| Title: | Net volatilization of PAHs from the North Pacific to the Arctic Ocean observed by passive sampling |
| Author(s): | Zheng H; Cai M; Zhao W; Khairy M; Chen M; Deng H; Lohmann R; |
| Address: | "State Key Laboratory of Marine Environmental Science, Xiamen University, Xiamen, 361102, China; College of Ocean and Earth Science, Xiamen University, Xiamen, 361102, China. School of Environmental Science and Engineering, Zhejiang Gongshang University, Hangzhou, 310018, China. Graduate School of Oceanography, University of Rhode Island, Narragansett, RI, 02882-1197, United States; Department of Environmental Sciences, Faculty of Science, Alexandria University, 21511, Moharam Bek, Alexandria, Egypt. Graduate School of Oceanography, University of Rhode Island, Narragansett, RI, 02882-1197, United States. Electronic address: rlohmann@uri.edu" |
| DOI: | 10.1016/j.envpol.2021.116728 |
| ISSN/ISBN: | 1873-6424 (Electronic) 0269-7491 (Linking) |
| Abstract: | "The North Pacific-Arctic Oceans are important compartments for semi-volatile organic compounds' (SVOCs) global marine inventory, but whether they act as a 'source' or 'sink' remains controversial. To study the air-sea exchange and fate of SVOCs during their poleward long-range transport, low-altitude atmosphere and surface seawater were measured for polycyclic aromatic hydrocarbons (PAHs) by passive sampling from July to September in 2014. Gaseous PAH concentrations (0.67-13 ng m(-3)) were dominated by phenanthrene (Phe) and fluorene (Flu), which displayed an inverse correlation with latitude, as well as a significant linear relationship with partial pressure and inverse temperature. Concentrations of PAHs in seawater (1.8-16 ng L(-1)) showed regional characteristics, with higher levels near the East Asia and lower values in the Bering Strait. The potential impact from the East Asian monsoon was suggested for gaseous PAHs, which - similar to PAHs in surface seawater - were derived from combustion sources. In addition, the data implied net volatilization of PAHs from seawater into the air along the entire cruise; fluxes displayed a similar pattern to regional and monthly distribution of PAHs in seawater. Our results further emphasized that air-sea exchange is an important process for PAHs in the open marine environments" |
| Keywords: | "*Air Pollutants/analysis Arctic Regions Environmental Monitoring Asia, Eastern Oceans and Seas Pacific Ocean *Polycyclic Aromatic Hydrocarbons/analysis Seawater Volatilization Air-sea exchange High-latitude marine environment Long-range transport Low-dens;" |
| Notes: | "MedlineZheng, Haowen Cai, Minggang Zhao, Wenlu Khairy, Mohammed Chen, Mian Deng, Hengxiang Lohmann, Rainer eng England 2021/02/22 Environ Pollut. 2021 May 1; 276:116728. doi: 10.1016/j.envpol.2021.116728. Epub 2021 Feb 11" |
