Sources and fate of polycyclic aromatic hydrocarbons in the Antarctic and Southern Ocean atmosphere
Producción Científica Polycyclic aromatic hydrocarbons (PAHs) are a geochemically relevant family of semivolatile compounds originating from fossil fuels, biomass burning, and their incomplete combustion, as well as biogenic sources. Even though PAHs are ubiquitous in the environment, there are no p...
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ftunivvalladolid:oai:uvadoc.uva.es:10324/65155 2024-02-27T08:35:03+00:00 Sources and fate of polycyclic aromatic hydrocarbons in the Antarctic and Southern Ocean atmosphere Cabrerizo, Ana Galbán‐Malagón, Cristóbal Del Vento, Sabino Dachs, Jordi 2014 application/pdf https://uvadoc.uva.es/handle/10324/65155 https://doi.org/10.1002/2014GB004910 eng eng https://doi.org/10.1002/2014GB004910 Global Biogeochemical Cycles. December 2014. Volume 28, Issue 12, Pages 1424 - 1436 0886-6236 https://uvadoc.uva.es/handle/10324/65155 1424 12 1436 Global Biogeochemical Cycles 28 1944-9224 info:eu-repo/semantics/openAccess American Geophysical Union info:eu-repo/semantics/article info:eu-repo/semantics/publishedVersion 2014 ftunivvalladolid https://doi.org/10.1002/2014GB004910 2024-01-31T00:29:02Z Producción Científica Polycyclic aromatic hydrocarbons (PAHs) are a geochemically relevant family of semivolatile compounds originating from fossil fuels, biomass burning, and their incomplete combustion, as well as biogenic sources. Even though PAHs are ubiquitous in the environment, there are no previous studies of their occurrence in the Southern Ocean and Antarctic atmosphere. Here we show the gas and aerosol phase PAHs concentrations obtained from three sampling cruises in the Southern Ocean (Weddell, Bellingshausen, and South Scotia Seas), and two sampling campaigns at Livingston Island (Southern Shetlands). This study shows an important variability of the atmospheric concentrations with higher concentrations in the South Scotia and northern Weddell Seas than in the Bellingshausen Sea. The assessment of the gas-particle partitioning of PAHs suggests that aerosol elemental carbon contribution is modest due to its low concentrations. Over the ocean, the atmospheric concentrations do not show a temperature dependence, which is consistent with an important role of long-range atmospheric transport of PAHs. Conversely, over land at Livingston Island, the PAHs gas phase concentrations increase when the temperature increases, consistently with the presence of local diffusive sources. The use of fugacity samplers allowed the determination of the air-soil and air-snow fugacity ratios of PAHs showing that there is a significant volatilization of lighter molecular weight PAHs from soil and snow during the austral summer. The higher volatilization, observed in correspondence of sites where the organic matter content in soil is higher, suggests that there may be a biogenic source of some PAHs. The volatilization of PAHs from soil and snow is sufficient to support the atmospheric occurrence of PAHs over land but may have a modest regional influence on the atmospheric occurrence of PAHs over the Southern Ocean. Article in Journal/Newspaper Antarc* Antarctic Bellingshausen Sea Livingston Island Southern Ocean UVaDOC - Repositorio Documental de la Universidad de Valladolid Antarctic Austral Bellingshausen Sea Livingston Island ENVELOPE(-60.500,-60.500,-62.600,-62.600) Southern Ocean The Antarctic Weddell Global Biogeochemical Cycles 28 12 1424 1436 |
institution |
Open Polar |
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UVaDOC - Repositorio Documental de la Universidad de Valladolid |
op_collection_id |
ftunivvalladolid |
language |
English |
description |
