Global increase in methane production under future warming of lake bottom waters

Jansen, Joachim; Woolway, R. Iestyn; Kraemer, Benjamin M.; Albergel, Clément; Bastviken, David; Weyhenmeyer, Gesa A.; Marcé, Rafael; Sharma, Sapna; Sobek, Sebastian; Tranvik, Lars J.; Perroud, Marjorie; Gołub, Małgorzata; Moore, Tadhg; Vinnå, Love Råman; Fuente, Sofia La; Grant, Luke; Pierson, Don; Thiery, Wim; Jennings, Eleanor

doi:10.1111/gcb.16298

Cited by 41 publications

(33 citation statements)

References 110 publications

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“…Correspondingly, taxa known to catalyze the respective chemical reactions, i.e., SRB and ANME were also in shallower depth horizons (Supplementary Figures S6, S7). Temperature plays a major role for stimulating metabolic processes and methanogenesis derived methane emission is markedly increased with temperature (e.g., Yvon-Durocher et al, 2014;Jansen et al, 2022). Bottom water temperatures for October 2018 were higher (t = 13°C) than in March 2019 (t = 5°C; Supplementary Figure S1) and likewise were modeled sediment temperatures (Supplementary Figure S15), stimulating methane production.…”

Section: A Shallower Biological Sulfide and Methane Filter In October...mentioning

confidence: 99%

“…Also, POM composition appears to have changed in the years 2015 to 2019 (Supplementary Figure S2). In parallel, in the last decades bottom water temperatures have risen and oxygen concentrations declined (Lennartz et al, 2014), likely stimulating temperaturedependent methanogenesis (e.g., Yvon-Durocher et al, 2014;Jansen et al, 2022). Elevated methane production promotes higher SRR, which in fact appear to have increased since 2000 (Treude et al, 2005).…”

Section: S Tag Enrichments In Dnamentioning

confidence: 99%

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Environmental changes affect the microbial release of hydrogen sulfide and methane from sediments at Boknis Eck (SW Baltic Sea)

et al. 2022

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Anthropogenic activities are modifying the oceanic environment rapidly and are causing ocean warming and deoxygenation, affecting biodiversity, productivity, and biogeochemical cycling. In coastal sediments, anaerobic organic matter degradation essentially fuels the production of hydrogen sulfide and methane. The release of these compounds from sediments is detrimental for the (local) environment and entails socio-economic consequences. Therefore, it is vital to understand which microbes catalyze the re-oxidation of these compounds under environmental dynamics, thereby mitigating their release to the water column. Here we use the seasonally dynamic Boknis Eck study site (SW Baltic Sea), where bottom waters annually fall hypoxic or anoxic after the summer months, to extrapolate how the microbial community and its activity reflects rising temperatures and deoxygenation. During October 2018, hallmarked by warmer bottom water and following a hypoxic event, modeled sulfide and methane production and consumption rates are higher than in March at lower temperatures and under fully oxic bottom water conditions. The microbial populations catalyzing sulfide and methane metabolisms are found in shallower sediment zones in October 2018 than in March 2019. DNA-and RNA profiling of sediments indicate a shift from primarily organotrophic to (autotrophic) sulfide oxidizing Bacteria, respectively. Previous studies using data collected over decades demonstrate rising temperatures, decreasing eutrophication, lower primary production and thus less fresh organic matter transported to the Boknis Eck sediments. Elevated temperatures are known to stimulate methanogenesis, anaerobic oxidation of methane, sulfate reduction and essentially microbial sulfide consumption, likely explaining the shift to a phylogenetically more diverse sulfide oxidizing community based on RNA.

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Section: A Shallower Biological Sulfide and Methane Filter In October...mentioning

confidence: 99%

Section: S Tag Enrichments In Dnamentioning

confidence: 99%

Environmental changes affect the microbial release of hydrogen sulfide and methane from sediments at Boknis Eck (SW Baltic Sea)

et al. 2022

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“…(2022) in their global synthesis of methane production at lakes bottoms to local measurements of the temperature dependence at our study site using a q 10 function (Walz et al, 2017). Jansen et al (2022) provides an uncertainty range in their synthesis (grey shaded area) on top of the average value (grey line). Our local estimate (black line) falls within this uncertainty for the temperature range of pond sediments in our simulations. ]…”

