分层(种子)
水柱
环境科学
污染物
海水
环境化学
生物地球化学循环
海洋学
溶解有机碳
化学
地质学
种子休眠
植物
发芽
有机化学
休眠
生物
作者
Mengyang Liu,Haowen Zheng,Minggang Cai,Kmy Leung,Yi-Fan Li,Meng Yan,Zi-Feng Zhang,Kai Zhang,Meng Chen,Hongwei Ke
标识
DOI:10.1021/acs.est.3c03237
摘要
Ocean stratification plays a crucial role in many biogeochemical processes of dissolved matter, but our understanding of its impact on widespread organic pollutants, such as polycyclic aromatic hydrocarbons (PAHs), remains limited. By analyzing dissolved PAHs collected from global oceans and marginal seas, we found different patterns in vertical distributions of PAHs in relation to ocean primary productivity and stratification index. Notably, a significant positive logarithmic relationship (R2 = 0.50, p < 0.05) was observed between the stratification index and the PAH stock. To further investigate the impact of ocean stratification on PAHs, we developed a deep learning neural network model. This model incorporated input variables determining the state of the seawater or the stock of PAHs. The modeled PAH stocks displayed substantial agreement with the observed values (R2 ≥ 0.92), suggesting that intensified stratification could prompt the accumulation of PAHs in the water column. Given the amplified effect of global warming, it is imperative to give more attention to increased ocean stratification and its impact on the environmental fate of organic pollutants.
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