Atmospheric methane
Ideas and perspectives: is shale gas a major driver of recent increase in global atmospheric methane?
... Abstract. Methane has been rising rapidly in the atmosphere over the past decade, contributing to global climate ...in atmospheric methane was accompanied by an enrichment in the heav- ier carbon ...
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Disentangling Spatiotemporal Signals in Global Atmospheric Methane Columns
... in atmospheric methane (CH 4 ), a potent radiative forcing agent and major driver of tropospheric oxidant budgets, is critical for understanding future impacts on the climate ...are atmospheric ...
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The MIS 11 – MIS 1 analogy, southern European vegetation, atmospheric methane and the “early anthropogenic hypothesis”
... and atmospheric methane concentrations in previ- ous interglacials is used to evaluate the natural ...Holocene methane emissions and as- sess the two alignment ...between methane ...
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Strategy for high-accuracy-and-precision retrieval of atmospheric methane from the mid-infrared FTIR network
... priori methane volume mixing ratio profile (taken from the WACCM ...of methane, a method for harmonized calculation of column-averaged dry-air mole fractions (XCH 4 ) at all sites has been set ...
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Satellite observation of atmospheric methane: intercomparison between AIRS and GOSAT TANSO-FTS retrievals
... The atmospheric temperature profiles, water vapor profiles, surface temperatures and sur- face emissivity are required as inputs to compute the radi- ances in the CH 4 absorption ...
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Limited impact of El Niño–Southern Oscillation on variability and growth rate of atmospheric methane
... in the global average) is likely, due to a variety of factors that may lead to lags of unknown length and some of which may be cumulative, e.g., hydrology, plant growth and decay, microbial response, and seasonal ...
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Consumption of atmospheric methane by the Qinghai–Tibet Plateau alpine steppe ecosystem
... Figure 3. Annual patterns of diel methane (CH 4 ) flux and precipitation variations from 2012 to 2016. Positive values indicate CH 4 release and negative values indicate CH 4 uptake by ecosystems. Red dots and ...
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Continuous-flow isotope ratio mass spectrometry method for carbon and hydrogen isotope measurements on atmospheric methane
... online methane analysis system: methane from the sample air stored in the sample loop is isolated from other air components by subsequent preconcentration, cryofocussing and gas chromatographic ...separated ...
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High-resolution glacial and deglacial record of atmospheric methane by continuous-flow and laser spectrometer analysis along the NEEM ice core
... firm a 25 ppbv peak culminating at 74.1 ka b2k, already sug- gested in the GISP2 (Grachev et al., 2009) and GRIP (Flück- iger et al., 2004) discrete data sets. This takes place at the transition between GIS20 and GS19, ...
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Drivers of atmospheric methane uptake by montane forest soils in the southern Peruvian Andes
... Kiese et al., 2008; Purbopuspito et al., 2006; Sousa Neto et al., 2011; Veldkamp et al., 2013; Werner et al., 2006, 2007; Wolf et al., 2012), some ecosystems function as a net atmospheric source, or fluctuate ...
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Atmospheric Methane: Natural and Anthropogenic Sources
... of methane contamination resulting from UGS operation, specialists of Energodiagnostika LLC offered to use methanotrophs – bacteria that live on methane (Vlasov et ...the methane content in the ...
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Consumption of atmospheric methane by soil in a lowland broadleaf mixed forest
... Soils of forest ecosystems can release or consume methane (CH 4 ) depending on their specific hydrological regime. Our study reported the consumption of CH 4 by soil in a lowland broadleaf mixed temperate forest ...
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Subterranean Karst Environments as a Global Sink for Atmospheric Methane
... acetate fermentation, and through carbonate reduction, and that (ii) CH 4 is removed from cave air. 360[r] ...
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Quantifying methane point sources from fine-scale satellite observations of atmospheric methane plumes
... Anthropogenic methane emissions originate from a large number of relatively small point ...measuring methane column plumes over selected ∼ 10 × 10 km 2 domains with ≤ 50 × 50 m 2 pixel resolution and 1 %–5 ...
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Atmospheric methane control mechanisms during the early Holocene
... the atmospheric CH 4 gradient between Greenland and Antarctica during the Holocene, ...mospheric methane by continuous-flow and laser spectrometer analysis along the NEEM ice core, ...
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Analytical constraints on layered gas trapping and smoothing of atmospheric variability in ice under low-accumulation conditions
... The methane mixing ratio at a given depth is computed using an atmospheric trend history and a gas age distribution (GAD) of trapped gases (Romme- laere et ...The atmospheric methane scenario ...
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Abrupt change in climate and climate models
... in atmospheric methane (Chappellaz et ...lower methane content and higher mineral dust aerosol con- centrations characterizing cold phases (Mayewski et ...the methane and dust changes were ...
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Sensitivity studies for a space-based methane lidar mission
... A major handicap to better understand the underlying pro- cesses and to quantify the emissions is the lack of accurate global observations of atmospheric methane. Ground-based in-situ measurements are ...
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Bayesian atmospheric tomography for detection and quantification of methane emissions: application to data from the 2015 Ginninderra release experiment
... using atmospheric tomography) were factors of 2 or more off from the true ...that atmospheric methane concentration and meteorological instrument measurement uncertainty is gen- erally low for each ...
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Methane profiles from GOSAT thermal infrared spectra
... of atmospheric methane profiles from the thermal infrared band of the Japanese Greenhouse Gases Observing Satellite (GOSAT) between 1210 and 1310 cm −1 , using the RemoTeC analy- sis ...vertical ...
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