Dissolved organic carbon fluxes in a discontinuous permafrost subarctic alpine catchment
The sources and fluxes of dissolved organic carbon (DOC) were investigated within a subarctic catchment with discontinuous permafrost (Granger Basin, Yukon) from 23 June 2001 to 22 June 2002. During spring freshet, stream DOC increased rapidly on the rising limb of the hydrograph, peaked prior to ma...
Published in: | Permafrost and Periglacial Processes |
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Online Access: | https://doi.org/10.1002/ppp.444 |
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ftrepec:oai:RePEc:wly:perpro:v:14:y:2003:i:2:p:161-171 2023-05-15T17:56:50+02:00 Dissolved organic carbon fluxes in a discontinuous permafrost subarctic alpine catchment Sean K. Carey https://doi.org/10.1002/ppp.444 unknown https://doi.org/10.1002/ppp.444 article ftrepec https://doi.org/10.1002/ppp.444 2020-12-04T13:31:25Z The sources and fluxes of dissolved organic carbon (DOC) were investigated within a subarctic catchment with discontinuous permafrost (Granger Basin, Yukon) from 23 June 2001 to 22 June 2002. During spring freshet, stream DOC increased rapidly on the rising limb of the hydrograph, peaked prior to maximum discharge, then declined exponentially to pre‐baseflow levels while flows remained high. During summer storms, a similar pattern was observed whereby DOC increased on the ascending hydrograph limbs and peaked prior to maximum flows. Suction lysimeter and well data indicate that most of the DOC was mobilized from within near‐surface organic soils. Comparisons between permafrost and seasonal frost slopes indicate that permafrost slopes are a greater source of DOC due to their thicker organic soils and wetter antecedent conditions that promote lateral flow in the shallower soil layers of the active layer. In contrast, slopes with seasonal frost encourage percolation and sorption of DOC in deeper mineral layers. Mass balance estimates of DOC export using actual and extrapolated data from regressions of DOC versus discharge indicate that 1.64 g C m−2 was exported from Granger Basin during the study year, 69% of this occurred during the 13 May to 22 June snowmelt period. Copyright © 2003 John Wiley & Sons, Ltd. Article in Journal/Newspaper permafrost Subarctic Yukon RePEc (Research Papers in Economics) Yukon Permafrost and Periglacial Processes 14 2 161 171 |
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Open Polar |
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RePEc (Research Papers in Economics) |
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ftrepec |
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description |
The sources and fluxes of dissolved organic carbon (DOC) were investigated within a subarctic catchment with discontinuous permafrost (Granger Basin, Yukon) from 23 June 2001 to 22 June 2002. During spring freshet, stream DOC increased rapidly on the rising limb of the hydrograph, peaked prior to maximum discharge, then declined exponentially to pre‐baseflow levels while flows remained high. During summer storms, a similar pattern was observed whereby DOC increased on the ascending hydrograph limbs and peaked prior to maximum flows. Suction lysimeter and well data indicate that most of the DOC was mobilized from within near‐surface organic soils. Comparisons between permafrost and seasonal frost slopes indicate that permafrost slopes are a greater source of DOC due to their thicker organic soils and wetter antecedent conditions that promote lateral flow in the shallower soil layers of the active layer. In contrast, slopes with seasonal frost encourage percolation and sorption of DOC in deeper mineral layers. Mass balance estimates of DOC export using actual and extrapolated data from regressions of DOC versus discharge indicate that 1.64 g C m−2 was exported from Granger Basin during the study year, 69% of this occurred during the 13 May to 22 June snowmelt period. Copyright © 2003 John Wiley & Sons, Ltd. |
format |
Article in Journal/Newspaper |
author |
Sean K. Carey |
spellingShingle |
Sean K. Carey Dissolved organic carbon fluxes in a discontinuous permafrost subarctic alpine catchment |
author_facet |
Sean K. Carey |
author_sort |
Sean K. Carey |
title |
Dissolved organic carbon fluxes in a discontinuous permafrost subarctic alpine catchment |
title_short |
Dissolved organic carbon fluxes in a discontinuous permafrost subarctic alpine catchment |
title_full |
Dissolved organic carbon fluxes in a discontinuous permafrost subarctic alpine catchment |
title_fullStr |
Dissolved organic carbon fluxes in a discontinuous permafrost subarctic alpine catchment |
title_full_unstemmed |
Dissolved organic carbon fluxes in a discontinuous permafrost subarctic alpine catchment |
title_sort |
dissolved organic carbon fluxes in a discontinuous permafrost subarctic alpine catchment |
url |
https://doi.org/10.1002/ppp.444 |
geographic |
Yukon |
geographic_facet |
Yukon |
genre |
permafrost Subarctic Yukon |
genre_facet |
permafrost Subarctic Yukon |
op_relation |
https://doi.org/10.1002/ppp.444 |
op_doi |
https://doi.org/10.1002/ppp.444 |
container_title |
Permafrost and Periglacial Processes |
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14 |
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2 |
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161 |
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171 |
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1766165124988534784 |