Nongrowing season methane emissions–a significant component of annual emissions across northern ecosystems
Abstract Wetlands are the single largest natural source of atmospheric methane (CH 4 ), a greenhouse gas, and occur extensively in the northern hemisphere. Large discrepancies remain between “bottom‐up” and “top‐down” estimates of northern CH 4 emissions. To explore whether these discrepancies are d...
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Online Access: | http://dx.doi.org/10.1111/gcb.14137 https://api.wiley.com/onlinelibrary/tdm/v1/articles/10.1111%2Fgcb.14137 https://onlinelibrary.wiley.com/doi/pdf/10.1111/gcb.14137 https://onlinelibrary.wiley.com/doi/full-xml/10.1111/gcb.14137 https://onlinelibrary.wiley.com/doi/am-pdf/10.1111/gcb.14137 |
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crwiley:10.1111/gcb.14137 2024-06-23T07:56:09+00:00 Nongrowing season methane emissions–a significant component of annual emissions across northern ecosystems Treat, Claire C. Bloom, A. Anthony Marushchak, Maija E. Biotieteiden ja Ympäristön Tutkimuksen Toimikunta Division of Arctic Sciences Jet Propulsion Laboratory Erzincan Üniversitesi National Science Foundation National Aeronautics and Space Administration 2018 http://dx.doi.org/10.1111/gcb.14137 https://api.wiley.com/onlinelibrary/tdm/v1/articles/10.1111%2Fgcb.14137 https://onlinelibrary.wiley.com/doi/pdf/10.1111/gcb.14137 https://onlinelibrary.wiley.com/doi/full-xml/10.1111/gcb.14137 https://onlinelibrary.wiley.com/doi/am-pdf/10.1111/gcb.14137 en eng Wiley http://onlinelibrary.wiley.com/termsAndConditions#am http://onlinelibrary.wiley.com/termsAndConditions#vor Global Change Biology volume 24, issue 8, page 3331-3343 ISSN 1354-1013 1365-2486 journal-article 2018 crwiley https://doi.org/10.1111/gcb.14137 2024-06-13T04:24:10Z Abstract Wetlands are the single largest natural source of atmospheric methane (CH 4 ), a greenhouse gas, and occur extensively in the northern hemisphere. Large discrepancies remain between “bottom‐up” and “top‐down” estimates of northern CH 4 emissions. To explore whether these discrepancies are due to poor representation of nongrowing season CH 4 emissions, we synthesized nongrowing season and annual CH 4 flux measurements from temperate, boreal, and tundra wetlands and uplands. Median nongrowing season wetland emissions ranged from 0.9 g/m 2 in bogs to 5.2 g/m 2 in marshes and were dependent on moisture, vegetation, and permafrost. Annual wetland emissions ranged from 0.9 g m −2 year −1 in tundra bogs to 78 g m −2 year −1 in temperate marshes. Uplands varied from CH 4 sinks to CH 4 sources with a median annual flux of 0.0 ± 0.2 g m −2 year −1 . The measured fraction of annual CH 4 emissions during the nongrowing season (observed: 13% to 47%) was significantly larger than that was predicted by two process‐based model ensembles, especially between 40° and 60°N (modeled: 4% to 17%). Constraining the model ensembles with the measured nongrowing fraction increased total nongrowing season and annual CH 4 emissions. Using this constraint, the modeled nongrowing season wetland CH 4 flux from >40° north was 6.1 ± 1.5 Tg/year, three times greater than the nongrowing season emissions of the unconstrained model ensemble. The annual wetland CH 4 flux was 37 ± 7 Tg/year from the data‐constrained model ensemble, 25% larger than the unconstrained ensemble. Considering nongrowing season processes is critical for accurately estimating CH 4 emissions from high‐latitude ecosystems, and necessary for constraining the role of wetland emissions in a warming climate. Article in Journal/Newspaper permafrost Tundra Wiley Online Library Global Change Biology 24 8 3331 3343 |
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Wiley Online Library |
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English |
description |
