Peatland Heterogeneity Impacts on Regional Carbon Flux and its Radiative Effect within a Boreal Landscape
Peatlands, with high spatial variability in ecotypes and microforms, constitute a significant part of the boreal landscape and play an important role in the global carbon (C) cycle. However, the effects of this peatland heterogeneity within the boreal landscape are rarely quantified. Here, we use fi...
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ftzenodo:oai:zenodo.org:6941343 2024-09-15T18:15:44+00:00 Peatland Heterogeneity Impacts on Regional Carbon Flux and its Radiative Effect within a Boreal Landscape Kou, Dan Virtanen, Tarmo Treat, Claire C. Tuovinen, Juha-Pekka Räsänen, Aleksi Juutinen, Sari Mikola, Juha Aurela, Mika Heiskanen, Lauri Heikkilä, Maija Weckström, Jan Juselius, Teemu Piilo, Sanna R. Deng, Jia Zhang, Yu Chaudhary, Nitin Huang, Conghong Väliranta, Minna Biasi, Christina Liu, Xiangyu Guo, Mingyang Zhuang, Qianlai Korhola, Atte Shurpali, Narasinha J. 2022-09-30 https://doi.org/10.5281/zenodo.6941343 unknown Zenodo https://doi.org/10.5281/zenodo.6523951 https://doi.org/10.5281/zenodo.6941343 oai:zenodo.org:6941343 info:eu-repo/semantics/openAccess Creative Commons Attribution 4.0 International https://creativecommons.org/licenses/by/4.0/legalcode boreal landscape peatland heterogeneity carbon radiative effect info:eu-repo/semantics/article 2022 ftzenodo https://doi.org/10.5281/zenodo.694134310.5281/zenodo.6523951 2024-07-26T06:55:54Z Peatlands, with high spatial variability in ecotypes and microforms, constitute a significant part of the boreal landscape and play an important role in the global carbon (C) cycle. However, the effects of this peatland heterogeneity within the boreal landscape are rarely quantified. Here, we use field-based measurements, high-resolution land cover classification, and biogeochemical and atmospheric models to estimate the atmosphere-ecosystem C fluxes and corresponding radiative effect (RE) for a boreal landscape (Kaamanen) in northern Finland. Our result shows that the Kaamanen catchment currently functioned as a sink of carbon dioxide (CO 2 ) and a source of methane (CH 4 ). Peatlands (26% of the area) contributed 22% of the total CO 2 uptake and 89% of CH 4 emissions; forests (61%) accounted for 78% of CO 2 uptake and offset 6% of CH 4 emissions; water bodies (13%) offset 7% of CO 2 uptake and contributed 11% of CH 4 emissions. The heterogeneity of peatlands accounted for 11%, 88%, and 75% of the area-weighted variability (deviation from the area-weighted mean among different land cover types (LCTs) within the catchment) in CO 2 flux, CH 4 flux, and the combined RE of CO 2 and CH 4 exchanges over the 25-yr time horizon, respectively. Aggregating peatland LCTs or misclassifying them as non-peatland LCTs can significantly ( p < 0.05) bias the regional CH 4 exchange and RE estimates, while differentiating between drier non-inundated and wetter inundated peatlands can effectively reduce the bias. Current land cover products lack such details in peatland heterogeneity, which would be needed to better constrain boreal C budgets and global C-climate feedbacks. Article in Journal/Newspaper Kaamanen Northern Finland Zenodo |
institution |
Open Polar |
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op_collection_id |
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language |
unknown |
topic |
boreal landscape peatland heterogeneity carbon radiative effect |
spellingShingle |
boreal landscape peatland heterogeneity carbon radiative effect Kou, Dan Virtanen, Tarmo Treat, Claire C. Tuovinen, Juha-Pekka Räsänen, Aleksi Juutinen, Sari Mikola, Juha Aurela, Mika Heiskanen, Lauri Heikkilä, Maija Weckström, Jan Juselius, Teemu Piilo, Sanna R. Deng, Jia Zhang, Yu Chaudhary, Nitin Huang, Conghong Väliranta, Minna Biasi, Christina Liu, Xiangyu Guo, Mingyang Zhuang, Qianlai Korhola, Atte Shurpali, Narasinha J. Peatland Heterogeneity Impacts on Regional Carbon Flux and its Radiative Effect within a Boreal Landscape |
