Seasonal and hydrologic drivers of dissolved organic matter and nutrients in the upper Kuparuk River, Alaskan Arctic
© The Authors, 2010. This article is distributed under the terms of the Creative Commons Attribution Noncommercial License. The definitive version was published in Biogeochemistry 103 (2011): 109-124, doi:10.1007/s10533-010-9451-4. As the planet warms, widespread changes in Arctic hydrology and biog...
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ftwhoas:oai:darchive.mblwhoilibrary.org:1912/4413 2023-05-15T14:38:46+02:00 Seasonal and hydrologic drivers of dissolved organic matter and nutrients in the upper Kuparuk River, Alaskan Arctic Townsend-Small, Amy McClelland, James W. Holmes, Robert M. Peterson, Bruce J. 2010-05-08 application/pdf https://hdl.handle.net/1912/4413 en_US eng Springer https://doi.org/10.1007/s10533-010-9451-4 Biogeochemistry 103 (2011): 109-124 https://hdl.handle.net/1912/4413 doi:10.1007/s10533-010-9451-4 Attribution-NonCommercial 3.0 Unported http://creativecommons.org/licenses/by-nc/3.0/ CC-BY-NC Biogeochemistry 103 (2011): 109-124 doi:10.1007/s10533-010-9451-4 Arctic Stream Headwaters Carbon Nitrogen Nutrients Article 2010 ftwhoas https://doi.org/10.1007/s10533-010-9451-4 2022-05-28T22:58:18Z © The Authors, 2010. This article is distributed under the terms of the Creative Commons Attribution Noncommercial License. The definitive version was published in Biogeochemistry 103 (2011): 109-124, doi:10.1007/s10533-010-9451-4. As the planet warms, widespread changes in Arctic hydrology and biogeochemistry have been documented and these changes are expected to accelerate in the future. Improved understanding of the behavior of water-borne constituents in Arctic rivers with varying hydrologic conditions, including seasonal variations in discharge–concentration relationships, will improve our ability to anticipate future changes in biogeochemical budgets due to changing hydrology. We studied the relationship between seasonal water discharge and dissolved organic carbon and nitrogen (DOC and DON) and nutrient concentrations in the upper Kuparuk River, Arctic Alaska. Fluxes of most constituents were highest during initial snowmelt runoff in spring, indicating that this historically under-studied period contributes significantly to total annual export. In particular, the initial snowmelt period (the stream is completely frozen during the winter) accounted for upwards of 35% of total export of DOC and DON estimated for the entire study period. DOC and DON concentrations were positively correlated with discharge whereas nitrate (NO3 −) and silicate were negatively correlated with discharge throughout the study. However, discharge-specific DOC and DON concentrations (i.e. concentrations compared at the same discharge level) decreased over the summer whereas discharge-specific concentrations of NO3 − and silicate increased. Soluble reactive phosphorus (SRP) and ammonium (NH4 +) were negatively correlated with discharge during the spring thaw, but were less predictable with respect to discharge thereafter. These data provide valuable information on how Arctic watershed biogeochemistry will be affected by future changes in temperature, snowfall, and rainfall in the Arctic. In particular, our results add to a growing ... Article in Journal/Newspaper Arctic Alaska Woods Hole Scientific Community: WHOAS (Woods Hole Open Access Server) Arctic Biogeochemistry 103 1-3 109 124 |
institution |
Open Polar |
collection |
Woods Hole Scientific Community: WHOAS (Woods Hole Open Access Server) |
op_collection_id |
ftwhoas |
language |
English |
topic |
Arctic Stream Headwaters Carbon Nitrogen Nutrients |
spellingShingle |
Arctic Stream Headwaters Carbon Nitrogen Nutrients Townsend-Small, Amy McClelland, James W. Holmes, Robert M. Peterson, Bruce J. Seasonal and hydrologic drivers of dissolved organic matter and nutrients in the upper Kuparuk River, Alaskan Arctic |
topic_facet |
