Antarctic permafrost degassing in Taylor Valley by extensive soil gas investigation
Ongoing studies conducted in northern polar regions reveal that permafrost stability plays a key role in the modern carbon cycle as it potentially stores considerable quantities of greenhouse gases. Rapid and recent warming of the Arctic permafrost is resulting in significant greenhouse gas emission...
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Online Access: | https://hdl.handle.net/11573/1677990 https://doi.org/10.1016/j.scitotenv.2022.161345 |
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ftunivromairis:oai:iris.uniroma1.it:11573/1677990 2024-02-27T08:33:33+00:00 Antarctic permafrost degassing in Taylor Valley by extensive soil gas investigation Ruggiero, L Sciarra, A Mazzini, A Florindo, F Wilson, G Tartarello, M C Mazzoli, C Anderson, J T H Romano, V Worthington, R Bigi, S Sassi, R Ciotoli, G Ruggiero, L Sciarra, A Mazzini, A Florindo, F Wilson, G Tartarello, M C Mazzoli, C Anderson, J T H Romano, V Worthington, R Bigi, S Sassi, R Ciotoli, G 2023 https://hdl.handle.net/11573/1677990 https://doi.org/10.1016/j.scitotenv.2022.161345 eng eng Elsevier place:Amsterdam info:eu-repo/semantics/altIdentifier/pmid/36603636 info:eu-repo/semantics/altIdentifier/wos/WOS:000921184700001 volume:866 numberofpages:11 journal:SCIENCE OF THE TOTAL ENVIRONMENT https://hdl.handle.net/11573/1677990 doi:10.1016/j.scitotenv.2022.161345 info:eu-repo/semantics/altIdentifier/scopus/2-s2.0-85145660744 info:eu-repo/semantics/closedAccess Antarctica CO(2) output McMurdo Dry Valley Permafrost Soil gas survey info:eu-repo/semantics/article 2023 ftunivromairis https://doi.org/10.1016/j.scitotenv.2022.161345 2024-01-31T17:43:42Z Ongoing studies conducted in northern polar regions reveal that permafrost stability plays a key role in the modern carbon cycle as it potentially stores considerable quantities of greenhouse gases. Rapid and recent warming of the Arctic permafrost is resulting in significant greenhouse gas emissions, both from physical and microbial processes. The potential impact of greenhouse gas release from the Antarctic region has not, to date, been investigated. In Antarctica, the McMurdo Dry Valleys comprise 10 % of the ice-free soil surface areas in Antarctica and like the northern polar regions are also warming albeit at a slower rate. The work presented herein examines a comprehensive sample suite of soil gas (e.g., CO2, CH4 and He) concentrations and CO2 flux measurements conducted in Taylor Valley during austral summer 2019/2020. Analytical results reveal the presence of significant concentrations of CO2, CH4 and He (up to 3.44 vol%, 18,447 ppmv and 6.49 ppmv, respectively) at the base of the active layer. When compared with the few previously obtained measurements, we observe increased CO2 flux rates (estimated CO2 emissions in the study area of 21.6 km2 ≈ 15 tons day-1). We suggest that the gas source is connected with the deep brines migrating from inland (potentially from beneath the Antarctic Ice Sheet) towards the coast beneath the permafrost layer. These data provide a baseline for future investigations aimed at monitoring the changing rate of greenhouse gas emissions from Antarctic permafrost, and the potential origin of gases, as the southern polar region warms. Article in Journal/Newspaper Antarc* Antarctic Antarctica Arctic Ice Ice Sheet McMurdo Dry Valleys permafrost Sapienza Università di Roma: CINECA IRIS Antarctic Arctic Austral McMurdo Dry Valleys Taylor Valley ENVELOPE(163.000,163.000,-77.617,-77.617) The Antarctic Science of The Total Environment 866 161345 |
institution |
Open Polar |
collection |
Sapienza Università di Roma: CINECA IRIS |
op_collection_id |
ftunivromairis |
language |
English |
topic |
Antarctica CO(2) output McMurdo Dry Valley Permafrost Soil gas survey |
spellingShingle |
Antarctica CO(2) output McMurdo Dry Valley Permafrost Soil gas survey Ruggiero, L Sciarra, A Mazzini, A Florindo, F Wilson, G Tartarello, M C Mazzoli, C Anderson, J T H Romano, V Worthington, R Bigi, S Sassi, R Ciotoli, G Antarctic permafrost degassing in Taylor Valley by extensive soil gas investigation |
