Aug 2026· Geophysical Research Letters· Vol 53· 0 citations· 55 references
Abstract
Lakes are globally important sources of atmospheric methane (CH4), yet a process‐based understanding of their emissions and drivers at regional scales remains limited. Here we developed and applied a one‐dimensional lake model to 42,948 natural lakes across the contiguous United States (CONUS). Simulations indicate that ebullition is the dominant emission pathway, contributing ∼70% of total fluxes, particularly in shallow, eutrophic systems. Shallow benthic zones act as emission hotspots, accounting for ∼85% of lake CH4 emissions. CONUS lakes oxidize ∼65% of produced CH4 on average, with oxidation efficiencies ranging from 46% in shallow lakes to 92% in deeper systems. Scenario analyses demonstrate that warming and nutrient enrichment jointly drive strong, nonlinear increases in lake CH4 emissions by preferentially enhancing ebullition. Our results indicate that nutrient management offers a practical and effective pathway to mitigate future lake CH4 release and weaken anthropogenic climate feedbacks.
Climate warming is expected to increase methane (CH
4
) emissions from coastal wetlands, but its effects on the temporal dynamics of emissions remain poorly resolved. Because short‐lived high‐emission events are poorly captured by low‐frequency monitoring and by existing models, warming‐driven increases in variab...
Abigail S. L. Lewis, R. Rich, G. Noyce· Journal of Geophysical Resea...· 0 citations
Ponds are disproportionately large contributors to global carbon cycling, with substantial but variable emissions of methane (CH4) to the atmosphere relative to their global surface area. Efforts to upscale pond CH4 emissions have focused on broad‐scale correlates of emissions, yet mechanisms underlying the variability...
J. Rabaey, Pascal Bodmer, Abigail Bar et al.· Limnology and Oceanography L...· 0 citations
Tropical wetlands are widely considered the largest natural source of atmospheric methane (CH4)1, 2, 3–4. However, uncertainties about wetland extent and CH4 production have led to large variations in modelled CH4 emission trends2,3. Most historical reconstructions rely on data from polar ice cores, which cannot fully...
Kara A. Lamantia, L. Thompson, M. Davis et al.· Nature· 0 citations
Inland water CO2 emissions are a critical component of the global carbon cycle, yet their magnitude and long‐term response to climate change remain poorly constrained, primarily because of uncertainties in the air–water CO2 concentration gradient. This knowledge gap is particularly pronounced on the Tibetan Plateau, wh...
Julia Iwan, Li-Shan Ran, R. Lauerwald et al.· Global Biogeochemical Cycles· 0 citations
Peatlands are a major natural source of atmospheric methane (CH4). Yet their responses to warming remain highly uncertain, because ecosystem‐level understanding of warming effects on CH4 production and oxidation is limited. Here, we conducted an open‐top chamber (OTC) warming experiment in the world's largest alpine pe...
Cheng-Zhu Liu, Guohua Dai, Zong-Guang Liu et al.· Global Change Biology· 0 citations
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