Aquatic DOC export from subarctic Atlantic blanket bog in Norway is controlled by seasalt deposition, temperature and precipitation
Comprehensive and credible peatland carbon budgets, needed for global carbon accounting, must include lateral aquatic organic carbon export. Here, we quantify aquatic dissolved organic carbon (DOC) export for an Atlantic bog in subarctic Norway, the Andøya peatland, and test for sensitivity to clima...
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ftnorskinstvf:oai:niva.brage.unit.no:11250/2563599 2023-05-15T13:25:37+02:00 Aquatic DOC export from subarctic Atlantic blanket bog in Norway is controlled by seasalt deposition, temperature and precipitation de Wit, Heleen A Ledesma, Jose L J Futter, Martyn N. 2016 application/pdf http://hdl.handle.net/11250/2563599 https://doi.org/10.1007/s10533-016-0182-z eng eng Springer Verlag Norges forskningsråd: 224779 Nordforsk: 60501 Biogeochemistry. 2016, 127 (2), 305-321. urn:issn:0168-2563 http://hdl.handle.net/11250/2563599 https://doi.org/10.1007/s10533-016-0182-z cristin:1445110 Navngivelse 4.0 Internasjonal http://creativecommons.org/licenses/by/4.0/deed.no The Author(s) 2016 CC-BY 305-321 127 Biogeochemistry 2 Journal article Peer reviewed 2016 ftnorskinstvf https://doi.org/10.1007/s10533-016-0182-z 2023-02-21T08:44:58Z Comprehensive and credible peatland carbon budgets, needed for global carbon accounting, must include lateral aquatic organic carbon export. Here, we quantify aquatic dissolved organic carbon (DOC) export for an Atlantic bog in subarctic Norway, the Andøya peatland, and test for sensitivity to climatic drivers. Hydrology, DOC concentrations and DOC export were simulated for 2000–2013 using the process-based catchment model Integrated Catchments model for Carbon (INCA-C), calibrated to site-specific water chemistry and hydrology (2011–2014) using readily-available data on temperature, precipitation and seasalt deposition. Measured streamwater DOC declined under seasalt episodes and was strongly positively related to temperature. Model calibrations successfully reproduced the water balance, variation in runoff (R2 = 0.67; Nash–Sutcliffe model efficiency NS = 0.67) and DOC concentrations (R2 = 0.85; NS = 0.84). The most sensitive model parameters related to temperature-sensitivity of DOC production and DOC (de)sorption sensitivity to seasalts. Model uncertainty related to parameter space was similar to interannual variation in DOC export. Mean annual modelled DOC export was 7.2 ± 0.7 g C m−2 year−1, roughly 35 % of the net land–atmospheric CO2 exchange at Andøya from 2009 to 2012 (estimated elsewhere). Current and antecedent mean temperature and precipitation were strong drivers of seasonal modelled DOC export, implying that warmer and wetter summers will lead to more DOC export. Evaluation of similar climate impacts on net peatland carbon accumulation requires additional exploration of the climate-sensitivity of land–atmosphere fluxes of CO2 and methane. Process-based models are valuable tools to account for lateral DOC exports in carbon balances of northern peatlands, especially where long-term monitoring data are lacking. publishedVersion Article in Journal/Newspaper Andøya Subarctic Norwegian Institute for Water research: NIVA Open Access Archive (Brage) Andøya ENVELOPE(13.982,13.982,68.185,68.185) Inca ENVELOPE(-59.194,-59.194,-62.308,-62.308) Nash ENVELOPE(-62.350,-62.350,-74.233,-74.233) Norway Sutcliffe ENVELOPE(-81.383,-81.383,50.683,50.683) Biogeochemistry 127 2-3 305 321 |
institution |
Open Polar |
collection |
Norwegian Institute for Water research: NIVA Open Access Archive (Brage) |
op_collection_id |
ftnorskinstvf |
language |
English |
description |
