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626 results for “Methanation”
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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Species-level termite methane production rates
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Great Plains grassland methane dynamics
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Data from: Morphological constraints on plant-mediated methane release and oxidation under experimental warming in a peatland and meadow on the Qinghai-Tibetan Plateau
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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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Biogeochemical and physical controls on methane fluxes from two ferruginous meromictic lakes
Data was collected at Brownie Lake in Minneapolis, MN, USA and at Canyon Lake in the Upper Peninsula of MI, USA. The methane flux, or the amount of methane entering the atmosphere over a given area per time, was assessed at Brownie Lake and Canyon Lake. Sampling of Brownie Lake during geochemical characterization revealed that the methane flux out of the lake was much higher than Canyon Lake, as well as other ferruginous meromictic lakes used as geochemical analogs for early Earth’s ferruginous oceans. The dataset here was used to discern why the methane flux out of Brownie Lake was high. Brownie Lake was sampled in May, July and September of 2017 and June 2018. Canyon Lake was sampled in June and September 2017 and May 2018. We used various limnological probes and sensors (LDO sensor, Hydrolab multiprobe) to collect water column profiles (temperature, dissolved oxygen, specific conductance, chlorophyll a, pH). We also analyzed water samples (cations, anions, CH4, DIC) using ion chromatography and ICP-MS and measured isotopes (CH4, DIC) utilizing isotope ratio mass spectrometry. The methane flux was constrained in two ways: taking direct samples from the surface of each lake using floating static flux chambers, which were measured by gas chromatography, and estimated from geochemical reaction-transport modeling based on the diffusional profiles of methane and other dissolved species throughout the water column.
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.
Methane consumption as influenced by nitrogen fertilization and tillage at the Kellogg Biological Station, Hickory Corners, MI (2001 to 2002)
Dataset Abstract This dataset contains data from Pongthep Suwanwaree’s dissertation entitled: Methane Oxidation in Terrestrial Ecosystem’s: Patterns and Effects of Disturbance, submitted to Michigan State University, Department of Crop and Soil Science, 2003. original data source http://lter.kbs.msu.edu/datasets/49
FIGURE 3 in Enigmaticolus inflatus sp. nov., a new buccinid species from a methane seep area in the South China Sea (Gastropoda: Neogastropoda)
FIGURE 3. Neighbour-joining tree for Enigmaticolus and related genera based on available COI sequences from this study and Gen- Bank. Numbers above branches indicate the bootstrap values. (MN102347 is the GenBank accession number for the COI sequence of Enigmaticolus inflatus sp. nov.)
FIGURE 1 in Enigmaticolus inflatus sp. nov., a new buccinid species from a methane seep area in the South China Sea (Gastropoda: Neogastropoda)
FIGURE 1. Enigmaticolus inflatus sp. nov. A–C. holotype MBM 286512, 79.2 mm; D. paratype MBM 286513, 83.3 mm; E. Radula of holotype.
Output Files of the 1-D Submodule in "The Photochemistry of Methane and Ethane in the Martian Atmosphere"
<p>netCDF output files and the python scripts (.ipynb) used to create the plots and work in the AGU submission "The Photochemistry of Methane and Ethane in the Martian Atmosphere".</p> <p>file_usage.txt matches the files to the relevant figures and plotting scripts.</p>
Neutron powder diffraction data of solid methane in the range 8K-90K
<p>Raw and processed neutron powder diffraction data from solid methane in the range 8K-90K in 2K steps. Data were collected on the Wombat high-intensity powder neutron diffractometer. This data accompanies a submitted publication.</p>
Pulse labelling of deep soil layers in forest with 13CH4: testing a new method for tracing methane in the upper horizons, understorey vegetation and tree stems using laserbased spectrometry
<p>Methane is one the main greenhouse gases and upland forests are one of its main biological sinks. However, vegetation could reduce this sink by allowing a direct path for the methane produced in deep soils to escape into the atmosphere. By tracing emissions with <sup>13</sup>CH<sub>4</sub>, we show for the first time that methane emitted by trees in upland forest could have a deep soil origin even though the soil is an overall methane sink. However, we found that the trees and understorey vegetation at our site had only a small impact on the methane budget.</p>
Global soil methane uptake inferred from global field measurements
<p>Soil methane (CH<sub>4</sub>) uptake is an important sink in the global methane budget. However, both the magnitude and the dynamics of global soil CH<sub>4</sub> uptake remain highly uncertain. Here, by compiling an extensive data set of 6899 site-months of soil CH<sub>4</sub> fluxes observed at 682 sites, we use a machine-learning algorithm (Random Forest) to provide a data-driven estimate of global soil CH<sub>4</sub> uptake each month from 1981 to 2018. Varying the combination of predictors, we construct 9 different simulations for three landcover types (Forests, Grasslands, Croplands). The dataset uploaded is the mean of 9 simulations after calculating the area-weighted average of CH<sub>4 </sub>flux of three landcover types.</p>
Data for Automated Mechanism Generation Using Linear Scaling Relationships and Sensitivity Analyses applied to Catalytic Partial Oxidation of Methane
<p>Data, scripts, and plots for the preprint and article titled '<i>Automated Mechanism Generation Using Linear Scaling Relationships and Sensitivity Analyses applied to Catalytic Partial Oxidation of Methane</i>'</p>
Dataset for the manuscript of the "Experimental investigation into simultaneous adsorption of water vapor and methane onto shales"
<p>Dataset for the manuscript of the "Experimental investigation into simultaneous adsorption of water vapor and methane onto shales"<br> </p>
FIGURE 14 in Laminatubus (Serpulidae, Annelida) from eastern Pacific hydrothermal vents and methane seeps, with description of two new species
FIGURE 14. SEM of Laminatubus joycebrooksae n. sp. (SIO-BIC A8256A). A—lateral view of a specimen without radiolar crown. B—close-up view of the thorax. C—collar chaetae. D—thoracic chaetae of the last thoracic chaetigerous segment. E—thoracic uncini. F—anterior abdominal true trumpet-shaped chaeta. G—anterior abdominal uncini.
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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)
ABODe is a University of Edinburgh DataShare dataset for behavior classification in group-housed mice using home-cage video, identities, bounding boxes, ground-plate positions, and annotator labels.
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.