title: Fate of Polycyclic Aromatic Hydrocarbons in Seawater from the Western Pacific to the Southern Ocean (17.5°N to 69.2°S) and Their Inventories on the Antarctic Shelf.
abstract: Semivolatile organic compounds such as polycyclic aromatic hydrocarbons (PAHs) have the potential to reach pristine environments through long-range transport. To investigate the long-range transport of the PAHs and their fate in Antarctic seawater, dissolved PAHs in the surface waters from the western Pacific to the Southern Ocean (17.5°N to 69.2°S), as well as down to 3500 m PAH profiles in Prydz Bay and the adjacent Southern Ocean, were observed during the 27th Chinese National Antarctic Research Expedition in 2010. The concentrations of Σ9PAH in the surface seawater ranged from not detected (ND) to 21 ng L(-1), with a mean of 4.3 ng L(-1); and three-ring PAHs were the most abundant compounds. Samples close to the Australian mainland displayed the highest levels across the cruise. PAHs originated mainly from pyrogenic sources, such as grass, wood, and coal combustion. Vertical profiles of PAHs in Prydz Bay showed a maximum at a depth of 50 m and less variance with depth. In general, we inferred that the water masses as well as the phytoplankton were possible influencing factors on PAH surface-enrichment depth-depletion distribution. Inventory estimation highlighted the contribution of intermediate and deep seawater on storing PAHs in seawater from Prydz Bay, and suggested that climate change rarely shows the rapid release of the PAHs currently stored in the major reservoirs (intermediate and deep seawater).
authors: Minggang
authors: M
authors: Cai
authors: Mengyang
authors: M
authors: Liu
authors: Qingquan
authors: Q
authors: Hong
authors: Third Institute of Oceanography, State Oceanic Administration, Xiamen 361005, P.R. China.
authors: Jing
authors: J
authors: Lin
authors: Peng
authors: P
authors: Huang
authors: Jiajun
authors: J
authors: Hong
authors: Jun
authors: J
authors: Wang
authors: Wenlu
authors: W
authors: Zhao
authors: Meng
authors: M
authors: Chen
authors: SOA Key Laboratory for Polar Science, Polar Research Institute of China , Shanghai 200136, P.R. China.
authors: Minghong
authors: M
authors: Cai
authors: Jun
authors: J
authors: Ye
mesh_terms: D057231:Climate Change; D009792:Oceans and Seas; D010839:Phytoplankton; D011084:Polycyclic Aromatic Hydrocarbons; D012623:Seawater
chemical_list: D011084:Polycyclic Aromatic Hydrocarbons