Detecting Hydrological Connectivity in Polar Environments Using Silicon Isotopes
Climate change is having a direct impact on hydrological connectivity in permafrost environments1. In this work, we combine soil physics and silicon isotope geochemistry to locate pathways of hydrological connectivity in permafrost soils at Eight Mile Lake, Alaska. Silicon in soil pore waters (<...
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ftunivlouvain:oai:dial.uclouvain.be:boreal:268697 2024-05-12T08:09:44+00:00 Detecting Hydrological Connectivity in Polar Environments Using Silicon Isotopes Opfergelt, Sophie Hirst, Catherine Villani, Maëlle Monhonval, Arthur Mauclet, Elisabeth Thomas, Maxime Ledman, Justin Schuur, Edward AGU Fall Meeting 2022 UCL - SST/ELI/ELIE - Environmental Sciences 2022 http://hdl.handle.net/2078.1/268697 eng eng info:eu-repo/grantAgreement/European Research Council (ERC)/European Union’s Horizon 2020 research and innovation programme/grant agreement nâ—¦714617 boreal:268697 http://hdl.handle.net/2078.1/268697 Permafrost silicon isotopes colloids connectivity info:eu-repo/semantics/conferenceObject 2022 ftunivlouvain 2024-04-17T16:32:11Z Climate change is having a direct impact on hydrological connectivity in permafrost environments1. In this work, we combine soil physics and silicon isotope geochemistry to locate pathways of hydrological connectivity in permafrost soils at Eight Mile Lake, Alaska. Silicon in soil pore waters (< 0.2 µm) can be a colloidal fraction (~ 0.2 µm to ~ 1 nm) and a truly dissolved fraction of silicic acid (~ < 1 nm), with an isotope fractionation associated with colloidal amorphous Si formation. Here we propose that soil pore waters contain different proportions of these Si pools during freezing and thawing, and apply this conceptual framework to detect the freezing and thawing conditions in permafrost soils during winter months. We propose that this approach could be applied in other cold, extreme environments to detect changes in water and nutrient flow paths. 1 Walvoord, M.A. and Kurylyk, B.L., 2016. Hydrologic impacts of thawing permafrost—A review. Vadose Zone Journal, 15(6). Conference Object permafrost Alaska DIAL@UCLouvain (Université catholique de Louvain) |
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Open Polar |
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DIAL@UCLouvain (Université catholique de Louvain) |
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ftunivlouvain |
language |
English |
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Permafrost silicon isotopes colloids connectivity |
spellingShingle |
Permafrost silicon isotopes colloids connectivity Opfergelt, Sophie Hirst, Catherine Villani, Maëlle Monhonval, Arthur Mauclet, Elisabeth Thomas, Maxime Ledman, Justin Schuur, Edward AGU Fall Meeting 2022 Detecting Hydrological Connectivity in Polar Environments Using Silicon Isotopes |
topic_facet |
Permafrost silicon isotopes colloids connectivity |
description |
Climate change is having a direct impact on hydrological connectivity in permafrost environments1. In this work, we combine soil physics and silicon isotope geochemistry to locate pathways of hydrological connectivity in permafrost soils at Eight Mile Lake, Alaska. Silicon in soil pore waters (< 0.2 µm) can be a colloidal fraction (~ 0.2 µm to ~ 1 nm) and a truly dissolved fraction of silicic acid (~ < 1 nm), with an isotope fractionation associated with colloidal amorphous Si formation. Here we propose that soil pore waters contain different proportions of these Si pools during freezing and thawing, and apply this conceptual framework to detect the freezing and thawing conditions in permafrost soils during winter months. We propose that this approach could be applied in other cold, extreme environments to detect changes in water and nutrient flow paths. 1 Walvoord, M.A. and Kurylyk, B.L., 2016. Hydrologic impacts of thawing permafrost—A review. Vadose Zone Journal, 15(6). |
author2 |
UCL - SST/ELI/ELIE - Environmental Sciences |
format |
Conference Object |
author |
Opfergelt, Sophie Hirst, Catherine Villani, Maëlle Monhonval, Arthur Mauclet, Elisabeth Thomas, Maxime Ledman, Justin Schuur, Edward AGU Fall Meeting 2022 |
author_facet |
Opfergelt, Sophie Hirst, Catherine Villani, Maëlle Monhonval, Arthur Mauclet, Elisabeth Thomas, Maxime Ledman, Justin Schuur, Edward AGU Fall Meeting 2022 |
author_sort |
Opfergelt, Sophie |
title |
Detecting Hydrological Connectivity in Polar Environments Using Silicon Isotopes |
title_short |
Detecting Hydrological Connectivity in Polar Environments Using Silicon Isotopes |
title_full |
Detecting Hydrological Connectivity in Polar Environments Using Silicon Isotopes |
title_fullStr |
Detecting Hydrological Connectivity in Polar Environments Using Silicon Isotopes |
title_full_unstemmed |
Detecting Hydrological Connectivity in Polar Environments Using Silicon Isotopes |
title_sort |
detecting hydrological connectivity in polar environments using silicon isotopes |
publishDate |
2022 |
url |
http://hdl.handle.net/2078.1/268697 |
genre |
permafrost Alaska |
genre_facet |
permafrost Alaska |
op_relation |
info:eu-repo/grantAgreement/European Research Council (ERC)/European Union’s Horizon 2020 research and innovation programme/grant agreement n◦714617 boreal:268697 http://hdl.handle.net/2078.1/268697 |
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1798853047372218368 |