The Distribution of Soil Carbon and Nitrogen Stocks Among Dominant Geomorphological Terrain Units in Qarlikturvik Valley, Bylot Island, Arctic Canada
International audience Soils of circumpolar regions store large amounts of carbon (C) and are a crucial part of the global C cycle. Yet, little is known about the distribution of soil C stocks among geomorphological terrain units of glacial valleys in the Arctic. Soil C and nitrogen (N) content for...
Published in: | Journal of Geophysical Research: Biogeosciences |
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2022
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Online Access: | https://hal.science/hal-03870705 https://hal.science/hal-03870705/document https://hal.science/hal-03870705/file/143-OlaJGR-Biog2022.pdf https://doi.org/10.1029/2021JG006750 |
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ftinsu:oai:HAL:hal-03870705v1 2023-06-18T03:39:09+02:00 The Distribution of Soil Carbon and Nitrogen Stocks Among Dominant Geomorphological Terrain Units in Qarlikturvik Valley, Bylot Island, Arctic Canada Ola, A. Fortier, D. Coulombe, S. Comte, J. Domine, Florent Takuvik International Research Laboratory Université Laval Québec (ULaval)-Centre National de la Recherche Scientifique (CNRS) Université de Montréal (UdeM) Université Laval Québec (ULaval) Centre Eau Terre Environnement Québec (INRS - ETE) Institut National de la Recherche Scientifique Québec (INRS) Takuvik Joint International Laboratory ULAVAL-CNRS Université Laval Québec (ULaval)-Institut national des sciences de l'Univers (INSU - CNRS)-Centre National de la Recherche Scientifique (CNRS) 2022 https://hal.science/hal-03870705 https://hal.science/hal-03870705/document https://hal.science/hal-03870705/file/143-OlaJGR-Biog2022.pdf https://doi.org/10.1029/2021JG006750 en eng HAL CCSD American Geophysical Union info:eu-repo/semantics/altIdentifier/doi/10.1029/2021JG006750 hal-03870705 https://hal.science/hal-03870705 https://hal.science/hal-03870705/document https://hal.science/hal-03870705/file/143-OlaJGR-Biog2022.pdf doi:10.1029/2021JG006750 info:eu-repo/semantics/OpenAccess ISSN: 2169-8953 Journal of Geophysical Research: Biogeosciences https://hal.science/hal-03870705 Journal of Geophysical Research: Biogeosciences, 2022, 127 (7), pp.e2021JG006750. ⟨10.1029/2021JG006750⟩ carbon [SDU.STU.GC]Sciences of the Universe [physics]/Earth Sciences/Geochemistry [SDE]Environmental Sciences info:eu-repo/semantics/article Journal articles 2022 ftinsu https://doi.org/10.1029/2021JG006750 2023-06-05T19:50:21Z International audience Soils of circumpolar regions store large amounts of carbon (C) and are a crucial part of the global C cycle. Yet, little is known about the distribution of soil C stocks among geomorphological terrain units of glacial valleys in the Arctic. Soil C and nitrogen (N) content for the top 100 cm of the dominant vegetated geomorphological terrain units (i.e., alluvial fans, humid polygons, mesic polygons) at Qarlikturvik Valley, Bylot Island, Canada have been analyzed. Soil C content was greatest in humid low-center ice-wedge polygons (82 kg m−2), followed by mesic flat-center ice-wedge polygons (40 kg m−2), and alluvial fan area (16 kg m−2), due to prevailing geomorphological processes, differences in vegetation and soil characteristics, as well as permafrost processes. Soil N content was greatest in humid polygons (4 kg m−2), followed by mesic polygons (2 kg m−2), and alluvial fan area (1 kg m−2). Vertically, C and N decreased with increasing depth except for a peak in C at depth in humid polygons, a likely result of past changes in vegetation cover. At Qarlikturvik Valley, which has a size of 121.7 km2, alluvial fans store 0.226 Tg organic C and humid and mesic polygons store 1.643 and 0.218 Tg organic C, respectively in the top 100 cm of soil. Findings like these are important to further constrain pan-Arctic soil C and N stock estimates and thus climate models. Article in Journal/Newspaper Arctic Bylot Island Ice permafrost wedge* Institut national des sciences de l'Univers: HAL-INSU Arctic Bylot Island Canada Journal of Geophysical Research: Biogeosciences 127 7 |
institution |
Open Polar |
collection |
Institut national des sciences de l'Univers: HAL-INSU |
op_collection_id |
ftinsu |
language |
English |
topic |
carbon [SDU.STU.GC]Sciences of the Universe [physics]/Earth Sciences/Geochemistry [SDE]Environmental Sciences |
spellingShingle |
