Carbon budget estimation of a subarctic catchment using adynamic ecosystem model at high spatial resolution
A large amount of organic carbon is stored in highlatitude soils. A substantial proportion of this carbon stock is vulnerable and may decompose rapidly due to temperature increases that are already greater than the global average. It is therefore crucial to quantify and understand carbon exchange be...
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ftneicon:oai:rour.neicon.ru:rour/277158 2023-05-15T15:01:56+02:00 Carbon budget estimation of a subarctic catchment using adynamic ecosystem model at high spatial resolution Tang, J. Persson, A. Olefeldt, D. Pilesjo, P. Heliasz, M. Jackowicz-Korczynski, Marcin Yang, Z. Smith, B. Callaghan, Terry V. Miller, P. A. Christensen, Torben R. Томский государственный университет Институт биологии, экологии, почвоведения, сельского и лесного хозяйства (Биологический институт) Кафедра ботаники 2015 application/pdf https://doi.org/10.5194/bg-12-2791-2015 https://openrepository.ru/article?id=277158 eng eng vtls:000528416 doi:10.5194/bg-12-2791-2015 https://openrepository.ru/article?id=277158 Biogeosciences. 2015. Vol. 12. P. 2791-2808 углерод Субарктика экосистемы статьи в журналах info:eu-repo/semantics/article 2015 ftneicon https://doi.org/10.5194/bg-12-2791-2015 2020-07-21T12:27:31Z A large amount of organic carbon is stored in highlatitude soils. A substantial proportion of this carbon stock is vulnerable and may decompose rapidly due to temperature increases that are already greater than the global average. It is therefore crucial to quantify and understand carbon exchange between the atmosphere and subarctic/arctic ecosystems. In this paper, we combine an Arctic-enabled version of the process-based dynamic ecosystem model, LPJGUESS (version LPJG-WHyMe-TFM) with comprehensive observations of terrestrial and aquatic carbon fluxes to simulate long-term carbon exchange in a subarctic catchment at 50m resolution. Integrating the observed carbon fluxes from aquatic systems with the modeled terrestrial carbon fluxes across the whole catchment, we estimate that the area is a carbon sink at present and will become an even stronger carbon sink by 2080, which is mainly a result of a projected densification of birch forest and its encroachment into tundra heath. However, the magnitudes of the modeled sinks are very dependent on future atmospheric CO2 concentrations. Furthermore, comparisons of global warming potentials between two simulations with and without CO2 increase since 1960 reveal that the increased methane emission from the peatland could double the warming effects of the whole catchment by 2080 in the absence of CO2 fertilization of the vegetation. This is the first process-based model study of the temporal evolution of a catchment-level carbon budget at high spatial resolution, including both terrestrial and aquatic carbon. Though this study also highlights some limitations in modeling subarctic ecosystem responses to climate change, such as aquatic system flux dynamics, nutrient limitation, herbivory and other disturbances, and peatland expansion, our study provides one process-based approach to resolve the complexity of carbon cycling in subarctic ecosystems while simultaneously pointing out the key model developments for capturing complex subarctic processes. Article in Journal/Newspaper Arctic Climate change Global warming Subarctic Tundra Субарктика NORA (National aggregator of open repositories of Russian universities) Arctic Biogeosciences 12 9 2791 2808 |
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NORA (National aggregator of open repositories of Russian universities) |
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language |
English |
topic |
углерод Субарктика экосистемы |
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углерод Субарктика экосистемы Tang, J. Persson, A. Olefeldt, D. Pilesjo, P. Heliasz, M. Jackowicz-Korczynski, Marcin Yang, Z. Smith, B. Callaghan, Terry V. Miller, P. A. Christensen, Torben R. Carbon budget estimation of a subarctic catchment using adynamic ecosystem model at high spatial resolution |
topic_facet |
