Long-term summer warming reduces post-fire carbon dioxide losses in an arctic heath tundra
The frequency and extent of wildfires in the Arctic has been increasing due to climate change. However, there is a lack of understanding about long-term impacts of climate warming on post-fire carbon dioxide (CO 2 ) exchange in arctic tundra ecosystems. To investigate this, we conducted an experimen...
Published in: | Agricultural and Forest Meteorology |
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Language: | English |
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2024
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Online Access: | https://curis.ku.dk/portal/da/publications/longterm-summer-warming-reduces-postfire-carbon-dioxide-losses-in-an-arctic-heath-tundra(499d899c-f4af-4386-bb9c-9bca64f39112).html https://doi.org/10.1016/j.agrformet.2023.109823 https://curis.ku.dk/ws/files/380699043/Long_term_summer_warming_reduces_post_fire_carbon_dioxide_losses_in_an_arctic_heath_tundra.pdf |
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ftcopenhagenunip:oai:pure.atira.dk:publications/499d899c-f4af-4386-bb9c-9bca64f39112 2024-06-09T07:42:21+00:00 Long-term summer warming reduces post-fire carbon dioxide losses in an arctic heath tundra Xu, Wenyi Elberling, Bo Ambus, Per Lennart 2024 application/pdf https://curis.ku.dk/portal/da/publications/longterm-summer-warming-reduces-postfire-carbon-dioxide-losses-in-an-arctic-heath-tundra(499d899c-f4af-4386-bb9c-9bca64f39112).html https://doi.org/10.1016/j.agrformet.2023.109823 https://curis.ku.dk/ws/files/380699043/Long_term_summer_warming_reduces_post_fire_carbon_dioxide_losses_in_an_arctic_heath_tundra.pdf eng eng info:eu-repo/semantics/openAccess Xu , W , Elberling , B & Ambus , P L 2024 , ' Long-term summer warming reduces post-fire carbon dioxide losses in an arctic heath tundra ' , Agricultural and Forest Meteorology , vol. 344 , 109823 . https://doi.org/10.1016/j.agrformet.2023.109823 Ecosystem respiration Greenland Gross ecosystem production Net ecosystem exchange Soil heating Vegetation recovery article 2024 ftcopenhagenunip https://doi.org/10.1016/j.agrformet.2023.109823 2024-05-16T11:29:31Z The frequency and extent of wildfires in the Arctic has been increasing due to climate change. However, there is a lack of understanding about long-term impacts of climate warming on post-fire carbon dioxide (CO 2 ) exchange in arctic tundra ecosystems. To investigate this, we conducted an experimental low-intensity fire in combination with summer warming (using open top chambers) in a dry heath tundra ecosystem in West Greenland. We report here on the impact four and five years after the fire. We also examined immediate effects of soil heating to three temperature levels (35, 55 and 80 °C), as a simulation of heat transfer during a typical tundra fire. Fire increased soil organic phosphorus concentrations up to at least four years after the burning. The burned areas remained a net CO 2 source five years after the fire, mainly due to the lower aboveground vegetation biomass and reduced gross ecosystem production (GEP). However, with four to five years of summer warming, the GEP, ecosystem respiration and soil respiration significantly increased, and burned areas turned into a net CO 2 sink. Ex-situ soil heating to the temperature of 55 °C, reaching the heat load comparable with in-situ burning, had minor effects on soil GHG fluxes. This suggests that soil GHG activities are not immediately affected by heat transfer and associated soil temperature increases during a typical low-intensity wildfire in arctic dry tundra. Overall, our results reveal that in a future warmer climate, vegetation is likely to recover more quickly from fires, resulting in a reduction in post-fire CO 2 losses. Article in Journal/Newspaper Arctic Arctic Climate change Greenland Tundra University of Copenhagen: Research Arctic Greenland Agricultural and Forest Meteorology 344 109823 |
institution |
Open Polar |
collection |
University of Copenhagen: Research |
op_collection_id |
ftcopenhagenunip |
language |
English |
