Modelling past and future peatland carbon dynamics across the pan-Arctic
The majority of northern peatlands were initiated during the Holocene. Owing to their mass imbalance, they have sequestered huge amounts of carbon in terrestrial ecosystems. Although recent syntheses have filled some knowledge gaps, the extent and remoteness of many peatlands pose challenges to deve...
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Online Access: | https://doi.org/10.1111/gcb.15099 https://hdl.handle.net/1959.7/uws:59878 |
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ftunivwestsyd:oai:researchdirect.westernsydney.edu.au:uws_59878 2023-05-15T14:55:34+02:00 Modelling past and future peatland carbon dynamics across the pan-Arctic Chaudhary, Nitin Westermann, Sebastian Lamba, Shubhangi Shurpali, Narasinha J. Sannel, Anna B. Schurgers, Guy Miller, Paul A. Smith, Benjamin (R19508) 2020 print 15 https://doi.org/10.1111/gcb.15099 https://hdl.handle.net/1959.7/uws:59878 eng eng U.K., Wiley-Blackwell Publishing Global Change Biology--1354-1013--1365-2486 Vol. 26 Issue. 7 No. pp: 4119-4133 © 2020 The Authors. Global Change Biology published by John Wiley & Sons Ltd. This is an open access article under the terms of the Creative Commons Attribution-NonCommercial License (https://creativecommons.org/licenses/by-nc/4.0/), which permits use, distribution and reproduction in any medium, provided the original work is properly cited and is not used for commercial purposes. CC-BY-NC XXXXXX - Unknown journal article 2020 ftunivwestsyd https://doi.org/10.1111/gcb.15099 2021-06-07T22:24:39Z The majority of northern peatlands were initiated during the Holocene. Owing to their mass imbalance, they have sequestered huge amounts of carbon in terrestrial ecosystems. Although recent syntheses have filled some knowledge gaps, the extent and remoteness of many peatlands pose challenges to developing reliable regional carbon accumulation estimates from observations. In this work, we employed an individual- and patch-based dynamic global vegetation model (LPJ-GUESS) with peatland and permafrost functionality to quantify long-term carbon accumulation rates in northern peatlands and to assess the effects of historical and projected future climate change on peatland carbon balance. We combined published datasets of peat basal age to form an up-to-date peat inception surface for the pan-Arctic region which we then used to constrain the model. We divided our analysis into two parts, with a focus both on the carbon accumulation changes detected within the observed peatland boundary and at pan-Arctic scale under two contrasting warming scenarios (representative concentration pathway—RCP8.5 and RCP2.6). We found that peatlands continue to act as carbon sinks under both warming scenarios, but their sink capacity will be substantially reduced under the high-warming (RCP8.5) scenario after 2050. Areas where peat production was initially hampered by permafrost and low productivity were found to accumulate more carbon because of the initial warming and moisture-rich environment due to permafrost thaw, higher precipitation and elevated CO2 levels. On the other hand, we project that areas which will experience reduced precipitation rates and those without permafrost will lose more carbon in the near future, particularly peatlands located in the European region and between 45 and 55°N latitude. Overall, we found that rapid global warming could reduce the carbon sink capacity of the northern peatlands in the coming decades. Article in Journal/Newspaper Arctic Climate change Global warming permafrost University of Western Sydney (UWS): Research Direct Arctic Global Change Biology 26 7 4119 4133 |
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XXXXXX - Unknown Chaudhary, Nitin Westermann, Sebastian Lamba, Shubhangi Shurpali, Narasinha J. Sannel, Anna B. Schurgers, Guy Miller, Paul A. Smith, Benjamin (R19508) Modelling past and future peatland carbon dynamics across the pan-Arctic |
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description |
The majority of northern peatlands were initiated during the Holocene. Owing to their mass imbalance, they have sequestered huge amounts of carbon in terrestrial ecosystems. Although recent syntheses have filled some knowledge gaps, the extent and remoteness of many peatlands pose challenges to developing reliable regional carbon accumulation estimates from observations. In this work, we employed an individual- and patch-based dynamic global vegetation model (LPJ-GUESS) with peatland and permafrost functionality to quantify long-term carbon accumulation rates in northern peatlands and to assess the effects of historical and projected future climate change on peatland carbon balance. We combined published datasets of peat basal age to form an up-to-date peat inception surface for the pan-Arctic region which we then used to constrain the model. We divided our analysis into two parts, with a focus both on the carbon accumulation changes detected within the observed peatland boundary and at pan-Arctic scale under two contrasting warming scenarios (representative concentration pathway—RCP8.5 and RCP2.6). We found that peatlands continue to act as carbon sinks under both warming scenarios, but their sink capacity will be substantially reduced under the high-warming (RCP8.5) scenario after 2050. Areas where peat production was initially hampered by permafrost and low productivity were found to accumulate more carbon because of the initial warming and moisture-rich environment due to permafrost thaw, higher precipitation and elevated CO2 levels. On the other hand, we project that areas which will experience reduced precipitation rates and those without permafrost will lose more carbon in the near future, particularly peatlands located in the European region and between 45 and 55°N latitude. Overall, we found that rapid global warming could reduce the carbon sink capacity of the northern peatlands in the coming decades. |
format |
Article in Journal/Newspaper |
author |
Chaudhary, Nitin Westermann, Sebastian Lamba, Shubhangi Shurpali, Narasinha J. Sannel, Anna B. Schurgers, Guy Miller, Paul A. Smith, Benjamin (R19508) |
author_facet |
Chaudhary, Nitin Westermann, Sebastian Lamba, Shubhangi Shurpali, Narasinha J. Sannel, Anna B. Schurgers, Guy Miller, Paul A. Smith, Benjamin (R19508) |
author_sort |
Chaudhary, Nitin |
title |
Modelling past and future peatland carbon dynamics across the pan-Arctic |
title_short |
Modelling past and future peatland carbon dynamics across the pan-Arctic |
title_full |
Modelling past and future peatland carbon dynamics across the pan-Arctic |
title_fullStr |
Modelling past and future peatland carbon dynamics across the pan-Arctic |
title_full_unstemmed |
Modelling past and future peatland carbon dynamics across the pan-Arctic |
title_sort |
modelling past and future peatland carbon dynamics across the pan-arctic |
publisher |
U.K., Wiley-Blackwell Publishing |
publishDate |
2020 |
url |
https://doi.org/10.1111/gcb.15099 https://hdl.handle.net/1959.7/uws:59878 |
geographic |
Arctic |
geographic_facet |
Arctic |
genre |
Arctic Climate change Global warming permafrost |
genre_facet |
Arctic Climate change Global warming permafrost |
op_relation |
Global Change Biology--1354-1013--1365-2486 Vol. 26 Issue. 7 No. pp: 4119-4133 |
op_rights |
© 2020 The Authors. Global Change Biology published by John Wiley & Sons Ltd. This is an open access article under the terms of the Creative Commons Attribution-NonCommercial License (https://creativecommons.org/licenses/by-nc/4.0/), which permits use, distribution and reproduction in any medium, provided the original work is properly cited and is not used for commercial purposes. |
op_rightsnorm |
CC-BY-NC |
op_doi |
https://doi.org/10.1111/gcb.15099 |
container_title |
Global Change Biology |
container_volume |
26 |
container_issue |
7 |
container_start_page |
4119 |
op_container_end_page |
4133 |
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1766327605695348736 |