Dissolved organic carbon fluxes in a discontinuous permafrost subarctic alpine catchment
Abstract 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 pr...
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crwiley:10.1002/ppp.444 2024-06-02T08:13:01+00:00 Dissolved organic carbon fluxes in a discontinuous permafrost subarctic alpine catchment Carey, Sean K. 2003 http://dx.doi.org/10.1002/ppp.444 https://api.wiley.com/onlinelibrary/tdm/v1/articles/10.1002%2Fppp.444 https://onlinelibrary.wiley.com/doi/pdf/10.1002/ppp.444 en eng Wiley http://onlinelibrary.wiley.com/termsAndConditions#vor Permafrost and Periglacial Processes volume 14, issue 2, page 161-171 ISSN 1045-6740 1099-1530 journal-article 2003 crwiley https://doi.org/10.1002/ppp.444 2024-05-03T10:53:14Z Abstract 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 Permafrost and Periglacial Processes Subarctic Yukon Wiley Online Library Yukon Permafrost and Periglacial Processes 14 2 161 171 |
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English |
description |
Abstract 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 |
Carey, Sean K. |
spellingShingle |
Carey, Sean K. Dissolved organic carbon fluxes in a discontinuous permafrost subarctic alpine catchment |
author_facet |
Carey, Sean K. |
author_sort |
Carey, Sean K. |
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 |
publisher |
Wiley |
publishDate |
2003 |
url |
http://dx.doi.org/10.1002/ppp.444 https://api.wiley.com/onlinelibrary/tdm/v1/articles/10.1002%2Fppp.444 https://onlinelibrary.wiley.com/doi/pdf/10.1002/ppp.444 |
geographic |
Yukon |
geographic_facet |
Yukon |
genre |
permafrost Permafrost and Periglacial Processes Subarctic Yukon |
genre_facet |
permafrost Permafrost and Periglacial Processes Subarctic Yukon |
op_source |
Permafrost and Periglacial Processes volume 14, issue 2, page 161-171 ISSN 1045-6740 1099-1530 |
op_rights |
http://onlinelibrary.wiley.com/termsAndConditions#vor |
op_doi |
https://doi.org/10.1002/ppp.444 |
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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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1800759643007352832 |