Total waterborne carbon export and DOC composition from ten nested subarctic peatland catchments—importance of peatland cover, groundwater influence, and inter‐annual variability of precipitation patterns
Abstract Waterborne carbon (C) export from terrestrial ecosystems is a potentially important flux for the net catchment C balance and links the biogeochemical C cycling of terrestrial ecosystems to their downstream aquatic ecosystems. We have monitored hydrology and stream chemistry over 3 years in...
Published in: | Hydrological Processes |
---|---|
Main Authors: | , , , |
Format: | Article in Journal/Newspaper |
Language: | English |
Published: |
Wiley
2012
|
Subjects: | |
Online Access: | http://dx.doi.org/10.1002/hyp.9358 https://api.wiley.com/onlinelibrary/tdm/v1/articles/10.1002%2Fhyp.9358 https://onlinelibrary.wiley.com/doi/pdf/10.1002/hyp.9358 |
id |
crwiley:10.1002/hyp.9358 |
---|---|
record_format |
openpolar |
spelling |
crwiley:10.1002/hyp.9358 2024-09-15T18:37:57+00:00 Total waterborne carbon export and DOC composition from ten nested subarctic peatland catchments—importance of peatland cover, groundwater influence, and inter‐annual variability of precipitation patterns Olefeldt, David Roulet, Nigel Giesler, Reiner Persson, Andreas 2012 http://dx.doi.org/10.1002/hyp.9358 https://api.wiley.com/onlinelibrary/tdm/v1/articles/10.1002%2Fhyp.9358 https://onlinelibrary.wiley.com/doi/pdf/10.1002/hyp.9358 en eng Wiley http://onlinelibrary.wiley.com/termsAndConditions#vor Hydrological Processes volume 27, issue 16, page 2280-2294 ISSN 0885-6087 1099-1085 journal-article 2012 crwiley https://doi.org/10.1002/hyp.9358 2024-08-30T04:08:56Z Abstract Waterborne carbon (C) export from terrestrial ecosystems is a potentially important flux for the net catchment C balance and links the biogeochemical C cycling of terrestrial ecosystems to their downstream aquatic ecosystems. We have monitored hydrology and stream chemistry over 3 years in ten nested catchments (0.6–15.1 km 2 ) with variable peatland cover (0%–22%) and groundwater influence in subarctic Sweden. Total waterborne C export, including dissolved and particulate organic carbon (DOC and POC) and dissolved inorganic carbon (DIC), ranged between 2.8 and 7.3 g m –2 year –1 , representing ~10%–30% of catchment net ecosystem exchange of CO 2 . Several characteristics of catchment waterborne C export were affected by interacting effects of peatland cover and groundwater influence, including magnitude and timing, partitioning into DOC, POC, and DIC and chemical composition of the exported DOC. Waterborne C export was greater during the wetter years, equivalent to an average change in export of ~2 g m –2 year –1 per 100 mm of precipitation. Wetter years led to a greater relative increase in DIC export than DOC export due to an inferred relative shift in dominance from shallow organic flow pathways to groundwater sources. Indices of DOC composition (SUVA 254 and a 250 /a 365 ) indicated that DOC aromaticity and average molecular weight increased with catchment peatland cover and decreased with increased groundwater influence. Our results provide examples on how waterborne C export and DOC composition might be affected by climate change. Copyright © 2012 John Wiley & Sons, Ltd. Article in Journal/Newspaper Subarctic Wiley Online Library Hydrological Processes 27 16 2280 2294 |
institution |
Open Polar |
collection |
Wiley Online Library |
op_collection_id |
crwiley |
language |
English |
description |
Abstract Waterborne carbon (C) export from terrestrial ecosystems is a potentially important flux for the net catchment C balance and links the biogeochemical C cycling of terrestrial ecosystems to their downstream aquatic ecosystems. We have monitored hydrology and stream chemistry over 3 years in ten nested catchments (0.6–15.1 km 2 ) with variable peatland cover (0%–22%) and groundwater influence in subarctic Sweden. Total waterborne C export, including dissolved and particulate organic carbon (DOC and POC) and dissolved inorganic carbon (DIC), ranged between 2.8 and 7.3 g m –2 year –1 , representing ~10%–30% of catchment net ecosystem exchange of CO 2 . Several characteristics of catchment waterborne C export were affected by interacting effects of peatland cover and groundwater influence, including magnitude and timing, partitioning into DOC, POC, and DIC and chemical composition of the exported DOC. Waterborne C export was greater during the wetter years, equivalent to an average change in export of ~2 g m –2 year –1 per 100 mm of precipitation. Wetter years led to a greater relative increase in DIC export than DOC export due to an inferred relative shift in dominance from shallow organic flow pathways to groundwater sources. Indices of DOC composition (SUVA 254 and a 250 /a 365 ) indicated that DOC aromaticity and average molecular weight increased with catchment peatland cover and decreased with increased groundwater influence. Our results provide examples on how waterborne C export and DOC composition might be affected by climate change. Copyright © 2012 John Wiley & Sons, Ltd. |
format |
Article in Journal/Newspaper |
author |
Olefeldt, David Roulet, Nigel Giesler, Reiner Persson, Andreas |
spellingShingle |
Olefeldt, David Roulet, Nigel Giesler, Reiner Persson, Andreas Total waterborne carbon export and DOC composition from ten nested subarctic peatland catchments—importance of peatland cover, groundwater influence, and inter‐annual variability of precipitation patterns |
author_facet |
Olefeldt, David Roulet, Nigel Giesler, Reiner Persson, Andreas |
author_sort |
Olefeldt, David |
title |
Total waterborne carbon export and DOC composition from ten nested subarctic peatland catchments—importance of peatland cover, groundwater influence, and inter‐annual variability of precipitation patterns |
title_short |
Total waterborne carbon export and DOC composition from ten nested subarctic peatland catchments—importance of peatland cover, groundwater influence, and inter‐annual variability of precipitation patterns |
title_full |
Total waterborne carbon export and DOC composition from ten nested subarctic peatland catchments—importance of peatland cover, groundwater influence, and inter‐annual variability of precipitation patterns |
title_fullStr |
Total waterborne carbon export and DOC composition from ten nested subarctic peatland catchments—importance of peatland cover, groundwater influence, and inter‐annual variability of precipitation patterns |
title_full_unstemmed |
Total waterborne carbon export and DOC composition from ten nested subarctic peatland catchments—importance of peatland cover, groundwater influence, and inter‐annual variability of precipitation patterns |
title_sort |
total waterborne carbon export and doc composition from ten nested subarctic peatland catchments—importance of peatland cover, groundwater influence, and inter‐annual variability of precipitation patterns |
publisher |
Wiley |
publishDate |
2012 |
url |
http://dx.doi.org/10.1002/hyp.9358 https://api.wiley.com/onlinelibrary/tdm/v1/articles/10.1002%2Fhyp.9358 https://onlinelibrary.wiley.com/doi/pdf/10.1002/hyp.9358 |
genre |
Subarctic |
genre_facet |
Subarctic |
op_source |
Hydrological Processes volume 27, issue 16, page 2280-2294 ISSN 0885-6087 1099-1085 |
op_rights |
http://onlinelibrary.wiley.com/termsAndConditions#vor |
op_doi |
https://doi.org/10.1002/hyp.9358 |
container_title |
Hydrological Processes |
container_volume |
27 |
container_issue |
16 |
container_start_page |
2280 |
op_container_end_page |
2294 |
_version_ |
1810482293691645952 |