Arctic Stream Headwaters Carbon Nitrogen Nutrients |
description |
© The Authors, 2010. This article is distributed under the terms of the Creative Commons Attribution Noncommercial License. The definitive version was published in Biogeochemistry 103 (2011): 109-124, doi:10.1007/s10533-010-9451-4. As the planet warms, widespread changes in Arctic hydrology and biogeochemistry have been documented and these changes are expected to accelerate in the future. Improved understanding of the behavior of water-borne constituents in Arctic rivers with varying hydrologic conditions, including seasonal variations in discharge–concentration relationships, will improve our ability to anticipate future changes in biogeochemical budgets due to changing hydrology. We studied the relationship between seasonal water discharge and dissolved organic carbon and nitrogen (DOC and DON) and nutrient concentrations in the upper Kuparuk River, Arctic Alaska. Fluxes of most constituents were highest during initial snowmelt runoff in spring, indicating that this historically under-studied period contributes significantly to total annual export. In particular, the initial snowmelt period (the stream is completely frozen during the winter) accounted for upwards of 35% of total export of DOC and DON estimated for the entire study period. DOC and DON concentrations were positively correlated with discharge whereas nitrate (NO3 −) and silicate were negatively correlated with discharge throughout the study. However, discharge-specific DOC and DON concentrations (i.e. concentrations compared at the same discharge level) decreased over the summer whereas discharge-specific concentrations of NO3 − and silicate increased. Soluble reactive phosphorus (SRP) and ammonium (NH4 +) were negatively correlated with discharge during the spring thaw, but were less predictable with respect to discharge thereafter. These data provide valuable information on how Arctic watershed biogeochemistry will be affected by future changes in temperature, snowfall, and rainfall in the Arctic. In particular, our results add to a growing ... |
format |
Article in Journal/Newspaper |
author |
Townsend-Small, Amy McClelland, James W. Holmes, Robert M. Peterson, Bruce J. |
author_facet |
Townsend-Small, Amy McClelland, James W. Holmes, Robert M. Peterson, Bruce J. |
author_sort |
Townsend-Small, Amy |
title |
Seasonal and hydrologic drivers of dissolved organic matter and nutrients in the upper Kuparuk River, Alaskan Arctic |
title_short |
Seasonal and hydrologic drivers of dissolved organic matter and nutrients in the upper Kuparuk River, Alaskan Arctic |
title_full |
Seasonal and hydrologic drivers of dissolved organic matter and nutrients in the upper Kuparuk River, Alaskan Arctic |
title_fullStr |
Seasonal and hydrologic drivers of dissolved organic matter and nutrients in the upper Kuparuk River, Alaskan Arctic |
title_full_unstemmed |
Seasonal and hydrologic drivers of dissolved organic matter and nutrients in the upper Kuparuk River, Alaskan Arctic |
title_sort |
seasonal and hydrologic drivers of dissolved organic matter and nutrients in the upper kuparuk river, alaskan arctic |
publisher |
Springer |
publishDate |
2010 |
url |
https://hdl.handle.net/1912/4413 |
geographic |
Arctic |
geographic_facet |
Arctic |
genre |
Arctic Alaska |
genre_facet |
Arctic Alaska |
op_source |
Biogeochemistry 103 (2011): 109-124 doi:10.1007/s10533-010-9451-4 |
op_relation |
https://doi.org/10.1007/s10533-010-9451-4 Biogeochemistry 103 (2011): 109-124 https://hdl.handle.net/1912/4413 doi:10.1007/s10533-010-9451-4 |
op_rights |
Attribution-NonCommercial 3.0 Unported http://creativecommons.org/licenses/by-nc/3.0/ |
op_rightsnorm |
CC-BY-NC |
op_doi |
https://doi.org/10.1007/s10533-010-9451-4 |
container_title |
Biogeochemistry |
container_volume |
103 |
container_issue |
1-3 |
container_start_page |
109 |
op_container_end_page |
124 |
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1766310797381730304 |