Producción Científica Polycyclic aromatic hydrocarbons (PAHs) are a geochemically relevant family of semivolatile compounds originating from fossil fuels, biomass burning, and their incomplete combustion, as well as biogenic sources. Even though PAHs are ubiquitous in the environment, there are no previous studies of their occurrence in the Southern Ocean and Antarctic atmosphere. Here we show the gas and aerosol phase PAHs concentrations obtained from three sampling cruises in the Southern Ocean (Weddell, Bellingshausen, and South Scotia Seas), and two sampling campaigns at Livingston Island (Southern Shetlands). This study shows an important variability of the atmospheric concentrations with higher concentrations in the South Scotia and northern Weddell Seas than in the Bellingshausen Sea. The assessment of the gas-particle partitioning of PAHs suggests that aerosol elemental carbon contribution is modest due to its low concentrations. Over the ocean, the atmospheric concentrations do not show a temperature dependence, which is consistent with an important role of long-range atmospheric transport of PAHs. Conversely, over land at Livingston Island, the PAHs gas phase concentrations increase when the temperature increases, consistently with the presence of local diffusive sources. The use of fugacity samplers allowed the determination of the air-soil and air-snow fugacity ratios of PAHs showing that there is a significant volatilization of lighter molecular weight PAHs from soil and snow during the austral summer. The higher volatilization, observed in correspondence of sites where the organic matter content in soil is higher, suggests that there may be a biogenic source of some PAHs. The volatilization of PAHs from soil and snow is sufficient to support the atmospheric occurrence of PAHs over land but may have a modest regional influence on the atmospheric occurrence of PAHs over the Southern Ocean. |
format |
Article in Journal/Newspaper |
author |
Cabrerizo, Ana Galbán‐Malagón, Cristóbal Del Vento, Sabino Dachs, Jordi |
spellingShingle |
Cabrerizo, Ana Galbán‐Malagón, Cristóbal Del Vento, Sabino Dachs, Jordi Sources and fate of polycyclic aromatic hydrocarbons in the Antarctic and Southern Ocean atmosphere |
author_facet |
Cabrerizo, Ana Galbán‐Malagón, Cristóbal Del Vento, Sabino Dachs, Jordi |
author_sort |
Cabrerizo, Ana |
title |
Sources and fate of polycyclic aromatic hydrocarbons in the Antarctic and Southern Ocean atmosphere |
title_short |
Sources and fate of polycyclic aromatic hydrocarbons in the Antarctic and Southern Ocean atmosphere |
title_full |
Sources and fate of polycyclic aromatic hydrocarbons in the Antarctic and Southern Ocean atmosphere |
title_fullStr |
Sources and fate of polycyclic aromatic hydrocarbons in the Antarctic and Southern Ocean atmosphere |
title_full_unstemmed |
Sources and fate of polycyclic aromatic hydrocarbons in the Antarctic and Southern Ocean atmosphere |
title_sort |
sources and fate of polycyclic aromatic hydrocarbons in the antarctic and southern ocean atmosphere |
publishDate |
2014 |
url |
https://uvadoc.uva.es/handle/10324/65155 https://doi.org/10.1002/2014GB004910 |
long_lat |
ENVELOPE(-60.500,-60.500,-62.600,-62.600) |
geographic |
Antarctic Austral Bellingshausen Sea Livingston Island Southern Ocean The Antarctic Weddell |
geographic_facet |
Antarctic Austral Bellingshausen Sea Livingston Island Southern Ocean The Antarctic Weddell |
genre |
Antarc* Antarctic Bellingshausen Sea Livingston Island Southern Ocean |
genre_facet |
Antarc* Antarctic Bellingshausen Sea Livingston Island Southern Ocean |
op_relation |
https://doi.org/10.1002/2014GB004910 Global Biogeochemical Cycles. December 2014. Volume 28, Issue 12, Pages 1424 - 1436 0886-6236 https://uvadoc.uva.es/handle/10324/65155 1424 12 1436 Global Biogeochemical Cycles 28 1944-9224 |
op_rights |
info:eu-repo/semantics/openAccess American Geophysical Union |
op_doi |
https://doi.org/10.1002/2014GB004910 |
container_title |
Global Biogeochemical Cycles |
container_volume |
28 |
container_issue |
12 |
container_start_page |
1424 |
op_container_end_page |
1436 |
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1792041469097279488 |