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140 results for “Methane emissions”
Gridded posterior methane emissions
<p>The publication <a href="https://doi.org/10.5194/acp-22-15351-2022">Estimating Emissions of Methane Consistent with Atmospheric Measurements of Methane and δ¹³C of Methane</a> reports methane emissions inferred from a joint assimilation of atmospheric CH₄ and δ¹³CH₄ measurements. The inversion problem is under-constrained, and therefore inversely estimated fluxes should not be interpreted at the spatiotemporal resolution of the inversion. However, for visualization and modeling purposes, it is often convenient to have gridded flux estimates that, while not direct outputs from the inversion, satisfy multiple regional constraints from the inversion. This 1º×1º flux product is such a construction. At annual, continental scales, the total methane emissions per source type are identical to those from the CH₄ + δ¹³CH₄ inversion in the publication. The monthly, sub-continental patterns are dictated by the prior (inventory) emission estimates used in the publication.</p>
Particulate organic carbon sedimentation triggers lagged methane emissions in a eutrophic reservoir
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Data from: Controlled irrigation suppresses methane emissions by reshaping the rhizosphere microbiomes in rice
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Global methane and nitrous oxide emissions from inland waters and estuaries
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Fencing farm dams to exclude livestock halves methane emissions and improves water quality
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Seasonal landfill methane emissions driven by temperature and pressure
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Stem methane emissions and wood methane production
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Data from: Methane emissions from abandoned oil and gas wells in Colorado
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Quantifying the effects sizes of common controls on methane emissions from an ombrotrophic peat bog
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Quantifying methane emissions from Laurentian Great Lakes estuaries using in situ measurements, remote sensing and machine learning
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Data from: Drivers of intra-individual spatial variability in methane emissions from tree trunks in upland forest
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Fencing the flux: Seasonal trends, environmental drivers, and mitigation opportunities of methane emissions from farm dams
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Model code for reconstructing biomass burning emissions from ice core records of acetylene, ethane, and methane
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Post-extraction restored peatland methane production and emission
Peatland degradation due to human activities is contributing to rising atmospheric CO2 levels. Restoring the carbon (C) sink function in degraded peatlands and preventing further stored C losses is a key climate mitigation strategy, given the global scale of peatland disturbance. Active restoration at a post-extraction peatland in Canada has been shown to successfully re-establish net CO2 uptake rates similar to undisturbed peatlands within a decade or two. However, lower than expected CH4 emissions suggest recovery of belowground C cycling processes may lag behind recovery of the surface net flux. Using closed chamber measurements over a warm season, we determined that restored Sphagnum, which covers two thirds of the site, was a net zero source of CH4. Emissions from the restored site were primarily attributed to vascular plant substrate inputs, measured as acetate, and plant-mediated transport. The carbon isotopic fractionation factor for CH4 and CO2 in the restored former peat field pore water exhibited α < 1.060 even deeper in the cutover peat profile (0.8 m depth), evidence of a dominance in acetoclastic methane production. In contrast, isotopic fractionation in the former drainage ditches showed a balance of acetoclastic and hydrogenotrophic methanogenesis deeper in the profile, indicative of some bulk peat C turnover. This study shows that the legacy of substrate quality in the cutover peat in reducing CH4 production and thus emission, can aid in reducing the climate warming impact of newly restored peatlands.