углерод Субарктика экосистемы |
description |
A large amount of organic carbon is stored in highlatitude soils. A substantial proportion of this carbon stock is vulnerable and may decompose rapidly due to temperature increases that are already greater than the global average. It is therefore crucial to quantify and understand carbon exchange between the atmosphere and subarctic/arctic ecosystems. In this paper, we combine an Arctic-enabled version of the process-based dynamic ecosystem model, LPJGUESS (version LPJG-WHyMe-TFM) with comprehensive observations of terrestrial and aquatic carbon fluxes to simulate long-term carbon exchange in a subarctic catchment at 50m resolution. Integrating the observed carbon fluxes from aquatic systems with the modeled terrestrial carbon fluxes across the whole catchment, we estimate that the area is a carbon sink at present and will become an even stronger carbon sink by 2080, which is mainly a result of a projected densification of birch forest and its encroachment into tundra heath. However, the magnitudes of the modeled sinks are very dependent on future atmospheric CO2 concentrations. Furthermore, comparisons of global warming potentials between two simulations with and without CO2 increase since 1960 reveal that the increased methane emission from the peatland could double the warming effects of the whole catchment by 2080 in the absence of CO2 fertilization of the vegetation. This is the first process-based model study of the temporal evolution of a catchment-level carbon budget at high spatial resolution, including both terrestrial and aquatic carbon. Though this study also highlights some limitations in modeling subarctic ecosystem responses to climate change, such as aquatic system flux dynamics, nutrient limitation, herbivory and other disturbances, and peatland expansion, our study provides one process-based approach to resolve the complexity of carbon cycling in subarctic ecosystems while simultaneously pointing out the key model developments for capturing complex subarctic processes. |
author2 |
Томский государственный университет Институт биологии, экологии, почвоведения, сельского и лесного хозяйства (Биологический институт) Кафедра ботаники |
format |
Article in Journal/Newspaper |
author |
Tang, J. Persson, A. Olefeldt, D. Pilesjo, P. Heliasz, M. Jackowicz-Korczynski, Marcin Yang, Z. Smith, B. Callaghan, Terry V. Miller, P. A. Christensen, Torben R. |
author_facet |
Tang, J. Persson, A. Olefeldt, D. Pilesjo, P. Heliasz, M. Jackowicz-Korczynski, Marcin Yang, Z. Smith, B. Callaghan, Terry V. Miller, P. A. Christensen, Torben R. |
author_sort |
Tang, J. |
title |
Carbon budget estimation of a subarctic catchment using adynamic ecosystem model at high spatial resolution |
title_short |
Carbon budget estimation of a subarctic catchment using adynamic ecosystem model at high spatial resolution |
title_full |
Carbon budget estimation of a subarctic catchment using adynamic ecosystem model at high spatial resolution |
title_fullStr |
Carbon budget estimation of a subarctic catchment using adynamic ecosystem model at high spatial resolution |
title_full_unstemmed |
Carbon budget estimation of a subarctic catchment using adynamic ecosystem model at high spatial resolution |
title_sort |
carbon budget estimation of a subarctic catchment using adynamic ecosystem model at high spatial resolution |
publishDate |
2015 |
url |
https://doi.org/10.5194/bg-12-2791-2015 https://openrepository.ru/article?id=277158 |
geographic |
Arctic |
geographic_facet |
Arctic |
genre |
Arctic Climate change Global warming Subarctic Tundra Субарктика |
genre_facet |
Arctic Climate change Global warming Subarctic Tundra Субарктика |
op_source |
Biogeosciences. 2015. Vol. 12. P. 2791-2808 |
op_relation |
vtls:000528416 doi:10.5194/bg-12-2791-2015 https://openrepository.ru/article?id=277158 |
op_doi |
https://doi.org/10.5194/bg-12-2791-2015 |
container_title |
Biogeosciences |
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12 |
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9 |
container_start_page |
2791 |
op_container_end_page |
2808 |
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1766333943005577216 |