Section: Recalculating Mean Water Depthsmentioning

confidence: 99%

Supplementary material to "Simulated methane emissions from Arctic ponds are highly sensitive to warming"

Rehder¹,

Kleinen²,

Kutzbach³

et al. 2023

Preprint

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In ponds, methane (CH 4 ) is produced in the anoxic bottom sediments when temperatures permit. If the pond is ice-free, this methane evades through three pathways: Diffusion, plant-mediated transport, and ebullition. To model these pathways and the distribution of produced methane between these pathways, we make the following main assumptions:1. Production and emissions are in equilibrium in each time step and, consequently, the methane concentrations in the water column are stationary. This means that the time-derivatives of the methane concentrations and fluxes are all zero in each time step.2. There is no lateral mixing of methane between the vegetated part and the open-water part of the pond in summer. Thus, methane transport in both parts of the pond can be treated separately.3. In summer, the whole water column is well mixed, and the methane concentration throughout the water column is constant.Following assumption 2, we can model the overgrown and the open-water part of the pond separately. Only for the overgrown fraction plant-mediated transport is considered. Methane in the sedimentMethane is produced in the sediment, and the production is dependent on the sediment temperature T b [K] and the base productivity P 0 [mol m −3 s −1 ]. P 0 is a tuning parameter and separately tuned for the overgrown and open-water parts of the ponds (Ström et al., 2003). We assume that most methane is produced at the top of the sediment (z = 0 m), and the productivity reduces exponentially further down the sediment (z > 0 m) (Stepanenko et al., 2011):

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“…To evaluate the impact of climate change on the lake water environment, numerous climate models have been coupled with one-dimensional hydrodynamical models at global and local scale (Golub et al, 2022). Previous studies have focused on the projected changes in lake water temperature (Shatwell et al, 2019;Ayala et al, 2020), lake heatwaves (Woolway et al, 2021a;Woolway et al, 2022), stratification phenology (Woolway et al, 2021b), loss of ice cover (Woolway et al, 2021c;Grant et al, 2021;Sharma et al, 2021), alterations in mixing regimes (Woolway and Merchant, 2019;Råman Vinnå et al, 2021), evaporation (Wang et al, 2018;Zhou et al, 2021;La Fuente et al, 2022), lake heat content (Weinberger and Vetter, 2014;Vanderkelen et al, 2020), methane production (Jansen et al, 2022) and water management strategies (Mi et al, 2020).…”

Section: Introductionmentioning

confidence: 99%

Climate change impacts on surface heat fluxes in a deep monomictic lake

Ayala¹,

Mesman²,

Jones³

et al. 2022

Preprint

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Turbulent and radiative energy exchanges between lakes and the atmosphere play an important role in determining the process of lake-mixing and stratification, including how lakes respond to climate and to climate change. Here we use a one-dimensional hydrodynamic lake model to assess seasonal impacts of climate change on individual surface heat flux components in Lough Feeagh, Ireland, a deep, monomictic lake. We drive the lake model with an ensemble of outputs from four climate models under three future greenhouse gas scenarios from 1976 to 2099. In these experiments, the results showed significant increases in the radiative budget that were largely counteracted by significant increases in the turbulent fluxes. The combined change in the individual surface heat fluxes led to a change in the total surface heat flux that was small, but sufficient to lead to significant changes in the volume-weighted average lake. The largest change in total surface heat fluxes were in spring and autumn. Both spring heating and autumnal cooling significantly decreased under future climate conditions, while changes to total surface heat fluxes in winter and summer were an order of magnitude lower. This leads to the counter-intuitive results that in a warming world there will be less heat, not more, entering Lough Feeagh during the springtime, and little change in net heating over the summer or winter compared to natural climate, so that increases in the volume-weighted average lake temperature are largely due to reduced heat loss during autumn.

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Global increase in methane production under future warming of lake bottom waters

Cited by 41 publications

References 110 publications

Environmental changes affect the microbial release of hydrogen sulfide and methane from sediments at Boknis Eck (SW Baltic Sea)

Environmental changes affect the microbial release of hydrogen sulfide and methane from sediments at Boknis Eck (SW Baltic Sea)

Supplementary material to "Simulated methane emissions from Arctic ponds are highly sensitive to warming"

Climate change impacts on surface heat fluxes in a deep monomictic lake

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