topic |
Ecosystem respiration Greenland Gross ecosystem production Net ecosystem exchange Soil heating Vegetation recovery |
spellingShingle |
Ecosystem respiration Greenland Gross ecosystem production Net ecosystem exchange Soil heating Vegetation recovery Xu, Wenyi Elberling, Bo Ambus, Per Lennart Long-term summer warming reduces post-fire carbon dioxide losses in an arctic heath tundra |
topic_facet |
Ecosystem respiration Greenland Gross ecosystem production Net ecosystem exchange Soil heating Vegetation recovery |
description |
The frequency and extent of wildfires in the Arctic has been increasing due to climate change. However, there is a lack of understanding about long-term impacts of climate warming on post-fire carbon dioxide (CO 2 ) exchange in arctic tundra ecosystems. To investigate this, we conducted an experimental low-intensity fire in combination with summer warming (using open top chambers) in a dry heath tundra ecosystem in West Greenland. We report here on the impact four and five years after the fire. We also examined immediate effects of soil heating to three temperature levels (35, 55 and 80 °C), as a simulation of heat transfer during a typical tundra fire. Fire increased soil organic phosphorus concentrations up to at least four years after the burning. The burned areas remained a net CO 2 source five years after the fire, mainly due to the lower aboveground vegetation biomass and reduced gross ecosystem production (GEP). However, with four to five years of summer warming, the GEP, ecosystem respiration and soil respiration significantly increased, and burned areas turned into a net CO 2 sink. Ex-situ soil heating to the temperature of 55 °C, reaching the heat load comparable with in-situ burning, had minor effects on soil GHG fluxes. This suggests that soil GHG activities are not immediately affected by heat transfer and associated soil temperature increases during a typical low-intensity wildfire in arctic dry tundra. Overall, our results reveal that in a future warmer climate, vegetation is likely to recover more quickly from fires, resulting in a reduction in post-fire CO 2 losses. |
format |
Article in Journal/Newspaper |
author |
Xu, Wenyi Elberling, Bo Ambus, Per Lennart |
author_facet |
Xu, Wenyi Elberling, Bo Ambus, Per Lennart |
author_sort |
Xu, Wenyi |
title |
Long-term summer warming reduces post-fire carbon dioxide losses in an arctic heath tundra |
title_short |
Long-term summer warming reduces post-fire carbon dioxide losses in an arctic heath tundra |
title_full |
Long-term summer warming reduces post-fire carbon dioxide losses in an arctic heath tundra |
title_fullStr |
Long-term summer warming reduces post-fire carbon dioxide losses in an arctic heath tundra |
title_full_unstemmed |
Long-term summer warming reduces post-fire carbon dioxide losses in an arctic heath tundra |
title_sort |
long-term summer warming reduces post-fire carbon dioxide losses in an arctic heath tundra |
publishDate |
2024 |
url |
https://curis.ku.dk/portal/da/publications/longterm-summer-warming-reduces-postfire-carbon-dioxide-losses-in-an-arctic-heath-tundra(499d899c-f4af-4386-bb9c-9bca64f39112).html https://doi.org/10.1016/j.agrformet.2023.109823 https://curis.ku.dk/ws/files/380699043/Long_term_summer_warming_reduces_post_fire_carbon_dioxide_losses_in_an_arctic_heath_tundra.pdf |
geographic |
Arctic Greenland |
geographic_facet |
Arctic Greenland |
genre |
Arctic Arctic Climate change Greenland Tundra |
genre_facet |
Arctic Arctic Climate change Greenland Tundra |
op_source |
Xu , W , Elberling , B & Ambus , P L 2024 , ' Long-term summer warming reduces post-fire carbon dioxide losses in an arctic heath tundra ' , Agricultural and Forest Meteorology , vol. 344 , 109823 . https://doi.org/10.1016/j.agrformet.2023.109823 |
op_rights |
info:eu-repo/semantics/openAccess |
op_doi |
https://doi.org/10.1016/j.agrformet.2023.109823 |
container_title |
Agricultural and Forest Meteorology |
container_volume |
344 |
container_start_page |
109823 |
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1801371256882200576 |