2026-05-05T20:54:36Zhttps://uvadoc.uva.es/oai/request
oai:uvadoc.uva.es:10324/748162025-09-05T10:40:30Zcom_10324_1173com_10324_931com_10324_894col_10324_1371
UVaDOC author Casal, Paulo author Cabrerizo Pastor, Ana author Vila-Costa, Maria author Pizarro, Mariana author Jiménez, Begoña author Dachs, Jordi 2025-02-03T16:13:29Z 2025-02-03T16:13:29Z 2018 Environmental Science & Technology 2018 52 (21), 12327-12337 0013-936X https://uvadoc.uva.es/handle/10324/74816 10.1021/acs.est.8b03640 12327 21 12337 Environmental Science & Technology 52 1520-5851 The atmosphere−land−ocean dynamics of semivolatile organic compounds in polar regions is poorly understood, also for the abundant and ubiquitous polycyclic aromatic hydrocarbons (PAHs). We report the concentrations and fluxes of PAHs in a polar coastal ecosystem (Livingston Island, Antarctica). From late spring (December 2014) to late summer (February 2015), we sampled air, snow, coastal seawater, plankton, and the fugacity in soils and snow. The concentrations of PAHs in seawater were low but increased during the austral summer. The PAH concentrations in snow were significantly higher than in coastal seawater. Soil−air fugacity ratios showed a net volatilization of PAH when soils were covered with lichens, and close to air−soil equilibrium for bare soils. Concentrations in surface snow were also close to equilibrium with atmospheric PAHs. Conversely, there was a net diffusive deposition of PAHs to coastal seawater during late spring, but a net volatilization from seawater during late summer. Volatilization fluxes were correlated with seawater temperature and salinity, consistent with a key role of snowmelt to the fluxes and dissolved phase concentrations during the austral summer. The comprehensive assessment provided here shows that the fugacity amplification in snow is transferred to soils and coastal seawater supporting PAH concentrations and fluxes. eng Pivotal Role of Snow Deposition and Melting Driving Fluxes of Polycyclic Aromatic Hydrocarbons at Coastal Livingston Island (Antarctica) info:eu-repo/semantics/article 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URL https://uvadoc.uva.es/bitstream/10324/74816/1/casal-et-al-2018-pivotal-role-of-snow-deposition-and-melting-driving-fluxes-of-polycyclic-aromatic-hydrocarbons-at%20%281%29.pdf File MD5 cdf0e673167b9d3803057134b3fbd8e2 5339261 application/pdf casal-et-al-2018-pivotal-role-of-snow-deposition-and-melting-driving-fluxes-of-polycyclic-aromatic-hydrocarbons-at (1).pdf