Depth-Resolved Physicochemical Characteristics of Active Layer and Permafrost Soils in an Arctic Polygonal Tundra Region
Permafrost physicochemical parameters play a key role in controlling the response of permafrost carbon to climate change. We studied the physicochemical parameters of permafrost in an Arctic tundra region to evaluate (1) how soil parameters vary with depth and whether and how they are interrelated,...
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Online Access: | http://www.osti.gov/servlets/purl/1477276 https://www.osti.gov/biblio/1477276 https://doi.org/10.1002/2018JG004413 |
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ftosti:oai:osti.gov:1477276 2023-07-30T04:01:34+02:00 Depth-Resolved Physicochemical Characteristics of Active Layer and Permafrost Soils in an Arctic Polygonal Tundra Region Wu, Yuxin Ulrich, Craig Kneafsey, Timothy Lopez, Robin Chou, Chunwei Geller, Jil McKnight, Katie Dafflon, Baptiste Soom, Florian Peterson, John Hubbard, Susan 2022-05-24 application/pdf http://www.osti.gov/servlets/purl/1477276 https://www.osti.gov/biblio/1477276 https://doi.org/10.1002/2018JG004413 unknown http://www.osti.gov/servlets/purl/1477276 https://www.osti.gov/biblio/1477276 https://doi.org/10.1002/2018JG004413 doi:10.1002/2018JG004413 58 GEOSCIENCES 2022 ftosti https://doi.org/10.1002/2018JG004413 2023-07-11T09:29:29Z Permafrost physicochemical parameters play a key role in controlling the response of permafrost carbon to climate change. We studied the physicochemical parameters of permafrost in an Arctic tundra region to evaluate (1) how soil parameters vary with depth and whether and how they are interrelated, (2) whether and how permafrost soil differs from its overlaying active layer, and (3) whether soil property-depth relationships are different across geomorphic features (e.g., low, flat, and high centered polygons). We also explored the possible biogeochemical processes that led to these soil characteristics and how they may affect biogeochemical reactions upon permafrost thaw. We observed (1) consistent relationships between soil property and depth and between major parameters, (2) large contrasts of key soil parameters between active layer and permafrost, indicative of potentially different response of the permafrost carbon to warming when compared to the active layer, and (3) a correlation between soil hydraulic conductivity and topographic features that impacts soil hydrologic processes. Our analysis suggests that the permafrost has a marine-derived chemical signature that differs from the active layer and shapes the physicochemical fingerprints of the different geomorphic features. Specifically, we revealed the unique signatures of the high center polygons, indicative of possible microbial activity at depth (>1 m). Our study suggested consistent key soil parameter-depth correlations while demonstrating complex lateral and vertical variabilities. These results are valuable for identifying approaches to upscale point-based measurements and for improving model parameterization to predict permafrost carbon behavior and feedback under future climate. Other/Unknown Material Arctic Climate change permafrost Tundra SciTec Connect (Office of Scientific and Technical Information - OSTI, U.S. Department of Energy) Arctic Journal of Geophysical Research: Biogeosciences 123 4 1366 1386 |
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SciTec Connect (Office of Scientific and Technical Information - OSTI, U.S. Department of Energy) |
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58 GEOSCIENCES Wu, Yuxin Ulrich, Craig Kneafsey, Timothy Lopez, Robin Chou, Chunwei Geller, Jil McKnight, Katie Dafflon, Baptiste Soom, Florian Peterson, John Hubbard, Susan Depth-Resolved Physicochemical Characteristics of Active Layer and Permafrost Soils in an Arctic Polygonal Tundra Region |
topic_facet |
58 GEOSCIENCES |
description |
Permafrost physicochemical parameters play a key role in controlling the response of permafrost carbon to climate change. We studied the physicochemical parameters of permafrost in an Arctic tundra region to evaluate (1) how soil parameters vary with depth and whether and how they are interrelated, (2) whether and how permafrost soil differs from its overlaying active layer, and (3) whether soil property-depth relationships are different across geomorphic features (e.g., low, flat, and high centered polygons). We also explored the possible biogeochemical processes that led to these soil characteristics and how they may affect biogeochemical reactions upon permafrost thaw. We observed (1) consistent relationships between soil property and depth and between major parameters, (2) large contrasts of key soil parameters between active layer and permafrost, indicative of potentially different response of the permafrost carbon to warming when compared to the active layer, and (3) a correlation between soil hydraulic conductivity and topographic features that impacts soil hydrologic processes. Our analysis suggests that the permafrost has a marine-derived chemical signature that differs from the active layer and shapes the physicochemical fingerprints of the different geomorphic features. Specifically, we revealed the unique signatures of the high center polygons, indicative of possible microbial activity at depth (>1 m). Our study suggested consistent key soil parameter-depth correlations while demonstrating complex lateral and vertical variabilities. These results are valuable for identifying approaches to upscale point-based measurements and for improving model parameterization to predict permafrost carbon behavior and feedback under future climate. |
author |
Wu, Yuxin Ulrich, Craig Kneafsey, Timothy Lopez, Robin Chou, Chunwei Geller, Jil McKnight, Katie Dafflon, Baptiste Soom, Florian Peterson, John Hubbard, Susan |
author_facet |
Wu, Yuxin Ulrich, Craig Kneafsey, Timothy Lopez, Robin Chou, Chunwei Geller, Jil McKnight, Katie Dafflon, Baptiste Soom, Florian Peterson, John Hubbard, Susan |
author_sort |
Wu, Yuxin |
title |
Depth-Resolved Physicochemical Characteristics of Active Layer and Permafrost Soils in an Arctic Polygonal Tundra Region |
title_short |
Depth-Resolved Physicochemical Characteristics of Active Layer and Permafrost Soils in an Arctic Polygonal Tundra Region |
title_full |
Depth-Resolved Physicochemical Characteristics of Active Layer and Permafrost Soils in an Arctic Polygonal Tundra Region |
title_fullStr |
Depth-Resolved Physicochemical Characteristics of Active Layer and Permafrost Soils in an Arctic Polygonal Tundra Region |
title_full_unstemmed |
Depth-Resolved Physicochemical Characteristics of Active Layer and Permafrost Soils in an Arctic Polygonal Tundra Region |
title_sort |
depth-resolved physicochemical characteristics of active layer and permafrost soils in an arctic polygonal tundra region |
publishDate |
2022 |
url |
http://www.osti.gov/servlets/purl/1477276 https://www.osti.gov/biblio/1477276 https://doi.org/10.1002/2018JG004413 |
geographic |
Arctic |
geographic_facet |
Arctic |
genre |
Arctic Climate change permafrost Tundra |
genre_facet |
Arctic Climate change permafrost Tundra |
op_relation |
http://www.osti.gov/servlets/purl/1477276 https://www.osti.gov/biblio/1477276 https://doi.org/10.1002/2018JG004413 doi:10.1002/2018JG004413 |
op_doi |
https://doi.org/10.1002/2018JG004413 |
container_title |
Journal of Geophysical Research: Biogeosciences |
container_volume |
123 |
container_issue |
4 |
container_start_page |
1366 |
op_container_end_page |
1386 |
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1772812342194601984 |