Hydrology and dissolved organic carbon biogeochemistry in an ombrotrophic bog
At the Mer Bleue bog, Ontario, Canada, DOC export measured at the basin outflow was −8·3 ± 3·7 g C m−2 yr−1, and DOC loading via precipitation was estimated to be 1·5 ± 0·7 g C m−2 yr−1. Discharge and DOC export calculated using a Dupuit–Forchheimer approximation compared well (within 1 g C m−2 yr−1...
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| Veröffentlicht in: | Hydrological processes 2001-11, Vol.15 (16), p.3151-3166 |
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| creator | Fraser, C. J. D. Roulet, N. T. Moore, T. R. |
| description | At the Mer Bleue bog, Ontario, Canada, DOC export measured at the basin outflow was −8·3 ± 3·7 g C m−2 yr−1, and DOC loading via precipitation was estimated to be 1·5 ± 0·7 g C m−2 yr−1. Discharge and DOC export calculated using a Dupuit–Forchheimer approximation compared well (within 1 g C m−2 yr−1) to outflow estimates of DOC export, and confirmed that outflow measurements were a suitable proxy for DOC seepage at the peatland margins. DOC export was 12% of the magnitude of the residual carbon sink measured at the peatland. The [DOC] across groundwater transects decreased with depth, and [DOC] sampled below 0·75 m depths remained fairly constant over the study period. However, [DOC] exported through the acrotelm (0 to 0·45 m peat depth) was variable, ranging from 40 mg l−1 after snowmelt to 70 mg l−1 during the growing season. Fluorescence analysis revealed that exported DOC was ‘allochthonous‐like’, whereas DOC in the catotelm (deeper layers of peat) became more ‘autochthonous‐like’ with depth. A conceptual model is developed to summarize the hydrological processes and controls which affect DOC biogeochemistry at the Mer Bleue. Copyright © 2001 John Wiley & Sons, Ltd. |
| doi_str_mv | 10.1002/hyp.322 |
| format | Article |
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J. D. ; Roulet, N. T. ; Moore, T. R.</creator><creatorcontrib>Fraser, C. J. D. ; Roulet, N. T. ; Moore, T. R.</creatorcontrib><description>At the Mer Bleue bog, Ontario, Canada, DOC export measured at the basin outflow was −8·3 ± 3·7 g C m−2 yr−1, and DOC loading via precipitation was estimated to be 1·5 ± 0·7 g C m−2 yr−1. Discharge and DOC export calculated using a Dupuit–Forchheimer approximation compared well (within 1 g C m−2 yr−1) to outflow estimates of DOC export, and confirmed that outflow measurements were a suitable proxy for DOC seepage at the peatland margins. DOC export was 12% of the magnitude of the residual carbon sink measured at the peatland. The [DOC] across groundwater transects decreased with depth, and [DOC] sampled below 0·75 m depths remained fairly constant over the study period. However, [DOC] exported through the acrotelm (0 to 0·45 m peat depth) was variable, ranging from 40 mg l−1 after snowmelt to 70 mg l−1 during the growing season. Fluorescence analysis revealed that exported DOC was ‘allochthonous‐like’, whereas DOC in the catotelm (deeper layers of peat) became more ‘autochthonous‐like’ with depth. A conceptual model is developed to summarize the hydrological processes and controls which affect DOC biogeochemistry at the Mer Bleue. Copyright © 2001 John Wiley & Sons, Ltd.</description><identifier>ISSN: 0885-6087</identifier><identifier>EISSN: 1099-1085</identifier><identifier>DOI: 10.1002/hyp.322</identifier><identifier>CODEN: HYPRE3</identifier><language>eng</language><publisher>Chichester, UK: John Wiley & Sons, Ltd</publisher><subject>carbon budgets ; DOC ; Earth sciences ; Earth, ocean, space ; Exact sciences and technology ; flowpath ; groundwater ; Hydrogeology ; Hydrology. 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J. D.</creatorcontrib><creatorcontrib>Roulet, N. T.</creatorcontrib><creatorcontrib>Moore, T. R.