Data from: Impact of native and non-native aquatic plants on methane emission and phytoplankton growth
Freshwater plants affect the ecosystem functioning of shallow aquatic ecosystems. However, because native plants are threatened by environmental change such as eutrophication, global warming and biological invasions, continued ecosystem functioning may be at risk. In this study, we explored how the growth of native and non-native plant species in eutrophic, warm conditions impacts two plant ecosystem functions: regulation of phytoplankton growth and methane emission. We expected that plants would inhibit phytoplankton growth, while for methane emission both inhibition and stimulation are possible. We conducted an outdoor experiment using monocultures of four native and four non-native freshwater plant species planted at three different densities, as well as a no-plant control. Monocultures of each species were planted in 65 L mesocosms and after three weeks of acclimatisation each mesocosm was inoculated with phytoplankton. Subsequently, we added nutrients twice a week for eight weeks, before harvesting the plant biomass. During these eight weeks, we measured chlorophyll-a concentration thirteen times and the diffusive methane emissions once after four weeks. The mesocosms amplified the temperature of a warm summer so that plants were exposed to higher-than-average temperatures. We found that five plant species lost biomass, two species increased their biomass only at the highest initial plant density (native Myriophyllum spicatum and non-native Lagarosiphon major) and a single species increased its biomass at all densities (on average 14 times its initial mass; amphibious non-native Myriophyllum aquaticum). Overall, the mean biomass change of non-natives was positive, whereas that of natives was negative. This difference in biomass change between native and non-native plants did not relate to overall differences in phytoplankton mass or diffusive methane emissions. In mesocosms where submerged plant species gained biomass, chlorophyll-a concentration was lower than in the no-plant control and mesocosms with biomass loss. Diffusive methane emissions were highest in mesocosms where plants lost considerable biomass, likely because it increased substrate availability for methanogenesis. However, mesocosms where plant biomass increased had emissions similar to the no-plant control, hence we found no inhibitory effects of plant presence on diffusive methane emission. We conclude that plant growth in eutrophic, warm conditions varies strongly with plant identity. Our results furthermore suggest that plant identity determines whether the replacement of native by non-native freshwater plants will alter ecosystem functions such as regulation of phytoplankton growth and methane emission.
Retrieval of dominant methane (CH4) emission sources, the first high resolution (1-2m) dataset of storage tanks of China in 2000-2021
<p>We presented a storage tank inventory of 92 typical cities with high volatile organic compounds, in response to the Three-Year Action Plan for Winning the Blue Sky Defense War, proposed by the State Council of China. It comprises of 14461 storage tanks, which are extracted based on high spatail resolution images of GaoFen-1, GaoFen-2, GaoFen-6, and Ziyuan satellites in year of 2021. It is the first inventory covering detailed distribution locations and boundaries of storage tanks. The inventory we aim to share provides a basic distribution of storage tanks in different sizes and will contribute to support environmentally friendly regulations proposal for more effective pollution control and energy resource management.</p>
Systematic review for optimizing sample size in dairy cow methane emission studies: a comprehensive methodological approach
<p>Collection of research data focusing on methane (CH4) emissions from dairy cows across various breeds and conditions. The dataset encompasses a range of studies published from 2012 to 2023, each documented with specific parameters including the study title, authors, country of research, cow breed, lactation status, methods used for CH4 measurement, experimental designs, CH4 yield and its variability, dry matter intake, and diet composition.</p>
Eutrophication and deoxygenation drive high methane emissions from a brackish coastal system
<p>Data presented in the article "<span>Eutrophication and deoxygenation drive high methane emissions from a brackish coastal system </span>".</p>
China's gridded fugitive energy methane emissions over 2011-2020
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Peat macropore networks – new insights into episodic and hotspot methane emission
<p>The data and scripts are related to the manuscript "Peat macropore networks – new insights into episodic and hotspot methane emission" by Petri Kiuru, Marjo Palviainen, Tiia Grönholm, Maarit Raivonen, Lukas Kohl, Vincent Gauci, Iñaki Urzainki, and Annamari (Ari) Laurén submitted to Biogeosciences.</p>
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These curated guides explain access requirements, typical timelines, costs, and reuse considerations for widely used research datasets.
Allen Brain Atlas
Allen Brain Atlas is an Allen Institute collection of brain map atlases, datasets, APIs, and analysis tools covering mouse, human, and non-human primate brain resources.
Annotated Behaviour and Observability Dataset (ABODe)
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DANDI Archive for NWB datasets
DANDI is a BRAIN Initiative archive for publishing and sharing neurophysiology data, including electrophysiology, optophysiology, and behavioral data packaged as NWB and related standards.
International Brain Laboratory public data
The International Brain Laboratory public data releases expose standardized mouse decision-making experiments, including Neuropixels recordings, widefield calcium imaging, behavior, and session metadata accessed through the ONE API.
OpenNeuro
OpenNeuro is a free, open platform for sharing neuroimaging datasets, with public search, dataset pages, and download paths for web, S3, DataLad, and the OpenNeuro CLI.