.affiliation: Key Laboratory of Marine Chemistry Theory and Technology, Ocean University of China, Ministry of Education/Qingdao Collaborative Innovation Center of Marine Science and Technology, Qingdao 266100, China; Laboratory of Marine Ecology and Environmental Science, Qingdao National Laboratory for Marine Science and Technology, Qingdao 266200, China; Institute of Marine Chemistry, Ocean University of China, Qingdao 266100, China. Electronic address: gpyang@ouc.edu.cn.
authors.forename: Gui-Peng
authors.initials: GP
authors.lastname: Yang
authors.affiliation: Key Laboratory of Marine Chemistry Theory and Technology, Ocean University of China, Ministry of Education/Qingdao Collaborative Innovation Center of Marine Science and Technology, Qingdao 266100, China; Institute of Marine Chemistry, Ocean University of China, Qingdao 266100, China.
authors.forename: Zhen
authors.initials: Z
authors.lastname: He
mesh_terms: D017402:Chlorofluorocarbons / Q000032:analysis*; D063366:Estuaries; D006847:Hydrocarbons, Iodinated / Q000032:analysis*; D009792:Oceans and Seas; D010839:Phytoplankton; D045483:Rivers / Q000737:chemistry*; D012621:Seasons; D014874:Water Pollutants, Chemical / Q000032:analysis*
chemical_list: D017402:Chlorofluorocarbons; D006847:Hydrocarbons, Iodinated; D014874:Water Pollutants, Chemical; C014055:methyl iodide
keywords: Changjiang (Yangtze River) estuary; Chlorofluorocarbons; Distribution; Methyl iodide; Sea-to-air flux