Cargando…

Global methane emissions from rivers and streams

Methane (CH(4)) is a potent greenhouse gas and its concentrations have tripled in the atmosphere since the industrial revolution. There is evidence that global warming has increased CH(4) emissions from freshwater ecosystems(1,2), providing positive feedback to the global climate. Yet for rivers and...

Descripción completa

Detalles Bibliográficos
Autores principales: Rocher-Ros, Gerard, Stanley, Emily H., Loken, Luke C., Casson, Nora J., Raymond, Peter A., Liu, Shaoda, Amatulli, Giuseppe, Sponseller, Ryan A.
Formato: Online Artículo Texto
Lenguaje:English
Publicado: Nature Publishing Group UK 2023
Materias:
Acceso en línea:https://www.ncbi.nlm.nih.gov/pmc/articles/PMC10511311/
https://www.ncbi.nlm.nih.gov/pubmed/37587344
http://dx.doi.org/10.1038/s41586-023-06344-6
_version_ 1785108110496497664
author Rocher-Ros, Gerard
Stanley, Emily H.
Loken, Luke C.
Casson, Nora J.
Raymond, Peter A.
Liu, Shaoda
Amatulli, Giuseppe
Sponseller, Ryan A.
author_facet Rocher-Ros, Gerard
Stanley, Emily H.
Loken, Luke C.
Casson, Nora J.
Raymond, Peter A.
Liu, Shaoda
Amatulli, Giuseppe
Sponseller, Ryan A.
author_sort Rocher-Ros, Gerard
collection PubMed
description Methane (CH(4)) is a potent greenhouse gas and its concentrations have tripled in the atmosphere since the industrial revolution. There is evidence that global warming has increased CH(4) emissions from freshwater ecosystems(1,2), providing positive feedback to the global climate. Yet for rivers and streams, the controls and the magnitude of CH(4) emissions remain highly uncertain(3,4). Here we report a spatially explicit global estimate of CH(4) emissions from running waters, accounting for 27.9 (16.7–39.7) Tg CH(4) per year and roughly equal in magnitude to those of other freshwater systems(5,6). Riverine CH(4) emissions are not strongly temperature dependent, with low average activation energy (E(M) = 0.14 eV) compared with that of lakes and wetlands (E(M) = 0.96 eV)(1). By contrast, global patterns of emissions are characterized by large fluxes in high- and low-latitude settings as well as in human-dominated environments. These patterns are explained by edaphic and climate features that are linked to anoxia in and near fluvial habitats, including a high supply of organic matter and water saturation in hydrologically connected soils. Our results highlight the importance of land–water connections in regulating CH(4) supply to running waters, which is vulnerable not only to direct human modifications but also to several climate change responses on land.
format Online
Article
Text
id pubmed-10511311
institution National Center for Biotechnology Information
language English
publishDate 2023
publisher Nature Publishing Group UK
record_format MEDLINE/PubMed
spelling pubmed-105113112023-09-22 Global methane emissions from rivers and streams Rocher-Ros, Gerard Stanley, Emily H. Loken, Luke C. Casson, Nora J. Raymond, Peter A. Liu, Shaoda Amatulli, Giuseppe Sponseller, Ryan A. Nature Article Methane (CH(4)) is a potent greenhouse gas and its concentrations have tripled in the atmosphere since the industrial revolution. There is evidence that global warming has increased CH(4) emissions from freshwater ecosystems(1,2), providing positive feedback to the global climate. Yet for rivers and streams, the controls and the magnitude of CH(4) emissions remain highly uncertain(3,4). Here we report a spatially explicit global estimate of CH(4) emissions from running waters, accounting for 27.9 (16.7–39.7) Tg CH(4) per year and roughly equal in magnitude to those of other freshwater systems(5,6). Riverine CH(4) emissions are not strongly temperature dependent, with low average activation energy (E(M) = 0.14 eV) compared with that of lakes and wetlands (E(M) = 0.96 eV)(1). By contrast, global patterns of emissions are characterized by large fluxes in high- and low-latitude settings as well as in human-dominated environments. These patterns are explained by edaphic and climate features that are linked to anoxia in and near fluvial habitats, including a high supply of organic matter and water saturation in hydrologically connected soils. Our results highlight the importance of land–water connections in regulating CH(4) supply to running waters, which is vulnerable not only to direct human modifications but also to several climate change responses on land. Nature Publishing Group UK 2023-08-16 2023 /pmc/articles/PMC10511311/ /pubmed/37587344 http://dx.doi.org/10.1038/s41586-023-06344-6 Text en © The Author(s) 2023, corrected publication 2023 https://creativecommons.org/licenses/by/4.0/Open Access This article is licensed under a Creative Commons Attribution 4.0 International License, which permits use, sharing, adaptation, distribution and reproduction in any medium or format, as long as you give appropriate credit to the original author(s) and the source, provide a link to the Creative Commons licence, and indicate if changes were made. The images or other third party material in this article are included in the article’s Creative Commons licence, unless indicated otherwise in a credit line to the material. If material is not included in the article’s Creative Commons licence and your intended use is not permitted by statutory regulation or exceeds the permitted use, you will need to obtain permission directly from the copyright holder. To view a copy of this licence, visit http://creativecommons.org/licenses/by/4.0/ (https://creativecommons.org/licenses/by/4.0/) .
spellingShingle Article
Rocher-Ros, Gerard
Stanley, Emily H.
Loken, Luke C.
Casson, Nora J.
Raymond, Peter A.
Liu, Shaoda
Amatulli, Giuseppe
Sponseller, Ryan A.
Global methane emissions from rivers and streams
title Global methane emissions from rivers and streams
title_full Global methane emissions from rivers and streams
title_fullStr Global methane emissions from rivers and streams
title_full_unstemmed Global methane emissions from rivers and streams
title_short Global methane emissions from rivers and streams
title_sort global methane emissions from rivers and streams
topic Article
url https://www.ncbi.nlm.nih.gov/pmc/articles/PMC10511311/
https://www.ncbi.nlm.nih.gov/pubmed/37587344
http://dx.doi.org/10.1038/s41586-023-06344-6
work_keys_str_mv AT rocherrosgerard globalmethaneemissionsfromriversandstreams
AT stanleyemilyh globalmethaneemissionsfromriversandstreams
AT lokenlukec globalmethaneemissionsfromriversandstreams
AT cassonnoraj globalmethaneemissionsfromriversandstreams
AT raymondpetera globalmethaneemissionsfromriversandstreams
AT liushaoda globalmethaneemissionsfromriversandstreams
AT amatulligiuseppe globalmethaneemissionsfromriversandstreams
AT sponsellerryana globalmethaneemissionsfromriversandstreams