Comprehensive and credible peatland carbon budgets, needed for global carbon accounting, must include lateral aquatic organic carbon export. Here, we quantify aquatic dissolved organic carbon (DOC) export for an Atlantic bog in subarctic Norway, the Andøya peatland, and test for sensitivity to climatic drivers. Hydrology, DOC concentrations and DOC export were simulated for 2000–2013 using the process-based catchment model Integrated Catchments model for Carbon (INCA-C), calibrated to site-specific water chemistry and hydrology (2011–2014) using readily-available data on temperature, precipitation and seasalt deposition. Measured streamwater DOC declined under seasalt episodes and was strongly positively related to temperature. Model calibrations successfully reproduced the water balance, variation in runoff (R2 = 0.67; Nash–Sutcliffe model efficiency NS = 0.67) and DOC concentrations (R2 = 0.85; NS = 0.84). The most sensitive model parameters related to temperature-sensitivity of DOC production and DOC (de)sorption sensitivity to seasalts. Model uncertainty related to parameter space was similar to interannual variation in DOC export. Mean annual modelled DOC export was 7.2 ± 0.7 g C m−2 year−1, roughly 35 % of the net land–atmospheric CO2 exchange at Andøya from 2009 to 2012 (estimated elsewhere). Current and antecedent mean temperature and precipitation were strong drivers of seasonal modelled DOC export, implying that warmer and wetter summers will lead to more DOC export. Evaluation of similar climate impacts on net peatland carbon accumulation requires additional exploration of the climate-sensitivity of land–atmosphere fluxes of CO2 and methane. Process-based models are valuable tools to account for lateral DOC exports in carbon balances of northern peatlands, especially where long-term monitoring data are lacking. publishedVersion |
format |
Article in Journal/Newspaper |
author |
de Wit, Heleen A Ledesma, Jose L J Futter, Martyn N. |
spellingShingle |
de Wit, Heleen A Ledesma, Jose L J Futter, Martyn N. Aquatic DOC export from subarctic Atlantic blanket bog in Norway is controlled by seasalt deposition, temperature and precipitation |
author_facet |
de Wit, Heleen A Ledesma, Jose L J Futter, Martyn N. |
author_sort |
de Wit, Heleen A |
title |
Aquatic DOC export from subarctic Atlantic blanket bog in Norway is controlled by seasalt deposition, temperature and precipitation |
title_short |
Aquatic DOC export from subarctic Atlantic blanket bog in Norway is controlled by seasalt deposition, temperature and precipitation |
title_full |
Aquatic DOC export from subarctic Atlantic blanket bog in Norway is controlled by seasalt deposition, temperature and precipitation |
title_fullStr |
Aquatic DOC export from subarctic Atlantic blanket bog in Norway is controlled by seasalt deposition, temperature and precipitation |
title_full_unstemmed |
Aquatic DOC export from subarctic Atlantic blanket bog in Norway is controlled by seasalt deposition, temperature and precipitation |
title_sort |
aquatic doc export from subarctic atlantic blanket bog in norway is controlled by seasalt deposition, temperature and precipitation |
publisher |
Springer Verlag |
publishDate |
2016 |
url |
http://hdl.handle.net/11250/2563599 https://doi.org/10.1007/s10533-016-0182-z |
long_lat |
ENVELOPE(13.982,13.982,68.185,68.185) ENVELOPE(-59.194,-59.194,-62.308,-62.308) ENVELOPE(-62.350,-62.350,-74.233,-74.233) ENVELOPE(-81.383,-81.383,50.683,50.683) |
geographic |
Andøya Inca Nash Norway Sutcliffe |
geographic_facet |
Andøya Inca Nash Norway Sutcliffe |
genre |
Andøya Subarctic |
genre_facet |
Andøya Subarctic |
op_source |
305-321 127 Biogeochemistry 2 |
op_relation |
Norges forskningsråd: 224779 Nordforsk: 60501 Biogeochemistry. 2016, 127 (2), 305-321. urn:issn:0168-2563 http://hdl.handle.net/11250/2563599 https://doi.org/10.1007/s10533-016-0182-z cristin:1445110 |
op_rights |
Navngivelse 4.0 Internasjonal http://creativecommons.org/licenses/by/4.0/deed.no The Author(s) 2016 |
op_rightsnorm |
CC-BY |
op_doi |
https://doi.org/10.1007/s10533-016-0182-z |
container_title |
Biogeochemistry |
container_volume |
127 |
container_issue |
2-3 |
container_start_page |
305 |
op_container_end_page |
321 |
_version_ |
1766386755805642752 |