</creatorcontrib><title>Hydrology and dissolved organic carbon biogeochemistry in an ombrotrophic bog</title><title>Hydrological processes</title><addtitle>Hydrol. Process</addtitle><description>At the Mer Bleue bog, Ontario, Canada, DOC export measured at the basin outflow was −8·3 ± 3·7 g C m−2 yr−1, and DOC loading via precipitation was estimated to be 1·5 ± 0·7 g C m−2 yr−1. Discharge and DOC export calculated using a Dupuit–Forchheimer approximation compared well (within 1 g C m−2 yr−1) to outflow estimates of DOC export, and confirmed that outflow measurements were a suitable proxy for DOC seepage at the peatland margins. DOC export was 12% of the magnitude of the residual carbon sink measured at the peatland. The [DOC] across groundwater transects decreased with depth, and [DOC] sampled below 0·75 m depths remained fairly constant over the study period. However, [DOC] exported through the acrotelm (0 to 0·45 m peat depth) was variable, ranging from 40 mg l−1 after snowmelt to 70 mg l−1 during the growing season. Fluorescence analysis revealed that exported DOC was ‘allochthonous‐like’, whereas DOC in the catotelm (deeper layers of peat) became more ‘autochthonous‐like’ with depth. A conceptual model is developed to summarize the hydrological processes and controls which affect DOC biogeochemistry at the Mer Bleue. Copyright © 2001 John Wiley & Sons, Ltd.</description><subject>carbon budgets</subject><subject>DOC</subject><subject>Earth sciences</subject><subject>Earth, ocean, space</subject><subject>Exact sciences and technology</subject><subject>flowpath</subject><subject>groundwater</subject><subject>Hydrogeology</subject><subject>Hydrology. 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R.</au><format>journal</format><genre>article</genre><ristype>JOUR</ristype><atitle>Hydrology and dissolved organic carbon biogeochemistry in an ombrotrophic bog</atitle><jtitle>Hydrological processes</jtitle><addtitle>Hydrol. Process</addtitle><date>2001-11</date><risdate>2001</risdate><volume>15</volume><issue>16</issue><spage>3151</spage><epage>3166</epage><pages>3151-3166</pages><issn>0885-6087</issn><eissn>1099-1085</eissn><coden>HYPRE3</coden><abstract>At the Mer Bleue bog, Ontario, Canada, DOC export measured at the basin outflow was −8·3 ± 3·7 g C m−2 yr−1, and DOC loading via precipitation was estimated to be 1·5 ± 0·7 g C m−2 yr−1. Discharge and DOC export calculated using a Dupuit–Forchheimer approximation compared well (within 1 g C m−2 yr−1) to outflow estimates of DOC export, and confirmed that outflow measurements were a suitable proxy for DOC seepage at the peatland margins. DOC export was 12% of the magnitude of the residual carbon sink measured at the peatland. The [DOC] across groundwater transects decreased with depth, and [DOC] sampled below 0·75 m depths remained fairly constant over the study period. However, [DOC] exported through the acrotelm (0 to 0·45 m peat depth) was variable, ranging from 40 mg l−1 after snowmelt to 70 mg l−1 during the growing season. Fluorescence analysis revealed that exported DOC was ‘allochthonous‐like’, whereas DOC in the catotelm (deeper layers of peat) became more ‘autochthonous‐like’ with depth. A conceptual model is developed to summarize the hydrological processes and controls which affect DOC biogeochemistry at the Mer Bleue. Copyright © 2001 John Wiley & Sons, Ltd.</abstract><cop>Chichester, UK</cop><pub>John Wiley & Sons, Ltd</pub><doi>10.1002/hyp.322</doi><tpages>16</tpages></addata></record> |
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| subjects | carbon budgets DOC Earth sciences Earth, ocean, space Exact sciences and technology flowpath groundwater Hydrogeology Hydrology. Hydrogeology peatlands Soils Surficial geology |
| title | Hydrology and dissolved organic carbon biogeochemistry in an ombrotrophic bog |
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