Spatial Distribution of Bioavailable Inorganic Nitrogen From Thawing Permafrost
Arctic permafrost contains large amounts of nitrogen (N), which may be bioavailable upon permafrost thaw. Here, we have compiled inorganic N data from published studies on the active layer and permafrost layers combined with new data to quantify the spatial variability of bioavailable inorganic N in...
Published in: | Global Biogeochemical Cycles |
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Language: | English |
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2023
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Online Access: | https://curis.ku.dk/portal/da/publications/spatial-distribution-of-bioavailable-inorganic-nitrogen-from-thawing-permafrost(58ecaf9d-fa94-494d-907b-b5582fed285f).html https://doi.org/10.1029/2022GB007589 https://curis.ku.dk/ws/files/340881172/Spatial_Distribution_of_Bioavailable_Inorganic_Nitrogen_From_Thawing_Permafrost.pdf |
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ftcopenhagenunip:oai:pure.atira.dk:publications/58ecaf9d-fa94-494d-907b-b5582fed285f 2024-06-09T07:43:59+00:00 Spatial Distribution of Bioavailable Inorganic Nitrogen From Thawing Permafrost Hansen, Hans Frederik Engvej Elberling, Bo 2023 application/pdf https://curis.ku.dk/portal/da/publications/spatial-distribution-of-bioavailable-inorganic-nitrogen-from-thawing-permafrost(58ecaf9d-fa94-494d-907b-b5582fed285f).html https://doi.org/10.1029/2022GB007589 https://curis.ku.dk/ws/files/340881172/Spatial_Distribution_of_Bioavailable_Inorganic_Nitrogen_From_Thawing_Permafrost.pdf eng eng info:eu-repo/semantics/openAccess Hansen , H F E & Elberling , B 2023 , ' Spatial Distribution of Bioavailable Inorganic Nitrogen From Thawing Permafrost ' , Global Biogeochemical Cycles , vol. 37 , no. 2 , e2022GB007589 . https://doi.org/10.1029/2022GB007589 ammonium Arctic bioavailable nitrogen permafrost article 2023 ftcopenhagenunip https://doi.org/10.1029/2022GB007589 2024-05-16T11:29:28Z Arctic permafrost contains large amounts of nitrogen (N), which may be bioavailable upon permafrost thaw. Here, we have compiled inorganic N data from published studies on the active layer and permafrost layers combined with new data to quantify the spatial variability of bioavailable inorganic N in permafrost-affected ecosystems across the Northern Hemisphere. Ammonium (NH 4 + ) and nitrate (NO 3 − ) are typically extracted from samples using different agents and strength. The results of an extraction experiment are here used to recalculate published concentrations on NH 4 + and NO 3 − to a “water extractable fraction.” The results show that upper permafrost across all sites and samples contains significantly more NH 4 + compared to the root zone and was significantly and positively correlated with an increasing water/ice content despite a surprisingly high variation within and between sites. Based on the average reported permafrost thaw rates (0.4–0.8 cm y −1 ) for wet and dry landscape types, the average release of inorganic N (NH 4 + and NO 3 − ) from wet tundra ecosystems was calculated to be 2.0 [1.13–2.61] kg N ha −1 decade −1 and 1.3 [0.78–1.81] kg N ha −1 decade −1 for dry ecosystems. This brings permafrost-derived inorganic N on the same order of magnitude as biological nitrogen fixation in relatively dry tundra ecosystems but only marginally compared to nitrogen fixation in wet ecosystems. These landscape-specific variations highlight the need for improving the understanding of N mobilization linked to permafrost thawing, but also that N transfer from well-drained slopes to lower parts of the landscape can be important for the potential plant growth (greening) downslope from surrounding landscape types with faster permafrost thawing. Article in Journal/Newspaper Arctic Ice permafrost Tundra University of Copenhagen: Research Arctic Global Biogeochemical Cycles 37 2 |
institution |
Open Polar |
collection |
