Biogeochemical controls of the transport and cycling of persistent organic pollutants in the polar oceans
Humanity is currently using more than 200000 synthetic organic compounds in many industrial, agricultural and domestic applications. Many of these chemicals reach the environment and have a harmful effect on ecosystems and humans. Among them, the group of persistent organic pollutants (POPs) compris...
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ftupcatalunya:oai:www.tdx.cat:10803/129733 2023-11-12T04:06:22+01:00 Biogeochemical controls of the transport and cycling of persistent organic pollutants in the polar oceans Galbán Malagón, Cristóbal Dachs, Jordi Universitat Politècnica de Catalunya. Departament d'Enginyeria Hidràulica, Marítima i Ambiental 2014-02-06T12:01:53Z 365 p. application/pdf http://hdl.handle.net/10803/129733 eng eng Universitat Politècnica de Catalunya http://hdl.handle.net/10803/129733 B 5032-2014 L'accés als continguts d'aquesta tesi queda condicionat a l'acceptació de les condicions d'ús establertes per la següent llicència Creative Commons: http://creativecommons.org/licenses/by-nc/3.0/es/ info:eu-repo/semantics/openAccess TDX (Tesis Doctorals en Xarxa) 504 info:eu-repo/semantics/doctoralThesis info:eu-repo/semantics/publishedVersion 2014 ftupcatalunya 2023-10-16T17:17:11Z Humanity is currently using more than 200000 synthetic organic compounds in many industrial, agricultural and domestic applications. Many of these chemicals reach the environment and have a harmful effect on ecosystems and humans. Among them, the group of persistent organic pollutants (POPs) comprises several families of compounds that have physical and chemical properties that give them the ability to be distributed and impact globally (semivolatility, high persistence and bioaccumulation capacity due to their hydrophobicity). In the present thesis, the coupling of atmospheric transport and biogeochemical cycles in the Arctic and Southern Ocean has been studied for Hexachlorocyclohexanes (HCHs), Hexachlorobenzene (HCB) and Polychlorinated Biphenyls (PCBs). Three oceanographic cruises were conducted, one in the North Atlantic and the Arctic Ocean (2007) and two in the Southern Ocean surrounding the Antarctic Peninsula (2008 and 2009). During these campaigns, air (gas and particulate), water (dissolved and particulate) and biota (phytoplankton) were sampled simultaneously allowing to report a complete picture of POPs cycling in polar areas. In the case of the Southern Ocean, the largest data set available for PCBs, HCH and HCB has been generated. The atmospheric and seawater concentrations were low, among the lowest reported for the Polar Oceans, and in the case of the Southern Ocean there is a clear historical trend of decreasing concentrations, consistent with reduced emissions in source regions. Long range atmospheric transport was identified as the main POPs input to polar ecosystems agreeing with previous works. However, it has been found that secondary local sources from soil and snow influences strongly the atmospheric concentrations overland in the Antarctic region, and over the adjacent Southern ocean in the case of HCHs. Atmospheric residence times calculated from the measurements were in agreement with the prediction from environmental fate models. The atmospheric residence times were longer for the ... Doctoral or Postdoctoral Thesis Antarc* Antarctic Antarctic Peninsula Arctic Arctic Ocean North Atlantic Phytoplankton Southern Ocean Universitat Politècnica de Catalunya (UPC): Theses and Dissertations Online (TDX) Arctic Antarctic Southern Ocean The Antarctic Arctic Ocean Antarctic Peninsula |
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Open Polar |
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Universitat Politècnica de Catalunya (UPC): Theses and Dissertations Online (TDX) |
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language |
English |
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504 Galbán Malagón, Cristóbal Biogeochemical controls of the transport and cycling of persistent organic pollutants in the polar oceans |
topic_facet |
504 |
description |
Humanity is currently using more than 200000 synthetic organic compounds in many industrial, agricultural and domestic applications. Many of these chemicals reach the environment and have a harmful effect on ecosystems and humans. Among them, the group of persistent organic pollutants (POPs) comprises several families of compounds that have physical and chemical properties that give them the ability to be distributed and impact globally (semivolatility, high persistence and bioaccumulation capacity due to their hydrophobicity). In the present thesis, the coupling of atmospheric transport and biogeochemical cycles in the Arctic and Southern Ocean has been studied for Hexachlorocyclohexanes (HCHs), Hexachlorobenzene (HCB) and Polychlorinated Biphenyls (PCBs). Three oceanographic cruises were conducted, one in the North Atlantic and the Arctic Ocean (2007) and two in the Southern Ocean surrounding the Antarctic Peninsula (2008 and 2009). During these campaigns, air (gas and particulate), water (dissolved and particulate) and biota (phytoplankton) were sampled simultaneously allowing to report a complete picture of POPs cycling in polar areas. In the case of the Southern Ocean, the largest data set available for PCBs, HCH and HCB has been generated. The atmospheric and seawater concentrations were low, among the lowest reported for the Polar Oceans, and in the case of the Southern Ocean there is a clear historical trend of decreasing concentrations, consistent with reduced emissions in source regions. Long range atmospheric transport was identified as the main POPs input to polar ecosystems agreeing with previous works. However, it has been found that secondary local sources from soil and snow influences strongly the atmospheric concentrations overland in the Antarctic region, and over the adjacent Southern ocean in the case of HCHs. Atmospheric residence times calculated from the measurements were in agreement with the prediction from environmental fate models. The atmospheric residence times were longer for the ... |
author2 |
Dachs, Jordi Universitat Politècnica de Catalunya. Departament d'Enginyeria Hidràulica, Marítima i Ambiental |
format |
Doctoral or Postdoctoral Thesis |
author |
Galbán Malagón, Cristóbal |
author_facet |
Galbán Malagón, Cristóbal |
author_sort |
Galbán Malagón, Cristóbal |
title |
Biogeochemical controls of the transport and cycling of persistent organic pollutants in the polar oceans |
title_short |
Biogeochemical controls of the transport and cycling of persistent organic pollutants in the polar oceans |
title_full |
Biogeochemical controls of the transport and cycling of persistent organic pollutants in the polar oceans |
title_fullStr |
Biogeochemical controls of the transport and cycling of persistent organic pollutants in the polar oceans |
title_full_unstemmed |
Biogeochemical controls of the transport and cycling of persistent organic pollutants in the polar oceans |
title_sort |
biogeochemical controls of the transport and cycling of persistent organic pollutants in the polar oceans |
publisher |
Universitat Politècnica de Catalunya |
publishDate |
2014 |
url |
http://hdl.handle.net/10803/129733 |
geographic |
Arctic Antarctic Southern Ocean The Antarctic Arctic Ocean Antarctic Peninsula |
geographic_facet |
Arctic Antarctic Southern Ocean The Antarctic Arctic Ocean Antarctic Peninsula |
genre |
Antarc* Antarctic Antarctic Peninsula Arctic Arctic Ocean North Atlantic Phytoplankton Southern Ocean |
genre_facet |
Antarc* Antarctic Antarctic Peninsula Arctic Arctic Ocean North Atlantic Phytoplankton Southern Ocean |
op_source |
TDX (Tesis Doctorals en Xarxa) |
op_relation |
http://hdl.handle.net/10803/129733 B 5032-2014 |
op_rights |
L'accés als continguts d'aquesta tesi queda condicionat a l'acceptació de les condicions d'ús establertes per la següent llicència Creative Commons: http://creativecommons.org/licenses/by-nc/3.0/es/ info:eu-repo/semantics/openAccess |
_version_ |
1782327455339511808 |