carbon [SDU.STU.GC]Sciences of the Universe [physics]/Earth Sciences/Geochemistry [SDE]Environmental Sciences Ola, A. Fortier, D. Coulombe, S. Comte, J. Domine, Florent The Distribution of Soil Carbon and Nitrogen Stocks Among Dominant Geomorphological Terrain Units in Qarlikturvik Valley, Bylot Island, Arctic Canada |
topic_facet |
carbon [SDU.STU.GC]Sciences of the Universe [physics]/Earth Sciences/Geochemistry [SDE]Environmental Sciences |
description |
International audience Soils of circumpolar regions store large amounts of carbon (C) and are a crucial part of the global C cycle. Yet, little is known about the distribution of soil C stocks among geomorphological terrain units of glacial valleys in the Arctic. Soil C and nitrogen (N) content for the top 100 cm of the dominant vegetated geomorphological terrain units (i.e., alluvial fans, humid polygons, mesic polygons) at Qarlikturvik Valley, Bylot Island, Canada have been analyzed. Soil C content was greatest in humid low-center ice-wedge polygons (82 kg m−2), followed by mesic flat-center ice-wedge polygons (40 kg m−2), and alluvial fan area (16 kg m−2), due to prevailing geomorphological processes, differences in vegetation and soil characteristics, as well as permafrost processes. Soil N content was greatest in humid polygons (4 kg m−2), followed by mesic polygons (2 kg m−2), and alluvial fan area (1 kg m−2). Vertically, C and N decreased with increasing depth except for a peak in C at depth in humid polygons, a likely result of past changes in vegetation cover. At Qarlikturvik Valley, which has a size of 121.7 km2, alluvial fans store 0.226 Tg organic C and humid and mesic polygons store 1.643 and 0.218 Tg organic C, respectively in the top 100 cm of soil. Findings like these are important to further constrain pan-Arctic soil C and N stock estimates and thus climate models. |
author2 |
Takuvik International Research Laboratory Université Laval Québec (ULaval)-Centre National de la Recherche Scientifique (CNRS) Université de Montréal (UdeM) Université Laval Québec (ULaval) Centre Eau Terre Environnement Québec (INRS - ETE) Institut National de la Recherche Scientifique Québec (INRS) Takuvik Joint International Laboratory ULAVAL-CNRS Université Laval Québec (ULaval)-Institut national des sciences de l'Univers (INSU - CNRS)-Centre National de la Recherche Scientifique (CNRS) |
format |
Article in Journal/Newspaper |
author |
Ola, A. Fortier, D. Coulombe, S. Comte, J. Domine, Florent |
author_facet |
Ola, A. Fortier, D. Coulombe, S. Comte, J. Domine, Florent |
author_sort |
Ola, A. |
title |
The Distribution of Soil Carbon and Nitrogen Stocks Among Dominant Geomorphological Terrain Units in Qarlikturvik Valley, Bylot Island, Arctic Canada |
title_short |
The Distribution of Soil Carbon and Nitrogen Stocks Among Dominant Geomorphological Terrain Units in Qarlikturvik Valley, Bylot Island, Arctic Canada |
title_full |
The Distribution of Soil Carbon and Nitrogen Stocks Among Dominant Geomorphological Terrain Units in Qarlikturvik Valley, Bylot Island, Arctic Canada |
title_fullStr |
The Distribution of Soil Carbon and Nitrogen Stocks Among Dominant Geomorphological Terrain Units in Qarlikturvik Valley, Bylot Island, Arctic Canada |
title_full_unstemmed |
The Distribution of Soil Carbon and Nitrogen Stocks Among Dominant Geomorphological Terrain Units in Qarlikturvik Valley, Bylot Island, Arctic Canada |
title_sort |
distribution of soil carbon and nitrogen stocks among dominant geomorphological terrain units in qarlikturvik valley, bylot island, arctic canada |
publisher |
HAL CCSD |
publishDate |
2022 |
url |
https://hal.science/hal-03870705 https://hal.science/hal-03870705/document https://hal.science/hal-03870705/file/143-OlaJGR-Biog2022.pdf https://doi.org/10.1029/2021JG006750 |
geographic |
Arctic Bylot Island Canada |
geographic_facet |
Arctic Bylot Island Canada |
genre |
Arctic Bylot Island Ice permafrost wedge* |
genre_facet |
Arctic Bylot Island Ice permafrost wedge* |
op_source |
ISSN: 2169-8953 Journal of Geophysical Research: Biogeosciences https://hal.science/hal-03870705 Journal of Geophysical Research: Biogeosciences, 2022, 127 (7), pp.e2021JG006750. ⟨10.1029/2021JG006750⟩ |
op_relation |
info:eu-repo/semantics/altIdentifier/doi/10.1029/2021JG006750 hal-03870705 https://hal.science/hal-03870705 https://hal.science/hal-03870705/document https://hal.science/hal-03870705/file/143-OlaJGR-Biog2022.pdf doi:10.1029/2021JG006750 |
op_rights |
info:eu-repo/semantics/OpenAccess |
op_doi |
https://doi.org/10.1029/2021JG006750 |
container_title |
Journal of Geophysical Research: Biogeosciences |
container_volume |
127 |
container_issue |
7 |
_version_ |
1769003960742445056 |