Increased Arctic NO3− Availability as a Hydrogeomorphic Consequence of Permafrost Degradation and Landscape Drying
Climate-driven permafrost thaw alters the strongly coupled carbon and nitrogen cycles within the Arctic tundra, influencing the availability of limiting nutrients including nitrate (NO 3 − ). Researchers have identified two primary mechanisms that increase nitrogen and NO 3 − availability within per...
Published in: | Nitrogen |
---|---|
Main Authors: | , , , , , , , , , , |
Other Authors: | |
Format: | Article in Journal/Newspaper |
Language: | unknown |
Published: |
Multidisciplinary Digital Publishing Institute
2022
|
Subjects: | |
Online Access: | https://hdl.handle.net/1721.1/142798.2 |
id |
ftmit:oai:dspace.mit.edu:1721.1/142798.2 |
---|---|
record_format |
openpolar |
spelling |
ftmit:oai:dspace.mit.edu:1721.1/142798.2 2024-04-21T08:10:04+00:00 Increased Arctic NO3− Availability as a Hydrogeomorphic Consequence of Permafrost Degradation and Landscape Drying Arendt, Carli A. Heikoop, Jeffrey M. Newman, Brent D. Wilson, Cathy J. Wainwright, Haruko Kumar, Jitendra Andersen, Christian G. Wales, Nathan A. Dafflon, Baptiste Cherry, Jessica Wullschleger, Stan D. Massachusetts Institute of Technology. Department of Nuclear Science and Engineering 2022-05-27T13:36:29Z application/octet-stream https://hdl.handle.net/1721.1/142798.2 unknown Multidisciplinary Digital Publishing Institute http://dx.doi.org/10.3390/nitrogen3020021 Nitrogen 2504-3129 https://hdl.handle.net/1721.1/142798.2 Nitrogen 3 (2): 314-332 (2022) Creative Commons Attribution https://creativecommons.org/licenses/by/4.0 Multidisciplinary Digital Publishing Institute Article http://purl.org/eprint/type/JournalArticle 2022 ftmit https://doi.org/10.3390/nitrogen3020021 2024-03-27T15:02:15Z Climate-driven permafrost thaw alters the strongly coupled carbon and nitrogen cycles within the Arctic tundra, influencing the availability of limiting nutrients including nitrate (NO 3 − ). Researchers have identified two primary mechanisms that increase nitrogen and NO 3 − availability within permafrost soils: (1) the ‘frozen feast’, where previously frozen organic material becomes available as it thaws, and (2) ‘shrubification’, where expansion of nitrogen-fixing shrubs promotes increased soil nitrogen. Through the synthesis of original and previously published observational data, and the application of multiple geospatial approaches, this study investigates and highlights a third mechanism that increases NO 3 − availability: the hydrogeomorphic evolution of polygonal permafrost landscapes. Permafrost thaw drives changes in microtopography, increasing the drainage of topographic highs, thus increasing oxic conditions that promote NO 3 − production and accumulation. We extrapolate relationships between NO 3 − and soil moisture in elevated topographic features within our study area and the broader Alaskan Coastal Plain and investigate potential changes in NO 3 − availability in response to possible hydrogeomorphic evolution scenarios of permafrost landscapes. These approximations indicate that such changes could increase Arctic tundra NO 3 − availability by ~250–1000%. Thus, hydrogeomorphic changes that accompany continued permafrost degradation in polygonal permafrost landscapes will substantially increase soil pore water NO 3 − availability and boost future fertilization and productivity in the Arctic. Article in Journal/Newspaper permafrost Tundra DSpace@MIT (Massachusetts Institute of Technology) Nitrogen 3 2 314 332 |
institution |
Open Polar |
collection |
DSpace@MIT (Massachusetts Institute of Technology) |
op_collection_id |
ftmit |
language |
unknown |
description |
