Importance of lateral flux and its percolation depth on organic carbon export in Arctic tundra soil: Implications from a soil leaching experiment
Temperature rise in the Arctic is causing deepening of active layers and resulting in the mobilization of deep permafrost dissolved organic matter (DOM). However, the mechanisms of DOM mobilization from Arctic soils, especially upper soil horizons which are drained most frequently through a year, ar...
Published in: | Journal of Geophysical Research: Biogeosciences |
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Online Access: | http://www.osti.gov/servlets/purl/1364009 https://www.osti.gov/biblio/1364009 https://doi.org/10.1002/2016JG003754 |
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ftosti:oai:osti.gov:1364009 2023-07-30T04:00:50+02:00 Importance of lateral flux and its percolation depth on organic carbon export in Arctic tundra soil: Implications from a soil leaching experiment Zhang, Xiaowen Hutchings, Jack A. Bianchi, Thomas S. Liu, Yina Arellano, Ana R. Schuur, Edward A. G. 2022-05-23 application/pdf http://www.osti.gov/servlets/purl/1364009 https://www.osti.gov/biblio/1364009 https://doi.org/10.1002/2016JG003754 unknown http://www.osti.gov/servlets/purl/1364009 https://www.osti.gov/biblio/1364009 https://doi.org/10.1002/2016JG003754 doi:10.1002/2016JG003754 54 ENVIRONMENTAL SCIENCES 2022 ftosti https://doi.org/10.1002/2016JG003754 2023-07-11T09:19:13Z Temperature rise in the Arctic is causing deepening of active layers and resulting in the mobilization of deep permafrost dissolved organic matter (DOM). However, the mechanisms of DOM mobilization from Arctic soils, especially upper soil horizons which are drained most frequently through a year, are poorly understood. Here, we conducted a short-term leaching experiment on surface and deep organic active layer soils, from the Yukon River basin, to examine the effects of DOM transport on bulk and molecular characteristics. We report our data showed a net release of DOM from surface soils equal to an average of 5% of soil carbon. Conversely, deep soils percolated with surface leachates retained up to 27% of bulk DOM-while releasing fluorescent components (up to 107%), indicating selective release of aromatic components (e.g. lignin, tannin), while retaining non-chromophoric components, as supported by spectrofluorometric and ultra high resolution mass spectroscopic techniques. Our findings highlight the importance of the lateral flux of DOM on ecosystem carbon balance as well as processing of DOM transport through organic active layer soils en route to rivers and streams. This work also suggests the potential role of leachate export as an important mechanism of C losses from Arctic soils, in comparison with the more traditional pathway from soil to atmosphere in a warming Arctic. Other/Unknown Material Arctic permafrost Tundra Yukon river Yukon SciTec Connect (Office of Scientific and Technical Information - OSTI, U.S. Department of Energy) Arctic Yukon Journal of Geophysical Research: Biogeosciences 122 4 796 810 |
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SciTec Connect (Office of Scientific and Technical Information - OSTI, U.S. Department of Energy) |
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ftosti |
language |
unknown |
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54 ENVIRONMENTAL SCIENCES |
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54 ENVIRONMENTAL SCIENCES Zhang, Xiaowen Hutchings, Jack A. Bianchi, Thomas S. Liu, Yina Arellano, Ana R. Schuur, Edward A. G. Importance of lateral flux and its percolation depth on organic carbon export in Arctic tundra soil: Implications from a soil leaching experiment |
topic_facet |
54 ENVIRONMENTAL SCIENCES |
description |
Temperature rise in the Arctic is causing deepening of active layers and resulting in the mobilization of deep permafrost dissolved organic matter (DOM). However, the mechanisms of DOM mobilization from Arctic soils, especially upper soil horizons which are drained most frequently through a year, are poorly understood. Here, we conducted a short-term leaching experiment on surface and deep organic active layer soils, from the Yukon River basin, to examine the effects of DOM transport on bulk and molecular characteristics. We report our data showed a net release of DOM from surface soils equal to an average of 5% of soil carbon. Conversely, deep soils percolated with surface leachates retained up to 27% of bulk DOM-while releasing fluorescent components (up to 107%), indicating selective release of aromatic components (e.g. lignin, tannin), while retaining non-chromophoric components, as supported by spectrofluorometric and ultra high resolution mass spectroscopic techniques. Our findings highlight the importance of the lateral flux of DOM on ecosystem carbon balance as well as processing of DOM transport through organic active layer soils en route to rivers and streams. This work also suggests the potential role of leachate export as an important mechanism of C losses from Arctic soils, in comparison with the more traditional pathway from soil to atmosphere in a warming Arctic. |
author |
Zhang, Xiaowen Hutchings, Jack A. Bianchi, Thomas S. Liu, Yina Arellano, Ana R. Schuur, Edward A. G. |
author_facet |
Zhang, Xiaowen Hutchings, Jack A. Bianchi, Thomas S. Liu, Yina Arellano, Ana R. Schuur, Edward A. G. |
author_sort |
Zhang, Xiaowen |
title |
Importance of lateral flux and its percolation depth on organic carbon export in Arctic tundra soil: Implications from a soil leaching experiment |
title_short |
Importance of lateral flux and its percolation depth on organic carbon export in Arctic tundra soil: Implications from a soil leaching experiment |
title_full |
Importance of lateral flux and its percolation depth on organic carbon export in Arctic tundra soil: Implications from a soil leaching experiment |
title_fullStr |
Importance of lateral flux and its percolation depth on organic carbon export in Arctic tundra soil: Implications from a soil leaching experiment |
title_full_unstemmed |
Importance of lateral flux and its percolation depth on organic carbon export in Arctic tundra soil: Implications from a soil leaching experiment |
title_sort |
importance of lateral flux and its percolation depth on organic carbon export in arctic tundra soil: implications from a soil leaching experiment |
publishDate |
2022 |
url |
http://www.osti.gov/servlets/purl/1364009 https://www.osti.gov/biblio/1364009 https://doi.org/10.1002/2016JG003754 |
geographic |
Arctic Yukon |
geographic_facet |
Arctic Yukon |
genre |
Arctic permafrost Tundra Yukon river Yukon |
genre_facet |
Arctic permafrost Tundra Yukon river Yukon |
op_relation |
http://www.osti.gov/servlets/purl/1364009 https://www.osti.gov/biblio/1364009 https://doi.org/10.1002/2016JG003754 doi:10.1002/2016JG003754 |
op_doi |
https://doi.org/10.1002/2016JG003754 |
container_title |
Journal of Geophysical Research: Biogeosciences |
container_volume |
122 |
container_issue |
4 |
container_start_page |
796 |
op_container_end_page |
810 |
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1772811500554027008 |