University of Copenhagen: Research |
op_collection_id |
ftcopenhagenunip |
language |
English |
topic |
ammonium Arctic bioavailable nitrogen permafrost |
spellingShingle |
ammonium Arctic bioavailable nitrogen permafrost Hansen, Hans Frederik Engvej Elberling, Bo Spatial Distribution of Bioavailable Inorganic Nitrogen From Thawing Permafrost |
topic_facet |
ammonium Arctic bioavailable nitrogen permafrost |
description |
Arctic permafrost contains large amounts of nitrogen (N), which may be bioavailable upon permafrost thaw. Here, we have compiled inorganic N data from published studies on the active layer and permafrost layers combined with new data to quantify the spatial variability of bioavailable inorganic N in permafrost-affected ecosystems across the Northern Hemisphere. Ammonium (NH 4 + ) and nitrate (NO 3 − ) are typically extracted from samples using different agents and strength. The results of an extraction experiment are here used to recalculate published concentrations on NH 4 + and NO 3 − to a “water extractable fraction.” The results show that upper permafrost across all sites and samples contains significantly more NH 4 + compared to the root zone and was significantly and positively correlated with an increasing water/ice content despite a surprisingly high variation within and between sites. Based on the average reported permafrost thaw rates (0.4–0.8 cm y −1 ) for wet and dry landscape types, the average release of inorganic N (NH 4 + and NO 3 − ) from wet tundra ecosystems was calculated to be 2.0 [1.13–2.61] kg N ha −1 decade −1 and 1.3 [0.78–1.81] kg N ha −1 decade −1 for dry ecosystems. This brings permafrost-derived inorganic N on the same order of magnitude as biological nitrogen fixation in relatively dry tundra ecosystems but only marginally compared to nitrogen fixation in wet ecosystems. These landscape-specific variations highlight the need for improving the understanding of N mobilization linked to permafrost thawing, but also that N transfer from well-drained slopes to lower parts of the landscape can be important for the potential plant growth (greening) downslope from surrounding landscape types with faster permafrost thawing. |
format |
Article in Journal/Newspaper |
author |
Hansen, Hans Frederik Engvej Elberling, Bo |
author_facet |
Hansen, Hans Frederik Engvej Elberling, Bo |
author_sort |
Hansen, Hans Frederik Engvej |
title |
Spatial Distribution of Bioavailable Inorganic Nitrogen From Thawing Permafrost |
title_short |
Spatial Distribution of Bioavailable Inorganic Nitrogen From Thawing Permafrost |
title_full |
Spatial Distribution of Bioavailable Inorganic Nitrogen From Thawing Permafrost |
title_fullStr |
Spatial Distribution of Bioavailable Inorganic Nitrogen From Thawing Permafrost |
title_full_unstemmed |
Spatial Distribution of Bioavailable Inorganic Nitrogen From Thawing Permafrost |
title_sort |
spatial distribution of bioavailable inorganic nitrogen from thawing permafrost |
publishDate |
2023 |
url |
https://curis.ku.dk/portal/da/publications/spatial-distribution-of-bioavailable-inorganic-nitrogen-from-thawing-permafrost(58ecaf9d-fa94-494d-907b-b5582fed285f).html https://doi.org/10.1029/2022GB007589 https://curis.ku.dk/ws/files/340881172/Spatial_Distribution_of_Bioavailable_Inorganic_Nitrogen_From_Thawing_Permafrost.pdf |
geographic |
Arctic |
geographic_facet |
Arctic |
genre |
Arctic Ice permafrost Tundra |
genre_facet |
Arctic Ice permafrost Tundra |
op_source |
Hansen , H F E & Elberling , B 2023 , ' Spatial Distribution of Bioavailable Inorganic Nitrogen From Thawing Permafrost ' , Global Biogeochemical Cycles , vol. 37 , no. 2 , e2022GB007589 . https://doi.org/10.1029/2022GB007589 |
op_rights |
info:eu-repo/semantics/openAccess |
op_doi |
https://doi.org/10.1029/2022GB007589 |
container_title |
Global Biogeochemical Cycles |
container_volume |
37 |
container_issue |
2 |
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1801372795545845760 |