El CRAI romandrà tancat del 24 de desembre de 2025 al 6 de gener de 2026. La validació de documents es reprendrà a partir del 7 de gener de 2026.
El CRAI permanecerá cerrado del 24 de diciembre de 2025 al 6 de enero de 2026. La validación de documentos se reanudará a partir del 7 de enero de 2026.
From 2025-12-24 to 2026-01-06, the CRAI remain closed and the documents will be validated from 2026-01-07.
 
Miniatura

Fitxers

903570.pdf (4.17 MB)

Embargament

Document embargat fins el 2025-12-31

Tipus de document

Article

Versió

Versió publicada

Data de publicació

2025-07-01

Tots els drets reservats

Si us plau utilitzeu sempre aquest identificador per citar o enllaçar aquest document: https://hdl.handle.net/2445/224431

Increased Ecosystem Productivity Boosts Methane Production in Arctic Lake Sediments

Títol de la revista

Autors

Director/Tutor

ISSN de la revista

Títol del volum

Recurs relacionat

https://doi.org/10.1029/2024JG008508

Resum

Global estimates of methane (CH4) emissions from lakes to the atmosphere rely on understanding CH4 processes at the sediment‐water interface (SWI). However, in the Arctic, the variability, magnitude, and environmental drivers of CH4 production and flux across the SWI are poorly understood. Here, we estimate CH4 diffusive fluxes from the sediment into the water column in 10 lakes in Arctic Scandinavia and Svalbard using porewater modeling and mass transfer estimates, which we then compare with 60 published estimates from the Arctic to the tropics. Diffusion of CH4 in the sampled lake sediments ranged from -0.46 to 3.1 mmol m-2 day-1, which is consistent with previous reports for Arctic and boreal lakes, and lower than for temperate and tropical biomes. Methane production occurs primarily within the top ∼10 cm of sediment, indicating a biogenic origin. Random forest predictive modeling of the sampled lakes revealed that condition promoting production and deposition of autochthonous organic carbon in Arctic lakes drive CH4 diffusion into the water column by fueling sediment CH4 production. For small lakes across biomes, determinants of the estimated CH4 flux were also best captured by climate predictors, with warmer and wetter conditions favoring ecosystem productivity and enhancing flux but also lake morphometry resulting in important regional variability in estimates. Our study emphasizes the importance of quantifying diffusive CH4 fluxes from sediments in diverse lake types to account for differences in the controls on primary production and the preservation of organic carbon across and within different biomes, to refine CH4 emission estimates in a

warming climate.

Matèries

Biogeoquímica, Metà, Llacs, Ecologia dels llacs, Canvi climàtic, Sediments lacustres

Matèries (anglès)

Biogeochemistry, Methane, Lakes, Lake ecology, Climatic change, Lake sediments

Citació

Col·leccions

Articles publicats en revistes (Dinàmica de la Terra i l'Oceà)

Citació

BULÍNOVÁ, M., ROUILLARD, A., SCHOMACKER, A., KJELLMAN, S.e., GUDASZ, C., OLID GARCIA, Carolina, RYDBERG, J., PANIERI, G., HODSON, A., VAN DER BILT, W.g.m., RØTHE, T.o., BINDLER, R.. Increased Ecosystem Productivity Boosts Methane Production in Arctic Lake Sediments. _Journal of Geophysical Research: Biogeosciences_. 2025. Vol. 130, núm. 7. [consulta: 26 de desembre de 2025]. ISSN: 2169-8953. [Disponible a: https://hdl.handle.net/2445/224431]

Exportar metadades

JSON - METS

Compartir registre