Modelling Holocene carbon accumulation and methane emissions of boreal wetlands – an Earth system model approach
Since the Last Glacial Maximum, boreal wetlands have accumulated substantial amounts of peat, estimated at 180–621 Pg of carbon. Wetlands have significantly affected the atmospheric greenhouse gas composition in the past and will play a significant role in future changes of atmospheric CO 2 and CH 4...
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ftcopernicus:oai:publications.copernicus.org:bg16234 2023-05-15T13:45:55+02:00 Modelling Holocene carbon accumulation and methane emissions of boreal wetlands – an Earth system model approach Schuldt, R. J. Brovkin, V. Kleinen, T. Winderlich, J. 2018-09-27 application/pdf https://doi.org/10.5194/bg-10-1659-2013 https://www.biogeosciences.net/10/1659/2013/ eng eng doi:10.5194/bg-10-1659-2013 https://www.biogeosciences.net/10/1659/2013/ eISSN: 1726-4189 Text 2018 ftcopernicus https://doi.org/10.5194/bg-10-1659-2013 2019-12-24T09:55:30Z Since the Last Glacial Maximum, boreal wetlands have accumulated substantial amounts of peat, estimated at 180–621 Pg of carbon. Wetlands have significantly affected the atmospheric greenhouse gas composition in the past and will play a significant role in future changes of atmospheric CO 2 and CH 4 concentrations. In order to investigate those changes with an Earth system model, biogeochemical processes in boreal wetlands need to be accounted for. Thus, a model of peat accumulation and decay was developed and included in the land surface model JSBACH of the Max Planck Institute Earth System Model (MPI-ESM). Here we present the evaluation of model results from 6000 yr BP to the pre-industrial period. Over this period of time, 240 Pg of peat carbon accumulated in the model in the areas north of 40° N. Simulated peat accumulation rates agree well with those reported for boreal wetlands. The model simulates CH 4 emissions of 49.3 Tg CH 4 yr −1 for 6000 yr BP and 51.5 Tg CH 4 yr −1 for pre-industrial times. This is within the range of estimates in the literature, which range from 32 to 112 Tg CH 4 yr −1 for boreal wetlands. The modelled methane emission for the West Siberian Lowlands and Hudson Bay Lowlands agree well with observations. The rising trend of methane emissions over the last 6000 yr is in agreement with measurements of Antarctic and Greenland ice cores. Text Antarc* Antarctic Greenland Greenland ice cores Hudson Bay Copernicus Publications: E-Journals Antarctic Greenland Hudson Hudson Bay Biogeosciences 10 3 1659 1674 |
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Copernicus Publications: E-Journals |
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English |
description |
Since the Last Glacial Maximum, boreal wetlands have accumulated substantial amounts of peat, estimated at 180–621 Pg of carbon. Wetlands have significantly affected the atmospheric greenhouse gas composition in the past and will play a significant role in future changes of atmospheric CO 2 and CH 4 concentrations. In order to investigate those changes with an Earth system model, biogeochemical processes in boreal wetlands need to be accounted for. Thus, a model of peat accumulation and decay was developed and included in the land surface model JSBACH of the Max Planck Institute Earth System Model (MPI-ESM). Here we present the evaluation of model results from 6000 yr BP to the pre-industrial period. Over this period of time, 240 Pg of peat carbon accumulated in the model in the areas north of 40° N. Simulated peat accumulation rates agree well with those reported for boreal wetlands. The model simulates CH 4 emissions of 49.3 Tg CH 4 yr −1 for 6000 yr BP and 51.5 Tg CH 4 yr −1 for pre-industrial times. This is within the range of estimates in the literature, which range from 32 to 112 Tg CH 4 yr −1 for boreal wetlands. The modelled methane emission for the West Siberian Lowlands and Hudson Bay Lowlands agree well with observations. The rising trend of methane emissions over the last 6000 yr is in agreement with measurements of Antarctic and Greenland ice cores. |
format |
Text |
author |
Schuldt, R. J. Brovkin, V. Kleinen, T. Winderlich, J. |
spellingShingle |
Schuldt, R. J. Brovkin, V. Kleinen, T. Winderlich, J. Modelling Holocene carbon accumulation and methane emissions of boreal wetlands – an Earth system model approach |
author_facet |
Schuldt, R. J. Brovkin, V. Kleinen, T. Winderlich, J. |
author_sort |
Schuldt, R. J. |
title |
Modelling Holocene carbon accumulation and methane emissions of boreal wetlands – an Earth system model approach |
title_short |
Modelling Holocene carbon accumulation and methane emissions of boreal wetlands – an Earth system model approach |
title_full |
Modelling Holocene carbon accumulation and methane emissions of boreal wetlands – an Earth system model approach |
title_fullStr |
Modelling Holocene carbon accumulation and methane emissions of boreal wetlands – an Earth system model approach |
title_full_unstemmed |
Modelling Holocene carbon accumulation and methane emissions of boreal wetlands – an Earth system model approach |
title_sort |
modelling holocene carbon accumulation and methane emissions of boreal wetlands – an earth system model approach |
publishDate |
2018 |
url |
https://doi.org/10.5194/bg-10-1659-2013 https://www.biogeosciences.net/10/1659/2013/ |
geographic |
Antarctic Greenland Hudson Hudson Bay |
geographic_facet |
Antarctic Greenland Hudson Hudson Bay |
genre |
Antarc* Antarctic Greenland Greenland ice cores Hudson Bay |
genre_facet |
Antarc* Antarctic Greenland Greenland ice cores Hudson Bay |
op_source |
eISSN: 1726-4189 |
op_relation |
doi:10.5194/bg-10-1659-2013 https://www.biogeosciences.net/10/1659/2013/ |
op_doi |
https://doi.org/10.5194/bg-10-1659-2013 |
container_title |
Biogeosciences |
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10 |
container_issue |
3 |
container_start_page |
1659 |
op_container_end_page |
1674 |
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1766232424427028480 |