Carbon and nitrogen-based gas fluxes in subarctic ecosystems under climate warming and increased cloudiness
Climate warming is projected to be particularly pronounced in the northern high latitudes coupled with reduced light availability due to increased cloudiness. The changing climate may alter the fluxes of greenhouse gases (GHGs) and atmospherically reactive trace gases, which can drive important clim...
Published in: | Environmental Science: Atmospheres |
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Format: | Article in Journal/Newspaper |
Language: | English |
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2024
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Online Access: | https://curis.ku.dk/portal/da/publications/carbon-and-nitrogenbased-gas-fluxes-in-subarctic-ecosystems-under-climate-warming-and-increased-cloudiness(d614bd8a-9b74-403d-b95d-07b9159ee412).html https://doi.org/10.1039/d4ea00017j https://curis.ku.dk/ws/files/402485794/d4ea00017j.pdf |
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ftcopenhagenunip:oai:pure.atira.dk:publications/d614bd8a-9b74-403d-b95d-07b9159ee412 2024-09-15T18:29:07+00:00 Carbon and nitrogen-based gas fluxes in subarctic ecosystems under climate warming and increased cloudiness Ndah, Flobert A. Maljanen, Marja Rinnan, Riikka Bhattarai, Hem Raj Davie-Martin, Cleo L. Mikkonen, Santtu Michelsen, Anders Kivimäenpää, Minna 2024 application/pdf https://curis.ku.dk/portal/da/publications/carbon-and-nitrogenbased-gas-fluxes-in-subarctic-ecosystems-under-climate-warming-and-increased-cloudiness(d614bd8a-9b74-403d-b95d-07b9159ee412).html https://doi.org/10.1039/d4ea00017j https://curis.ku.dk/ws/files/402485794/d4ea00017j.pdf eng eng info:eu-repo/semantics/openAccess Ndah , F A , Maljanen , M , Rinnan , R , Bhattarai , H R , Davie-Martin , C L , Mikkonen , S , Michelsen , A & Kivimäenpää , M 2024 , ' Carbon and nitrogen-based gas fluxes in subarctic ecosystems under climate warming and increased cloudiness ' , Environmental Science: Atmospheres , vol. 4 , no. 8 , pp. 942-957 . https://doi.org/10.1039/d4ea00017j article 2024 ftcopenhagenunip https://doi.org/10.1039/d4ea00017j 2024-09-02T14:28:57Z Climate warming is projected to be particularly pronounced in the northern high latitudes coupled with reduced light availability due to increased cloudiness. The changing climate may alter the fluxes of greenhouse gases (GHGs) and atmospherically reactive trace gases, which can drive important climate feedbacks. We investigated the individual and combined effects of warming and increased cloudiness on methane (CH4), carbon dioxide (CO2), nitrous oxide (N2O), nitric oxide (NO), nitrous acid (HONO) and biogenic volatile organic compound (BVOC) fluxes in mesocosms from two tundra and one palsa mire ecosystems kept under strict environmental control in climate chambers. We also examined whether and how prevailing soil physiochemical properties and plant species composition affected the fluxes. In control conditions, all sites were net sinks of CH4 and CO2 during both growing seasons except for the palsa site which was a net source of CO2 in the second growing season. Warming enhanced CH4 uptake, mostly observed in the palsa site, and turned the palsa site from a sink to a source of CO2 in the first growing season and increased the CO2 source strength in the second growing season. Warming increased BVOC emissions while increased cloudiness mostly decreased the emissions. The combined treatment of warming and increased cloudiness decreased CH4 uptake, mostly observed in the palsa site, and BVOC emissions. Fluxes of CO2 were linked to availability of soil carbon and organic matter, litter input, soil pH and bulk density, and cover of mosses. Low emissions of N2O, NO, and HONO could mainly be explained by limited availability of mineral nitrogen. Warming-enhanced CH4 uptake and BVOC emissions will provide a negative feedback to climate while enhanced CO2 release from palsa mires will exacerbate global warming. Under combined warming and increased cloudiness, subarctic ecosystems may shift from sinks to sources of CH4, providing a positive feedback to climate. Prevailing soil physiochemical properties and vegetation ... Article in Journal/Newspaper palsa Subarctic Tundra University of Copenhagen: Research Environmental Science: Atmospheres 4 8 942 957 |
institution |
Open Polar |
collection |
University of Copenhagen: Research |
op_collection_id |
ftcopenhagenunip |
language |
English |
