Environmental controls on observed spatial variability of soil pore water geochemistry in small headwater catchments underlain with permafrost
Soil pore water (SPW) chemistry can vary substantially across multiple scales in Arctic permafrost landscapes. The magnitude of these variations and their relationship to scale are critical considerations for understanding current controls on geochemical cycling and for predicting future changes. Th...
Published in: | The Cryosphere |
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Language: | English |
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Copernicus Publications
2023
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Online Access: | https://doi.org/10.5194/tc-17-3987-2023 https://doaj.org/article/4dc0619990954b038b401817bf233cc8 |
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ftdoajarticles:oai:doaj.org/article:4dc0619990954b038b401817bf233cc8 2023-10-09T21:48:41+02:00 Environmental controls on observed spatial variability of soil pore water geochemistry in small headwater catchments underlain with permafrost N. A. Conroy J. M. Heikoop E. Lathrop D. Musa B. D. Newman C. Xu R. E. McCaully C. A. Arendt V. G. Salmon A. Breen V. Romanovsky K. E. Bennett C. J. Wilson S. D. Wullschleger 2023-09-01T00:00:00Z https://doi.org/10.5194/tc-17-3987-2023 https://doaj.org/article/4dc0619990954b038b401817bf233cc8 EN eng Copernicus Publications https://tc.copernicus.org/articles/17/3987/2023/tc-17-3987-2023.pdf https://doaj.org/toc/1994-0416 https://doaj.org/toc/1994-0424 doi:10.5194/tc-17-3987-2023 1994-0416 1994-0424 https://doaj.org/article/4dc0619990954b038b401817bf233cc8 The Cryosphere, Vol 17, Pp 3987-4006 (2023) Environmental sciences GE1-350 Geology QE1-996.5 article 2023 ftdoajarticles https://doi.org/10.5194/tc-17-3987-2023 2023-09-17T00:36:30Z Soil pore water (SPW) chemistry can vary substantially across multiple scales in Arctic permafrost landscapes. The magnitude of these variations and their relationship to scale are critical considerations for understanding current controls on geochemical cycling and for predicting future changes. These aspects are especially important for Arctic change modeling where accurate representation of sub-grid variability may be necessary to predict watershed-scale behaviors. Our research goal is to characterize intra- and inter-watershed soil water geochemical variations at two contrasting locations in the Seward Peninsula of Alaska, USA. We then attempt to identify the key factors controlling concentrations of important pore water solutes in these systems. The SPW geochemistry of 18 locations spanning two small Arctic catchments was examined for spatial variability and its dominant environmental controls. The primary environmental controls considered were vegetation, soil moisture and/or redox condition, water–soil interactions and hydrologic transport, and mineral solubility. The sampling locations varied in terms of vegetation type and canopy height, presence or absence of near-surface permafrost, soil moisture, and hillslope position. Vegetation was found to have a significant impact on SPW NO 3 - <svg:svg xmlns:svg="http://www.w3.org/2000/svg" width="9pt" height="16pt" class="svg-formula" dspmath="mathimg" md5hash="5c4cefaf8b78d41c1ce2f2ef151f712f"><svg:image xmlns:xlink="http://www.w3.org/1999/xlink" xlink:href="tc-17-3987-2023-ie00001.svg" width="9pt" height="16pt" src="tc-17-3987-2023-ie00001.png"/></svg:svg> concentrations, associated with the localized presence of nitrogen-fixing alders and mineralization and nitrification of leaf litter from tall willow shrubs. The elevated NO 3 - <svg:svg xmlns:svg="http://www.w3.org/2000/svg" width="9pt" height="16pt" class="svg-formula" dspmath="mathimg" md5hash="53e1f98be2cdf70dbe180d95894fc6b5"><svg:image ... Article in Journal/Newspaper Arctic permafrost Seward Peninsula The Cryosphere Alaska Directory of Open Access Journals: DOAJ Articles Arctic The Cryosphere 17 9 3987 4006 |
institution |
Open Polar |
collection |
Directory of Open Access Journals: DOAJ Articles |
op_collection_id |
ftdoajarticles |
language |
English |
topic |
Environmental sciences GE1-350 Geology QE1-996.5 |
spellingShingle |
Environmental sciences GE1-350 Geology QE1-996.5 N. A. Conroy J. M. Heikoop E. Lathrop D. Musa B. D. Newman C. Xu R. E. McCaully C. A. Arendt V. G. Salmon A. Breen V. Romanovsky K. E. Bennett C. J. Wilson S. D. Wullschleger Environmental controls on observed spatial variability of soil pore water geochemistry in small headwater catchments underlain with permafrost |