Climate-driven permafrost thaw alters the strongly coupled carbon and nitrogen cycles within the Arctic tundra, influencing the availability of limiting nutrients including nitrate (NO 3 − ). Researchers have identified two primary mechanisms that increase nitrogen and NO 3 − availability within permafrost soils: (1) the ‘frozen feast’, where previously frozen organic material becomes available as it thaws, and (2) ‘shrubification’, where expansion of nitrogen-fixing shrubs promotes increased soil nitrogen. Through the synthesis of original and previously published observational data, and the application of multiple geospatial approaches, this study investigates and highlights a third mechanism that increases NO 3 − availability: the hydrogeomorphic evolution of polygonal permafrost landscapes. Permafrost thaw drives changes in microtopography, increasing the drainage of topographic highs, thus increasing oxic conditions that promote NO 3 − production and accumulation. We extrapolate relationships between NO 3 − and soil moisture in elevated topographic features within our study area and the broader Alaskan Coastal Plain and investigate potential changes in NO 3 − availability in response to possible hydrogeomorphic evolution scenarios of permafrost landscapes. These approximations indicate that such changes could increase Arctic tundra NO 3 − availability by ~250–1000%. Thus, hydrogeomorphic changes that accompany continued permafrost degradation in polygonal permafrost landscapes will substantially increase soil pore water NO 3 − availability and boost future fertilization and productivity in the Arctic. |
author2 |
Massachusetts Institute of Technology. Department of Nuclear Science and Engineering |
format |
Article in Journal/Newspaper |
author |
Arendt, Carli A. Heikoop, Jeffrey M. Newman, Brent D. Wilson, Cathy J. Wainwright, Haruko Kumar, Jitendra Andersen, Christian G. Wales, Nathan A. Dafflon, Baptiste Cherry, Jessica Wullschleger, Stan D. |
spellingShingle |
Arendt, Carli A. Heikoop, Jeffrey M. Newman, Brent D. Wilson, Cathy J. Wainwright, Haruko Kumar, Jitendra Andersen, Christian G. Wales, Nathan A. Dafflon, Baptiste Cherry, Jessica Wullschleger, Stan D. Increased Arctic NO3− Availability as a Hydrogeomorphic Consequence of Permafrost Degradation and Landscape Drying |
author_facet |
Arendt, Carli A. Heikoop, Jeffrey M. Newman, Brent D. Wilson, Cathy J. Wainwright, Haruko Kumar, Jitendra Andersen, Christian G. Wales, Nathan A. Dafflon, Baptiste Cherry, Jessica Wullschleger, Stan D. |
author_sort |
Arendt, Carli A. |
title |
Increased Arctic NO3− Availability as a Hydrogeomorphic Consequence of Permafrost Degradation and Landscape Drying |
title_short |
Increased Arctic NO3− Availability as a Hydrogeomorphic Consequence of Permafrost Degradation and Landscape Drying |
title_full |
Increased Arctic NO3− Availability as a Hydrogeomorphic Consequence of Permafrost Degradation and Landscape Drying |
title_fullStr |
Increased Arctic NO3− Availability as a Hydrogeomorphic Consequence of Permafrost Degradation and Landscape Drying |
title_full_unstemmed |
Increased Arctic NO3− Availability as a Hydrogeomorphic Consequence of Permafrost Degradation and Landscape Drying |
title_sort |
increased arctic no3− availability as a hydrogeomorphic consequence of permafrost degradation and landscape drying |
publisher |
Multidisciplinary Digital Publishing Institute |
publishDate |
2022 |
url |
https://hdl.handle.net/1721.1/142798.2 |
genre |
permafrost Tundra |
genre_facet |
permafrost Tundra |
op_source |
Multidisciplinary Digital Publishing Institute |
op_relation |
http://dx.doi.org/10.3390/nitrogen3020021 Nitrogen 2504-3129 https://hdl.handle.net/1721.1/142798.2 Nitrogen 3 (2): 314-332 (2022) |
op_rights |
Creative Commons Attribution https://creativecommons.org/licenses/by/4.0 |
op_doi |
https://doi.org/10.3390/nitrogen3020021 |
container_title |
Nitrogen |
container_volume |
3 |
container_issue |
2 |
container_start_page |
314 |
op_container_end_page |
332 |
_version_ |
1796951366506119168 |