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 (CO 2 ), methane (CH 4 ), and nitrous oxide (N 2 O) 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 g...
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Online Access: | https://doi.org/10.5194/bg-21-335-2024 https://bg.copernicus.org/articles/21/335/2024/ |
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ftcopernicus:oai:publications.copernicus.org:bg110483 2024-02-11T10:01:10+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 2024-01-19 application/pdf https://doi.org/10.5194/bg-21-335-2024 https://bg.copernicus.org/articles/21/335/2024/ eng eng doi:10.5194/bg-21-335-2024 https://bg.copernicus.org/articles/21/335/2024/ eISSN: 1726-4189 Text 2024 ftcopernicus https://doi.org/10.5194/bg-21-335-2024 2024-01-22T17:24:14Z Arctic terrestrial greenhouse gas (GHG) fluxes of carbon dioxide (CO 2 ), methane (CH 4 ), and nitrous oxide (N 2 O) 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 <svg:svg xmlns:svg="http://www.w3.org/2000/svg" width="24pt" height="14pt" class="svg-formula" dspmath="mathimg" md5hash="a1fd226718b6fd2378e4d645ff1b8807"><svg:image xmlns:xlink="http://www.w3.org/1999/xlink" xlink:href="bg-21-335-2024-ie00001.svg" width="24pt" height="14pt" src="bg-21-335-2024-ie00001.png"/></svg:svg> ) ratio, soil dissolved organic carbon content, vascular plant biomass, and vegetation type from 101 plots scattered across a heterogeneous tundra landscape (5 km 2 ). 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 CO 2 uptake, it also revealed small but widespread CH 4 uptake in upland vegetation types, almost surpassing the high wetland CH 4 emissions at the landscape scale. Average N 2 O fluxes were negligible. CO 2 fluxes were controlled primarily by annual average soil temperature and biomass (both increase net sink) and vegetation type, CH 4 fluxes by soil moisture (increases net emissions) and vegetation type, and N 2 O fluxes by soil C / N <svg:svg xmlns:svg="http://www.w3.org/2000/svg" width="24pt" height="14pt" class="svg-formula" ... Text Arctic Tundra Copernicus Publications: E-Journals Arctic Biogeosciences 21 2 335 355 |
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Open Polar |
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Copernicus Publications: E-Journals |
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ftcopernicus |
language |
English |
description |
Arctic terrestrial greenhouse gas (GHG) fluxes of carbon dioxide (CO 2 ), methane (CH 4 ), and nitrous oxide (N 2 O) 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 <svg:svg xmlns:svg="http://www.w3.org/2000/svg" width="24pt" height="14pt" class="svg-formula" dspmath="mathimg" md5hash="a1fd226718b6fd2378e4d645ff1b8807"><svg:image xmlns:xlink="http://www.w3.org/1999/xlink" xlink:href="bg-21-335-2024-ie00001.svg" width="24pt" height="14pt" src="bg-21-335-2024-ie00001.png"/></svg:svg> ) ratio, soil dissolved organic carbon content, vascular plant biomass, and vegetation type from 101 plots scattered across a heterogeneous tundra landscape (5 km 2 ). 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 CO 2 uptake, it also revealed small but widespread CH 4 uptake in upland vegetation types, almost surpassing the high wetland CH 4 emissions at the landscape scale. Average N 2 O fluxes were negligible. CO 2 fluxes were controlled primarily by annual average soil temperature and biomass (both increase net sink) and vegetation type, CH 4 fluxes by soil moisture (increases net emissions) and vegetation type, and N 2 O fluxes by soil C / N <svg:svg xmlns:svg="http://www.w3.org/2000/svg" width="24pt" height="14pt" class="svg-formula" ... |
format |
Text |
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 |
spellingShingle |
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 |
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 |
publishDate |
2024 |
url |
https://doi.org/10.5194/bg-21-335-2024 https://bg.copernicus.org/articles/21/335/2024/ |
geographic |
Arctic |
geographic_facet |
Arctic |
genre |
Arctic Tundra |
genre_facet |
Arctic Tundra |
op_source |
eISSN: 1726-4189 |
op_relation |
doi:10.5194/bg-21-335-2024 https://bg.copernicus.org/articles/21/335/2024/ |
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 |
_version_ |
1790596918649290752 |