topic_facet |
Environmental sciences GE1-350 Geology QE1-996.5 |
description |
Soil pore water (SPW) chemistry can vary substantially across multiple scales in Arctic permafrost landscapes. The magnitude of these variations and their relationship to scale are critical considerations for understanding current controls on geochemical cycling and for predicting future changes. These aspects are especially important for Arctic change modeling where accurate representation of sub-grid variability may be necessary to predict watershed-scale behaviors. Our research goal is to characterize intra- and inter-watershed soil water geochemical variations at two contrasting locations in the Seward Peninsula of Alaska, USA. We then attempt to identify the key factors controlling concentrations of important pore water solutes in these systems. The SPW geochemistry of 18 locations spanning two small Arctic catchments was examined for spatial variability and its dominant environmental controls. The primary environmental controls considered were vegetation, soil moisture and/or redox condition, water–soil interactions and hydrologic transport, and mineral solubility. The sampling locations varied in terms of vegetation type and canopy height, presence or absence of near-surface permafrost, soil moisture, and hillslope position. Vegetation was found to have a significant impact on SPW NO 3 - <svg:svg xmlns:svg="http://www.w3.org/2000/svg" width="9pt" height="16pt" class="svg-formula" dspmath="mathimg" md5hash="5c4cefaf8b78d41c1ce2f2ef151f712f"><svg:image xmlns:xlink="http://www.w3.org/1999/xlink" xlink:href="tc-17-3987-2023-ie00001.svg" width="9pt" height="16pt" src="tc-17-3987-2023-ie00001.png"/></svg:svg> concentrations, associated with the localized presence of nitrogen-fixing alders and mineralization and nitrification of leaf litter from tall willow shrubs. The elevated NO 3 - <svg:svg xmlns:svg="http://www.w3.org/2000/svg" width="9pt" height="16pt" class="svg-formula" dspmath="mathimg" md5hash="53e1f98be2cdf70dbe180d95894fc6b5"><svg:image ... |
format |
Article in Journal/Newspaper |
author |
N. A. Conroy J. M. Heikoop E. Lathrop D. Musa B. D. Newman C. Xu R. E. McCaully C. A. Arendt V. G. Salmon A. Breen V. Romanovsky K. E. Bennett C. J. Wilson S. D. Wullschleger |
author_facet |
N. A. Conroy J. M. Heikoop E. Lathrop D. Musa B. D. Newman C. Xu R. E. McCaully C. A. Arendt V. G. Salmon A. Breen V. Romanovsky K. E. Bennett C. J. Wilson S. D. Wullschleger |
author_sort |
N. A. Conroy |
title |
Environmental controls on observed spatial variability of soil pore water geochemistry in small headwater catchments underlain with permafrost |
title_short |
Environmental controls on observed spatial variability of soil pore water geochemistry in small headwater catchments underlain with permafrost |
title_full |
Environmental controls on observed spatial variability of soil pore water geochemistry in small headwater catchments underlain with permafrost |
title_fullStr |
Environmental controls on observed spatial variability of soil pore water geochemistry in small headwater catchments underlain with permafrost |
title_full_unstemmed |
Environmental controls on observed spatial variability of soil pore water geochemistry in small headwater catchments underlain with permafrost |
title_sort |
environmental controls on observed spatial variability of soil pore water geochemistry in small headwater catchments underlain with permafrost |
publisher |
Copernicus Publications |
publishDate |
2023 |
url |
https://doi.org/10.5194/tc-17-3987-2023 https://doaj.org/article/4dc0619990954b038b401817bf233cc8 |
geographic |
Arctic |
geographic_facet |
Arctic |
genre |
Arctic permafrost Seward Peninsula The Cryosphere Alaska |
genre_facet |
Arctic permafrost Seward Peninsula The Cryosphere Alaska |
op_source |
The Cryosphere, Vol 17, Pp 3987-4006 (2023) |
op_relation |
https://tc.copernicus.org/articles/17/3987/2023/tc-17-3987-2023.pdf https://doaj.org/toc/1994-0416 https://doaj.org/toc/1994-0424 doi:10.5194/tc-17-3987-2023 1994-0416 1994-0424 https://doaj.org/article/4dc0619990954b038b401817bf233cc8 |
op_doi |
https://doi.org/10.5194/tc-17-3987-2023 |
container_title |
The Cryosphere |
container_volume |
17 |
container_issue |
9 |
container_start_page |
3987 |
op_container_end_page |
4006 |
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1779311775696551936 |