Permafrost Thaw Dominates Mercury Emission in Tibetan Thermokarst Ponds.

  title={Permafrost Thaw Dominates Mercury Emission in Tibetan Thermokarst Ponds.},
  author={Zhijia Ci and Fei Peng and Xian Xue and Xiaoshan Zhang},
  journal={Environmental science \& technology},
Increasing evidences show that warming is driving Hg release from the cryosphere. However, Hg cycling in thawing permafrost is less understood to date. Here we show that permafrost thaw dominantly supplied no-running thermokarst ponds by permafrost melt waters (PMWs) with high concentration of photo-reducible Hg (PRHg) and subsequently controlled Hg(0) emissions in the Tibetan Plateau. This study was motivated by field survey suggesting that thermokarst ponds as recipient aquatic systems of… 
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