topic_facet |
Antarctica CO(2) output McMurdo Dry Valley Permafrost Soil gas survey |
description |
Ongoing studies conducted in northern polar regions reveal that permafrost stability plays a key role in the modern carbon cycle as it potentially stores considerable quantities of greenhouse gases. Rapid and recent warming of the Arctic permafrost is resulting in significant greenhouse gas emissions, both from physical and microbial processes. The potential impact of greenhouse gas release from the Antarctic region has not, to date, been investigated. In Antarctica, the McMurdo Dry Valleys comprise 10 % of the ice-free soil surface areas in Antarctica and like the northern polar regions are also warming albeit at a slower rate. The work presented herein examines a comprehensive sample suite of soil gas (e.g., CO2, CH4 and He) concentrations and CO2 flux measurements conducted in Taylor Valley during austral summer 2019/2020. Analytical results reveal the presence of significant concentrations of CO2, CH4 and He (up to 3.44 vol%, 18,447 ppmv and 6.49 ppmv, respectively) at the base of the active layer. When compared with the few previously obtained measurements, we observe increased CO2 flux rates (estimated CO2 emissions in the study area of 21.6 km2 ≈ 15 tons day-1). We suggest that the gas source is connected with the deep brines migrating from inland (potentially from beneath the Antarctic Ice Sheet) towards the coast beneath the permafrost layer. These data provide a baseline for future investigations aimed at monitoring the changing rate of greenhouse gas emissions from Antarctic permafrost, and the potential origin of gases, as the southern polar region warms. |
author2 |
Ruggiero, L Sciarra, A Mazzini, A Florindo, F Wilson, G Tartarello, M C Mazzoli, C Anderson, J T H Romano, V Worthington, R Bigi, S Sassi, R Ciotoli, G |
format |
Article in Journal/Newspaper |
author |
Ruggiero, L Sciarra, A Mazzini, A Florindo, F Wilson, G Tartarello, M C Mazzoli, C Anderson, J T H Romano, V Worthington, R Bigi, S Sassi, R Ciotoli, G |
author_facet |
Ruggiero, L Sciarra, A Mazzini, A Florindo, F Wilson, G Tartarello, M C Mazzoli, C Anderson, J T H Romano, V Worthington, R Bigi, S Sassi, R Ciotoli, G |
author_sort |
Ruggiero, L |
title |
Antarctic permafrost degassing in Taylor Valley by extensive soil gas investigation |
title_short |
Antarctic permafrost degassing in Taylor Valley by extensive soil gas investigation |
title_full |
Antarctic permafrost degassing in Taylor Valley by extensive soil gas investigation |
title_fullStr |
Antarctic permafrost degassing in Taylor Valley by extensive soil gas investigation |
title_full_unstemmed |
Antarctic permafrost degassing in Taylor Valley by extensive soil gas investigation |
title_sort |
antarctic permafrost degassing in taylor valley by extensive soil gas investigation |
publisher |
Elsevier |
publishDate |
2023 |
url |
https://hdl.handle.net/11573/1677990 https://doi.org/10.1016/j.scitotenv.2022.161345 |
long_lat |
ENVELOPE(163.000,163.000,-77.617,-77.617) |
geographic |
Antarctic Arctic Austral McMurdo Dry Valleys Taylor Valley The Antarctic |
geographic_facet |
Antarctic Arctic Austral McMurdo Dry Valleys Taylor Valley The Antarctic |
genre |
Antarc* Antarctic Antarctica Arctic Ice Ice Sheet McMurdo Dry Valleys permafrost |
genre_facet |
Antarc* Antarctic Antarctica Arctic Ice Ice Sheet McMurdo Dry Valleys permafrost |
op_relation |
info:eu-repo/semantics/altIdentifier/pmid/36603636 info:eu-repo/semantics/altIdentifier/wos/WOS:000921184700001 volume:866 numberofpages:11 journal:SCIENCE OF THE TOTAL ENVIRONMENT https://hdl.handle.net/11573/1677990 doi:10.1016/j.scitotenv.2022.161345 info:eu-repo/semantics/altIdentifier/scopus/2-s2.0-85145660744 |
op_rights |
info:eu-repo/semantics/closedAccess |
op_doi |
https://doi.org/10.1016/j.scitotenv.2022.161345 |
container_title |
Science of The Total Environment |
container_volume |
866 |
container_start_page |
161345 |
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1792046311281786880 |