Abstract Wetlands are the single largest natural source of atmospheric methane (CH 4 ), a greenhouse gas, and occur extensively in the northern hemisphere. Large discrepancies remain between “bottom‐up” and “top‐down” estimates of northern CH 4 emissions. To explore whether these discrepancies are due to poor representation of nongrowing season CH 4 emissions, we synthesized nongrowing season and annual CH 4 flux measurements from temperate, boreal, and tundra wetlands and uplands. Median nongrowing season wetland emissions ranged from 0.9 g/m 2 in bogs to 5.2 g/m 2 in marshes and were dependent on moisture, vegetation, and permafrost. Annual wetland emissions ranged from 0.9 g m −2 year −1 in tundra bogs to 78 g m −2 year −1 in temperate marshes. Uplands varied from CH 4 sinks to CH 4 sources with a median annual flux of 0.0 ± 0.2 g m −2 year −1 . The measured fraction of annual CH 4 emissions during the nongrowing season (observed: 13% to 47%) was significantly larger than that was predicted by two process‐based model ensembles, especially between 40° and 60°N (modeled: 4% to 17%). Constraining the model ensembles with the measured nongrowing fraction increased total nongrowing season and annual CH 4 emissions. Using this constraint, the modeled nongrowing season wetland CH 4 flux from >40° north was 6.1 ± 1.5 Tg/year, three times greater than the nongrowing season emissions of the unconstrained model ensemble. The annual wetland CH 4 flux was 37 ± 7 Tg/year from the data‐constrained model ensemble, 25% larger than the unconstrained ensemble. Considering nongrowing season processes is critical for accurately estimating CH 4 emissions from high‐latitude ecosystems, and necessary for constraining the role of wetland emissions in a warming climate. |
author2 |
Biotieteiden ja Ympäristön Tutkimuksen Toimikunta Division of Arctic Sciences Jet Propulsion Laboratory Erzincan Üniversitesi National Science Foundation National Aeronautics and Space Administration |
format |
Article in Journal/Newspaper |
author |
Treat, Claire C. Bloom, A. Anthony Marushchak, Maija E. |
spellingShingle |
Treat, Claire C. Bloom, A. Anthony Marushchak, Maija E. Nongrowing season methane emissions–a significant component of annual emissions across northern ecosystems |
author_facet |
Treat, Claire C. Bloom, A. Anthony Marushchak, Maija E. |
author_sort |
Treat, Claire C. |
title |
Nongrowing season methane emissions–a significant component of annual emissions across northern ecosystems |
title_short |
Nongrowing season methane emissions–a significant component of annual emissions across northern ecosystems |
title_full |
Nongrowing season methane emissions–a significant component of annual emissions across northern ecosystems |
title_fullStr |
Nongrowing season methane emissions–a significant component of annual emissions across northern ecosystems |
title_full_unstemmed |
Nongrowing season methane emissions–a significant component of annual emissions across northern ecosystems |
title_sort |
nongrowing season methane emissions–a significant component of annual emissions across northern ecosystems |
publisher |
Wiley |
publishDate |
2018 |
url |
http://dx.doi.org/10.1111/gcb.14137 https://api.wiley.com/onlinelibrary/tdm/v1/articles/10.1111%2Fgcb.14137 https://onlinelibrary.wiley.com/doi/pdf/10.1111/gcb.14137 https://onlinelibrary.wiley.com/doi/full-xml/10.1111/gcb.14137 https://onlinelibrary.wiley.com/doi/am-pdf/10.1111/gcb.14137 |
genre |
permafrost Tundra |
genre_facet |
permafrost Tundra |
op_source |
Global Change Biology volume 24, issue 8, page 3331-3343 ISSN 1354-1013 1365-2486 |
op_rights |
http://onlinelibrary.wiley.com/termsAndConditions#am http://onlinelibrary.wiley.com/termsAndConditions#vor |
op_doi |
https://doi.org/10.1111/gcb.14137 |
container_title |
Global Change Biology |
container_volume |
24 |
container_issue |
8 |
container_start_page |
3331 |
op_container_end_page |
3343 |
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1802649053551394816 |