High-resolution spatial patterns and drivers of terrestrial ecosystem carbon dioxide, methane, and nitrous oxide fluxes in the tundra
Arctic terrestrial greenhouse gas (GHG) fluxes of carbon dioxide (CO2), methane (CH4), and nitrous oxide (N2O) play an important role in the global GHG budget. However, these GHG fluxes are rarely studied simultaneously, and our understanding of the conditions controlling them across spatial gradien...
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Copernicus Publications
2024
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ftnonlinearchiv:oai:noa.gwlb.de:cop_mods_00071164 2024-02-11T10:00:54+01:00 High-resolution spatial patterns and drivers of terrestrial ecosystem carbon dioxide, methane, and nitrous oxide fluxes in the tundra Virkkala, Anna-Maria Niittynen, Pekka Kemppinen, Julia Marushchak, Maija E. Voigt, Carolina Hensgens, Geert Kerttula, Johanna Happonen, Konsta Tyystjärvi, Vilna Biasi, Christina Hultman, Jenni Rinne, Janne Luoto, Miska 2024-01 electronic https://doi.org/10.5194/bg-21-335-2024 https://noa.gwlb.de/receive/cop_mods_00071164 https://noa.gwlb.de/servlets/MCRFileNodeServlet/cop_derivate_00069465/bg-21-335-2024.pdf https://bg.copernicus.org/articles/21/335/2024/bg-21-335-2024.pdf eng eng Copernicus Publications Biogeosciences -- http://www.bibliothek.uni-regensburg.de/ezeit/?2158181 -- http://www.copernicus.org/EGU/bg/bg.html -- 1726-4189 https://doi.org/10.5194/bg-21-335-2024 https://noa.gwlb.de/receive/cop_mods_00071164 https://noa.gwlb.de/servlets/MCRFileNodeServlet/cop_derivate_00069465/bg-21-335-2024.pdf https://bg.copernicus.org/articles/21/335/2024/bg-21-335-2024.pdf https://creativecommons.org/licenses/by/4.0/ uneingeschränkt info:eu-repo/semantics/openAccess article Verlagsveröffentlichung article Text doc-type:article 2024 ftnonlinearchiv https://doi.org/10.5194/bg-21-335-2024 2024-01-22T00:22:44Z Arctic terrestrial greenhouse gas (GHG) fluxes of carbon dioxide (CO2), methane (CH4), and nitrous oxide (N2O) play an important role in the global GHG budget. However, these GHG fluxes are rarely studied simultaneously, and our understanding of the conditions controlling them across spatial gradients is limited. Here, we explore the magnitudes and drivers of GHG fluxes across fine-scale terrestrial gradients during the peak growing season (July) in sub-Arctic Finland. We measured chamber-derived GHG fluxes and soil temperature, soil moisture, soil organic carbon and nitrogen stocks, soil pH, soil carbon-to-nitrogen ( C/N) ratio, soil dissolved organic carbon content, vascular plant biomass, and vegetation type from 101 plots scattered across a heterogeneous tundra landscape (5 km2). We used these field data together with high-resolution remote sensing data to develop machine learning models for predicting (i.e., upscaling) daytime GHG fluxes across the landscape at 2 m resolution. Our results show that this region was on average a daytime net GHG sink during the growing season. Although our results suggest that this sink was driven by CO2 uptake, it also revealed small but widespread CH4 uptake in upland vegetation types, almost surpassing the high wetland CH4 emissions at the landscape scale. Average N2O fluxes were negligible. CO2 fluxes were controlled primarily by annual average soil temperature and biomass (both increase net sink) and vegetation type, CH4 fluxes by soil moisture (increases net emissions) and vegetation type, and N2O fluxes by soil C/N (lower C/N increases net source). These results demonstrate the potential of high spatial resolution modeling of GHG fluxes in the Arctic. They also reveal the dominant role of CO2 fluxes across the tundra landscape but suggest that CH4 uptake in dry upland soils might play a significant role in the regional GHG budget. Article in Journal/Newspaper Arctic Tundra Niedersächsisches Online-Archiv NOA Arctic Biogeosciences 21 2 335 355 |
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Niedersächsisches Online-Archiv NOA |
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ftnonlinearchiv |
language |
English |
topic |
article Verlagsveröffentlichung |
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article Verlagsveröffentlichung Virkkala, Anna-Maria Niittynen, Pekka Kemppinen, Julia Marushchak, Maija E. Voigt, Carolina Hensgens, Geert Kerttula, Johanna Happonen, Konsta Tyystjärvi, Vilna Biasi, Christina Hultman, Jenni Rinne, Janne Luoto, Miska High-resolution spatial patterns and drivers of terrestrial ecosystem carbon dioxide, methane, and nitrous oxide fluxes in the tundra |
