|Title:||A unique seasonal pattern in dissolved elemental mercury in the South China Sea, a tropical and monsoon-dominated marginal sea||Authors:||Tseng, C.M.
|Issue Date:||2013||Journal Volume:||40||Journal Issue:||1||Start page/Pages:||167-172||Source:||Geophysical Research Letters||Abstract:||
A unique seasonal pattern in dissolved elemental mercury (DEM) was observed in the tropical monsoon-dominated South China Sea (SCS). The DEM concentration varied seasonally, with a high in summer of 160 ± 40 fM (net evasion 580 ± 120 pmol m-2 d-1, n = 4) and a low in winter of 60 ± 30 fM (net invasion -180 ± 110, n = 4) and showed a positive correlation with sea surface temperature (SST). The elevated DEM concentration in summer appears mainly abiologically driven. In winter, the SCS acts as a sink of atmosphere Hg0 as a result of low SST and high wind of the year, enhanced vertical mixing, and elevated atmospheric gaseous elemental mercury. Annually, the SCS serves as a source of Hg0 to the atmosphere of 300 ± 50 pmol m-2 d-1 (385 ± 64kmol Hg yr -1, ~2.6% of global emission in ~1% of global ocean area), suggesting high regional Hg pollution impacts from the surrounding Mainland (mostly China). © 2013. American Geophysical Union. All Rights Reserved.
|DOI:||10.1029/2012GL054457||SDG/Keyword:||Elemental mercury; Gaseous elemental mercury; Global emissions; Positive correlations; Sea surface temperature (SST); Seasonal patterns; South China sea; Vertical mixing; Atmospheric temperature; Climate change; Mercury (metal); digital elevation model; marginal sea; mercury (element); sea surface temperature; seasonal variation; vertical mixing; Pacific Ocean; South China Sea
|Appears in Collections:||海洋研究所|
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