Depth-Resolved Physicochemical Characteristics of Active Layer and Permafrost Soils in an Arctic Polygonal Tundra Region
©2018. The Authors. 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 the...
Published in: | Journal of Geophysical Research: Biogeosciences |
---|---|
Main Authors: | , , , , , , , , , , |
Format: | Article in Journal/Newspaper |
Language: | English |
Published: |
eScholarship, University of California
2018
|
Subjects: | |
Online Access: | http://www.escholarship.org/uc/item/3wg749qg |
id |
ftcdlib:qt3wg749qg |
---|---|
record_format |
openpolar |
spelling |
ftcdlib:qt3wg749qg 2023-05-15T14:26:49+02:00 Depth-Resolved Physicochemical Characteristics of Active Layer and Permafrost Soils in an Arctic Polygonal Tundra Region Wu, Y Ulrich, C Kneafsey, T Lopez, R Chou, C Geller, J McKnight, K Dafflon, B Soom, F Peterson, J Hubbard, S 1366 - 1386 2018-04-01 application/pdf http://www.escholarship.org/uc/item/3wg749qg english eng eScholarship, University of California qt3wg749qg http://www.escholarship.org/uc/item/3wg749qg public Wu, Y; Ulrich, C; Kneafsey, T; Lopez, R; Chou, C; Geller, J; et al.(2018). Depth-Resolved Physicochemical Characteristics of Active Layer and Permafrost Soils in an Arctic Polygonal Tundra Region. Journal of Geophysical Research: Biogeosciences, 123(4), 1366 - 1386. doi:10.1002/2018JG004413. Lawrence Berkeley National Laboratory: Retrieved from: http://www.escholarship.org/uc/item/3wg749qg article 2018 ftcdlib https://doi.org/10.1002/2018JG004413 2018-12-07T23:52:19Z ©2018. The Authors. 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 Arctic Arctic Climate change permafrost Tundra University of California: eScholarship Arctic Journal of Geophysical Research: Biogeosciences 123 4 1366 1386 |
institution |
Open Polar |
collection |
University of California: eScholarship |
op_collection_id |
ftcdlib |
language |
English |
description |
©2018. The Authors. 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. |
format |
Article in Journal/Newspaper |
author |
Wu, Y Ulrich, C Kneafsey, T Lopez, R Chou, C Geller, J McKnight, K Dafflon, B Soom, F Peterson, J Hubbard, S |
spellingShingle |
Wu, Y Ulrich, C Kneafsey, T Lopez, R Chou, C Geller, J McKnight, K Dafflon, B Soom, F Peterson, J Hubbard, S Depth-Resolved Physicochemical Characteristics of Active Layer and Permafrost Soils in an Arctic Polygonal Tundra Region |
author_facet |
Wu, Y Ulrich, C Kneafsey, T Lopez, R Chou, C Geller, J McKnight, K Dafflon, B Soom, F Peterson, J Hubbard, S |
author_sort |
Wu, Y |
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 |
eScholarship, University of California |
publishDate |
2018 |
url |
http://www.escholarship.org/uc/item/3wg749qg |
op_coverage |
1366 - 1386 |
geographic |
Arctic |
geographic_facet |
Arctic |
genre |
Arctic Arctic Climate change permafrost Tundra |
genre_facet |
Arctic Arctic Climate change permafrost Tundra |
op_source |
Wu, Y; Ulrich, C; Kneafsey, T; Lopez, R; Chou, C; Geller, J; et al.(2018). Depth-Resolved Physicochemical Characteristics of Active Layer and Permafrost Soils in an Arctic Polygonal Tundra Region. Journal of Geophysical Research: Biogeosciences, 123(4), 1366 - 1386. doi:10.1002/2018JG004413. Lawrence Berkeley National Laboratory: Retrieved from: http://www.escholarship.org/uc/item/3wg749qg |
op_relation |
qt3wg749qg http://www.escholarship.org/uc/item/3wg749qg |
op_rights |
public |
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_ |
1766300264913960960 |