Winter methane fluxes over boreal and Arctic environments
Unprecedented warming of Arctic–boreal regions (ABR) has poorly understood consequences on carbon cycle processes. Uncertainties in annual methane (CH4) budgets partly arise because of limited data availability during winter. In this study, winter CH4 flux measurements were conducted using the snowp...
Main Authors: | , , , , , |
---|---|
Format: | Other/Unknown Material |
Language: | unknown |
Published: |
Authorea, Inc.
2024
|
Subjects: | |
Online Access: | http://dx.doi.org/10.22541/essoar.170542245.58670859/v1 |
id |
crwinnower:10.22541/essoar.170542245.58670859/v1 |
---|---|
record_format |
openpolar |
spelling |
crwinnower:10.22541/essoar.170542245.58670859/v1 2024-06-02T08:01:26+00:00 Winter methane fluxes over boreal and Arctic environments Mavrovic, Alex Sonnentag, Oliver Lemmetyinen, Juha Voigt, Carolina Aurela, Mika Roy, Alexandre 2024 http://dx.doi.org/10.22541/essoar.170542245.58670859/v1 unknown Authorea, Inc. posted-content 2024 crwinnower https://doi.org/10.22541/essoar.170542245.58670859/v1 2024-05-07T14:19:28Z Unprecedented warming of Arctic–boreal regions (ABR) has poorly understood consequences on carbon cycle processes. Uncertainties in annual methane (CH4) budgets partly arise because of limited data availability during winter. In this study, winter CH4 flux measurements were conducted using the snowpack diffusion gradient method over five ABR ecosystem types in Canada and Finland: closed–crown and open–crown coniferous boreal forest, boreal wetland and erect–shrub and prostrate–shrub tundra. Boreal forest uplands acted as net CH4 sinks, while the boreal wetland acted as net CH4 source during winter. We identified several wetland tundra CH4 emission hotspots and large spatial variability in boreal wetland CH4 emissions. In the boreal forest uplands, soil liquid water content was identified as an important environmental control of winter CH4 fluxes. Our results indicate non–negligible winter CH4 flux, which must be accounted for in annual carbon balance and terrestrial biosphere models over ABR. Other/Unknown Material Arctic Tundra The Winnower Arctic Canada |
institution |
Open Polar |
collection |
The Winnower |
op_collection_id |
crwinnower |
language |
unknown |
description |
Unprecedented warming of Arctic–boreal regions (ABR) has poorly understood consequences on carbon cycle processes. Uncertainties in annual methane (CH4) budgets partly arise because of limited data availability during winter. In this study, winter CH4 flux measurements were conducted using the snowpack diffusion gradient method over five ABR ecosystem types in Canada and Finland: closed–crown and open–crown coniferous boreal forest, boreal wetland and erect–shrub and prostrate–shrub tundra. Boreal forest uplands acted as net CH4 sinks, while the boreal wetland acted as net CH4 source during winter. We identified several wetland tundra CH4 emission hotspots and large spatial variability in boreal wetland CH4 emissions. In the boreal forest uplands, soil liquid water content was identified as an important environmental control of winter CH4 fluxes. Our results indicate non–negligible winter CH4 flux, which must be accounted for in annual carbon balance and terrestrial biosphere models over ABR. |
format |
Other/Unknown Material |
author |
Mavrovic, Alex Sonnentag, Oliver Lemmetyinen, Juha Voigt, Carolina Aurela, Mika Roy, Alexandre |
spellingShingle |
Mavrovic, Alex Sonnentag, Oliver Lemmetyinen, Juha Voigt, Carolina Aurela, Mika Roy, Alexandre Winter methane fluxes over boreal and Arctic environments |
author_facet |
Mavrovic, Alex Sonnentag, Oliver Lemmetyinen, Juha Voigt, Carolina Aurela, Mika Roy, Alexandre |
author_sort |
Mavrovic, Alex |
title |
Winter methane fluxes over boreal and Arctic environments |
title_short |
Winter methane fluxes over boreal and Arctic environments |
title_full |
Winter methane fluxes over boreal and Arctic environments |
title_fullStr |
Winter methane fluxes over boreal and Arctic environments |
title_full_unstemmed |
Winter methane fluxes over boreal and Arctic environments |
title_sort |
winter methane fluxes over boreal and arctic environments |
publisher |
Authorea, Inc. |
publishDate |
2024 |
url |
http://dx.doi.org/10.22541/essoar.170542245.58670859/v1 |
geographic |
Arctic Canada |
geographic_facet |
Arctic Canada |
genre |
Arctic Tundra |
genre_facet |
Arctic Tundra |
op_doi |
https://doi.org/10.22541/essoar.170542245.58670859/v1 |
_version_ |
1800745808207806464 |