topic_facet |
boreal landscape peatland heterogeneity carbon radiative effect |
description |
Peatlands, with high spatial variability in ecotypes and microforms, constitute a significant part of the boreal landscape and play an important role in the global carbon (C) cycle. However, the effects of this peatland heterogeneity within the boreal landscape are rarely quantified. Here, we use field-based measurements, high-resolution land cover classification, and biogeochemical and atmospheric models to estimate the atmosphere-ecosystem C fluxes and corresponding radiative effect (RE) for a boreal landscape (Kaamanen) in northern Finland. Our result shows that the Kaamanen catchment currently functioned as a sink of carbon dioxide (CO 2 ) and a source of methane (CH 4 ). Peatlands (26% of the area) contributed 22% of the total CO 2 uptake and 89% of CH 4 emissions; forests (61%) accounted for 78% of CO 2 uptake and offset 6% of CH 4 emissions; water bodies (13%) offset 7% of CO 2 uptake and contributed 11% of CH 4 emissions. The heterogeneity of peatlands accounted for 11%, 88%, and 75% of the area-weighted variability (deviation from the area-weighted mean among different land cover types (LCTs) within the catchment) in CO 2 flux, CH 4 flux, and the combined RE of CO 2 and CH 4 exchanges over the 25-yr time horizon, respectively. Aggregating peatland LCTs or misclassifying them as non-peatland LCTs can significantly ( p < 0.05) bias the regional CH 4 exchange and RE estimates, while differentiating between drier non-inundated and wetter inundated peatlands can effectively reduce the bias. Current land cover products lack such details in peatland heterogeneity, which would be needed to better constrain boreal C budgets and global C-climate feedbacks. |
format |
Article in Journal/Newspaper |
author |
Kou, Dan Virtanen, Tarmo Treat, Claire C. Tuovinen, Juha-Pekka Räsänen, Aleksi Juutinen, Sari Mikola, Juha Aurela, Mika Heiskanen, Lauri Heikkilä, Maija Weckström, Jan Juselius, Teemu Piilo, Sanna R. Deng, Jia Zhang, Yu Chaudhary, Nitin Huang, Conghong Väliranta, Minna Biasi, Christina Liu, Xiangyu Guo, Mingyang Zhuang, Qianlai Korhola, Atte Shurpali, Narasinha J. |
author_facet |
Kou, Dan Virtanen, Tarmo Treat, Claire C. Tuovinen, Juha-Pekka Räsänen, Aleksi Juutinen, Sari Mikola, Juha Aurela, Mika Heiskanen, Lauri Heikkilä, Maija Weckström, Jan Juselius, Teemu Piilo, Sanna R. Deng, Jia Zhang, Yu Chaudhary, Nitin Huang, Conghong Väliranta, Minna Biasi, Christina Liu, Xiangyu Guo, Mingyang Zhuang, Qianlai Korhola, Atte Shurpali, Narasinha J. |
author_sort |
Kou, Dan |
title |
Peatland Heterogeneity Impacts on Regional Carbon Flux and its Radiative Effect within a Boreal Landscape |
title_short |
Peatland Heterogeneity Impacts on Regional Carbon Flux and its Radiative Effect within a Boreal Landscape |
title_full |
Peatland Heterogeneity Impacts on Regional Carbon Flux and its Radiative Effect within a Boreal Landscape |
title_fullStr |
Peatland Heterogeneity Impacts on Regional Carbon Flux and its Radiative Effect within a Boreal Landscape |
title_full_unstemmed |
Peatland Heterogeneity Impacts on Regional Carbon Flux and its Radiative Effect within a Boreal Landscape |
title_sort |
peatland heterogeneity impacts on regional carbon flux and its radiative effect within a boreal landscape |
publisher |
Zenodo |
publishDate |
2022 |
url |
https://doi.org/10.5281/zenodo.6941343 |
genre |
Kaamanen Northern Finland |
genre_facet |
Kaamanen Northern Finland |
op_relation |
https://doi.org/10.5281/zenodo.6523951 https://doi.org/10.5281/zenodo.6941343 oai:zenodo.org:6941343 |
op_rights |
info:eu-repo/semantics/openAccess Creative Commons Attribution 4.0 International https://creativecommons.org/licenses/by/4.0/legalcode |
op_doi |
https://doi.org/10.5281/zenodo.694134310.5281/zenodo.6523951 |
_version_ |
1810453679310897152 |