Depth‐Resolved Physicochemical Characteristics of Active Layer and Permafrost Soils in an Arctic Polygonal Tundra Region
Abstract 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 inter...
Published in: | Journal of Geophysical Research: Biogeosciences |
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crwiley:10.1002/2018jg004413 2024-09-15T18:02:25+00:00 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 Biological and Environmental Research 2018 http://dx.doi.org/10.1002/2018jg004413 https://api.wiley.com/onlinelibrary/tdm/v1/articles/10.1002%2F2018JG004413 http://api.wiley.com/onlinelibrary/chorus/v1/articles/10.1002%2F2018JG004413 https://agupubs.onlinelibrary.wiley.com/doi/pdf/10.1002/2018JG004413 en eng Wiley http://creativecommons.org/licenses/by-nc-nd/4.0/ http://creativecommons.org/licenses/by-nc-nd/4.0/ Journal of Geophysical Research: Biogeosciences volume 123, issue 4, page 1366-1386 ISSN 2169-8953 2169-8961 journal-article 2018 crwiley https://doi.org/10.1002/2018jg004413 2024-08-01T04:19:26Z Abstract 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. Article in Journal/Newspaper Climate change permafrost Tundra Wiley Online Library Journal of Geophysical Research: Biogeosciences 123 4 1366 1386 |
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Wiley Online Library |
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English |
description |
Abstract 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. |
author2 |
Biological and Environmental Research |
format |
Article in Journal/Newspaper |
author |
Wu, Yuxin Ulrich, Craig Kneafsey, Timothy Lopez, Robin Chou, Chunwei Geller, Jil McKnight, Katie Dafflon, Baptiste Soom, Florian Peterson, John Hubbard, Susan |
spellingShingle |
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 |
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 |
publisher |
Wiley |
publishDate |
2018 |
url |
http://dx.doi.org/10.1002/2018jg004413 https://api.wiley.com/onlinelibrary/tdm/v1/articles/10.1002%2F2018JG004413 http://api.wiley.com/onlinelibrary/chorus/v1/articles/10.1002%2F2018JG004413 https://agupubs.onlinelibrary.wiley.com/doi/pdf/10.1002/2018JG004413 |
genre |
Climate change permafrost Tundra |
genre_facet |
Climate change permafrost Tundra |
op_source |
Journal of Geophysical Research: Biogeosciences volume 123, issue 4, page 1366-1386 ISSN 2169-8953 2169-8961 |
op_rights |
http://creativecommons.org/licenses/by-nc-nd/4.0/ http://creativecommons.org/licenses/by-nc-nd/4.0/ |
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 |
_version_ |
1810439872552370176 |