topic_facet |
article Verlagsveröffentlichung |
description |
Arctic terrestrial greenhouse gas (GHG) fluxes of carbon dioxide (CO2), methane (CH4), and nitrous oxide (N2O) play an important role in the global GHG budget. However, these GHG fluxes are rarely studied simultaneously, and our understanding of the conditions controlling them across spatial gradients is limited. Here, we explore the magnitudes and drivers of GHG fluxes across fine-scale terrestrial gradients during the peak growing season (July) in sub-Arctic Finland. We measured chamber-derived GHG fluxes and soil temperature, soil moisture, soil organic carbon and nitrogen stocks, soil pH, soil carbon-to-nitrogen ( C/N) ratio, soil dissolved organic carbon content, vascular plant biomass, and vegetation type from 101 plots scattered across a heterogeneous tundra landscape (5 km2). We used these field data together with high-resolution remote sensing data to develop machine learning models for predicting (i.e., upscaling) daytime GHG fluxes across the landscape at 2 m resolution. Our results show that this region was on average a daytime net GHG sink during the growing season. Although our results suggest that this sink was driven by CO2 uptake, it also revealed small but widespread CH4 uptake in upland vegetation types, almost surpassing the high wetland CH4 emissions at the landscape scale. Average N2O fluxes were negligible. CO2 fluxes were controlled primarily by annual average soil temperature and biomass (both increase net sink) and vegetation type, CH4 fluxes by soil moisture (increases net emissions) and vegetation type, and N2O fluxes by soil C/N (lower C/N increases net source). These results demonstrate the potential of high spatial resolution modeling of GHG fluxes in the Arctic. They also reveal the dominant role of CO2 fluxes across the tundra landscape but suggest that CH4 uptake in dry upland soils might play a significant role in the regional GHG budget. |
format |
Article in Journal/Newspaper |
author |
Virkkala, Anna-Maria Niittynen, Pekka Kemppinen, Julia Marushchak, Maija E. Voigt, Carolina Hensgens, Geert Kerttula, Johanna Happonen, Konsta Tyystjärvi, Vilna Biasi, Christina Hultman, Jenni Rinne, Janne Luoto, Miska |
author_facet |
Virkkala, Anna-Maria Niittynen, Pekka Kemppinen, Julia Marushchak, Maija E. Voigt, Carolina Hensgens, Geert Kerttula, Johanna Happonen, Konsta Tyystjärvi, Vilna Biasi, Christina Hultman, Jenni Rinne, Janne Luoto, Miska |
author_sort |
Virkkala, Anna-Maria |
title |
High-resolution spatial patterns and drivers of terrestrial ecosystem carbon dioxide, methane, and nitrous oxide fluxes in the tundra |
title_short |
High-resolution spatial patterns and drivers of terrestrial ecosystem carbon dioxide, methane, and nitrous oxide fluxes in the tundra |
title_full |
High-resolution spatial patterns and drivers of terrestrial ecosystem carbon dioxide, methane, and nitrous oxide fluxes in the tundra |
title_fullStr |
High-resolution spatial patterns and drivers of terrestrial ecosystem carbon dioxide, methane, and nitrous oxide fluxes in the tundra |
title_full_unstemmed |
High-resolution spatial patterns and drivers of terrestrial ecosystem carbon dioxide, methane, and nitrous oxide fluxes in the tundra |
title_sort |
high-resolution spatial patterns and drivers of terrestrial ecosystem carbon dioxide, methane, and nitrous oxide fluxes in the tundra |
publisher |
Copernicus Publications |
publishDate |
2024 |
url |
https://doi.org/10.5194/bg-21-335-2024 https://noa.gwlb.de/receive/cop_mods_00071164 https://noa.gwlb.de/servlets/MCRFileNodeServlet/cop_derivate_00069465/bg-21-335-2024.pdf https://bg.copernicus.org/articles/21/335/2024/bg-21-335-2024.pdf |
geographic |
Arctic |
geographic_facet |
Arctic |
genre |
Arctic Tundra |
genre_facet |
Arctic Tundra |
op_relation |
Biogeosciences -- http://www.bibliothek.uni-regensburg.de/ezeit/?2158181 -- http://www.copernicus.org/EGU/bg/bg.html -- 1726-4189 https://doi.org/10.5194/bg-21-335-2024 https://noa.gwlb.de/receive/cop_mods_00071164 https://noa.gwlb.de/servlets/MCRFileNodeServlet/cop_derivate_00069465/bg-21-335-2024.pdf https://bg.copernicus.org/articles/21/335/2024/bg-21-335-2024.pdf |
op_rights |
https://creativecommons.org/licenses/by/4.0/ uneingeschränkt info:eu-repo/semantics/openAccess |
op_doi |
https://doi.org/10.5194/bg-21-335-2024 |
container_title |
Biogeosciences |
container_volume |
21 |
container_issue |
2 |
container_start_page |
335 |
op_container_end_page |
355 |
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1790596622336393216 |