description |
Climate warming is projected to be particularly pronounced in the northern high latitudes coupled with reduced light availability due to increased cloudiness. The changing climate may alter the fluxes of greenhouse gases (GHGs) and atmospherically reactive trace gases, which can drive important climate feedbacks. We investigated the individual and combined effects of warming and increased cloudiness on methane (CH4), carbon dioxide (CO2), nitrous oxide (N2O), nitric oxide (NO), nitrous acid (HONO) and biogenic volatile organic compound (BVOC) fluxes in mesocosms from two tundra and one palsa mire ecosystems kept under strict environmental control in climate chambers. We also examined whether and how prevailing soil physiochemical properties and plant species composition affected the fluxes. In control conditions, all sites were net sinks of CH4 and CO2 during both growing seasons except for the palsa site which was a net source of CO2 in the second growing season. Warming enhanced CH4 uptake, mostly observed in the palsa site, and turned the palsa site from a sink to a source of CO2 in the first growing season and increased the CO2 source strength in the second growing season. Warming increased BVOC emissions while increased cloudiness mostly decreased the emissions. The combined treatment of warming and increased cloudiness decreased CH4 uptake, mostly observed in the palsa site, and BVOC emissions. Fluxes of CO2 were linked to availability of soil carbon and organic matter, litter input, soil pH and bulk density, and cover of mosses. Low emissions of N2O, NO, and HONO could mainly be explained by limited availability of mineral nitrogen. Warming-enhanced CH4 uptake and BVOC emissions will provide a negative feedback to climate while enhanced CO2 release from palsa mires will exacerbate global warming. Under combined warming and increased cloudiness, subarctic ecosystems may shift from sinks to sources of CH4, providing a positive feedback to climate. Prevailing soil physiochemical properties and vegetation ... |
format |
Article in Journal/Newspaper |
author |
Ndah, Flobert A. Maljanen, Marja Rinnan, Riikka Bhattarai, Hem Raj Davie-Martin, Cleo L. Mikkonen, Santtu Michelsen, Anders Kivimäenpää, Minna |
spellingShingle |
Ndah, Flobert A. Maljanen, Marja Rinnan, Riikka Bhattarai, Hem Raj Davie-Martin, Cleo L. Mikkonen, Santtu Michelsen, Anders Kivimäenpää, Minna Carbon and nitrogen-based gas fluxes in subarctic ecosystems under climate warming and increased cloudiness |
author_facet |
Ndah, Flobert A. Maljanen, Marja Rinnan, Riikka Bhattarai, Hem Raj Davie-Martin, Cleo L. Mikkonen, Santtu Michelsen, Anders Kivimäenpää, Minna |
author_sort |
Ndah, Flobert A. |
title |
Carbon and nitrogen-based gas fluxes in subarctic ecosystems under climate warming and increased cloudiness |
title_short |
Carbon and nitrogen-based gas fluxes in subarctic ecosystems under climate warming and increased cloudiness |
title_full |
Carbon and nitrogen-based gas fluxes in subarctic ecosystems under climate warming and increased cloudiness |
title_fullStr |
Carbon and nitrogen-based gas fluxes in subarctic ecosystems under climate warming and increased cloudiness |
title_full_unstemmed |
Carbon and nitrogen-based gas fluxes in subarctic ecosystems under climate warming and increased cloudiness |
title_sort |
carbon and nitrogen-based gas fluxes in subarctic ecosystems under climate warming and increased cloudiness |
publishDate |
2024 |
url |
https://curis.ku.dk/portal/da/publications/carbon-and-nitrogenbased-gas-fluxes-in-subarctic-ecosystems-under-climate-warming-and-increased-cloudiness(d614bd8a-9b74-403d-b95d-07b9159ee412).html https://doi.org/10.1039/d4ea00017j https://curis.ku.dk/ws/files/402485794/d4ea00017j.pdf |
genre |
palsa Subarctic Tundra |
genre_facet |
palsa Subarctic Tundra |
op_source |
Ndah , F A , Maljanen , M , Rinnan , R , Bhattarai , H R , Davie-Martin , C L , Mikkonen , S , Michelsen , A & Kivimäenpää , M 2024 , ' Carbon and nitrogen-based gas fluxes in subarctic ecosystems under climate warming and increased cloudiness ' , Environmental Science: Atmospheres , vol. 4 , no. 8 , pp. 942-957 . https://doi.org/10.1039/d4ea00017j |
op_rights |
info:eu-repo/semantics/openAccess |
op_doi |
https://doi.org/10.1039/d4ea00017j |
container_title |
Environmental Science: Atmospheres |
container_volume |
4 |
container_issue |
8 |
container_start_page |
942 |
op_container_end_page |
957 |
_version_ |
1810470522113228800 |