Isolating different natural and anthropogenic PAHs in the sediments from the northern Bering-Chukchi margin: Implications for transport processes in a warming Arctic

Climate change influence on the levels and trends of persistent organic pollutants (POPs) and chemicals of emerging Arctic concern (CEACs) in the Arctic physical environment – a review

“…In an earlier study, using a combination of statistical fingerprinting techniques and MODIS satellite images, Sofowote et al (2011) 90 attributed significant contributions of retene in air at the Canadian sub-Arctic site of Little Fox Lake in autumn 2008 to wildfires occurring in British Columbia, the western United States, and north-eastern Asia during this time. Lin et al (2020) 91 used an integrated source apportionment technique to reveal five potential sources of PAHs found in 34 surface sediments from the northern Bering–Chukchi margin. The northeast Chukchi Sea exclusively had PAH profiles indicative of contributions from softwood combustion (characterized by retene), a likely result of the increasing wildfires in Alaska related to climate change.…”

“…109,110 The increased discharge volume and flow velocity from rivers is expected to bring with it an increased contaminant load of both dissolved and particle-bound contaminants. 111 The increased contaminant load has been hypothesized to include remobilized legacy POPs retained in sediments, 111 PAHs from sediment-laden ice and coal deposits eroded by deglaciation; 91 as well as POPs and CEACs with sources close to settlements. 109,111–113…”

Source Apportionment and Lung Cancer Risk Assessment of PM2.5-Bound Polycyclic Aromatic Hydrocarbons in an Industrial City in Northwestern China

“…PAHs are signi cant organic pollutants in ambient air (Manisalidis et al 2020, Yadav et al 2020, Zhou et al 2022, and mainly exist in the vapor and particle phases. They are common contaminants that can pollute areas not only near their sources, but also at receptor sites far away from their sources (Lin et al 2020), as they can be transported long distances (Shrivastava et al 2017). In addition, long-term and lowlevel exposure to PAHs may cause chronic health effects such as lung cancer, poor fertility outcomes, intestinal damage (Liu et al 2021), and DNA damage (Wang et al 2020b).…”

Particulate Export of PAHs Firstly Traced by 210Po/210Pb Disequilibrium: Implication on the “Shelf Sink Effect” in the Arctic Ocean

“…Polycyclic aromatic hydrocarbons (PAHs) are a class of semivolatile organic compounds of great concern due to their toxicity and carcinogenic effects on humans and ecosystems (Cabrerizo et al., 2014; Cai et al., 2016; Gong et al., 2021; Gonzalez‐Gaya et al., 2016; Gustafsson et al., 1997; Ma et al., 2013; Wang et al., 2020). They have ongoing emissions from pyrogenic or petrogenic sources, and could arrive in polar regions through long‐range transport through the air or ocean currents, as their reported existence in Arctic seawater, marine sediment, freshwater, snow, air, soil, and biota (Balmer et al., 2019; Ding et al., 2007; Ke et al., 2017; Lin et al., 2020; Lohmann et al., 2009; Rigét et al., 2019; Yunker et al., 2002; Zheng et al., 2021). Important source regions of PAHs surround the Arctic Ocean, Eurasia, and North America, accounting for 30% of global pollutant emissions (Chen et al., 2021; Shen et al., 2013; Zhang & Tao, 2009).…”

“…seawater, marine sediment, freshwater, snow, air, soil, and biota (Balmer et al, 2019;Ding et al, 2007;Ke et al, 2017;Lin et al, 2020;Lohmann et al, 2009;Rigét et al, 2019;Yunker et al, 2002;Zheng et al, 2021). Important source regions of PAHs surround the Arctic Ocean, Eurasia, and North America, accounting for 30% of global pollutant emissions (Chen et al, 2021;Shen et al, 2013;Zhang & Tao, 2009).…”