Results 71 to 80 of about 2,576,186 (345)

Evening Methane Emission Pulses from a Boreal Wetland Correspond to Convective Mixing in Hollows [PDF]

, 2013
Spatial and temporal heterogeneity of methane flux from boreal wetlands makes prediction and up-scaling challenging, both within and among wetland systems.
McNamara, Patrick J
core   +1 more source

Fingerprint of rice paddies in spatial-temporal dynamics of atmospheric methane concentration in monsoon Asia. [PDF]

, 2020
Agriculture (e.g., rice paddies) has been considered one of the main emission sources responsible for the sudden rise of atmospheric methane concentration (XCH4) since 2007, but remains debated.
Dong, Jinwei, Doughty, Russell B, Moore, Berrien, Qin, Yuanwei, Xiao, Xiangming, Xin, Fengfei, Zhang, Geli, Zhang, Yao   +7 more
core   +1 more source

Synthesis of recent ground-level methane emission measurements from the U.S. natural gas supply chain

, 2017
A synthesis of new methane (CH 4 ) emission data from a recent series of ground-based field measurements shows that 1.7% of the methane in natural gas is emitted between extraction and delivery (with a 95% confidence interval from 1.3% to 2.2%).
James A Littlefield, J. Marriott, Greg Schivley, Timothy J. Skone   +3 more
semanticscholar   +1 more source

Tuning Amorphous‐Crystalline Catalytic Interfaces by Mechanochemistry: Cu‐Based Metallic Glasses Coupled with Ceria for CO Oxidation

Advanced Materials, EarlyView.
Ball‐milling Cu‐based metallic glasses with ceria creates a unique nanostructure where metallic glass particles are wrapped by CeO2 nanoparticles. The intimate integration triggers copper state reorganization during reaction and aging, boosting CO oxidation and COPrOx activity.
Maahin Mirzay‐Shahim, Mehran Nabahat, Laia Pascua‐Solé, Isabel Serrano, Ilaria Lucentini, Xènia Garcia, Marina Armengol‐Profitós, Asier Agrelo‐Lestón, Ignasi Burgués‐Ceballos, Núria J. Divins, Ignacio J. Villar‐Garcia, Virginia Pérez‐Dieste, Carlos Escudero, Carlo Marini, Jordi Llorca, Eloi Pineda, Pere Bruna, Lluís Soler   +17 more
wiley   +1 more source

Emission and commercial utilization of coal mine methane in the Upper Silesian Coal Basin illustrated by the example of Katowice Coal Holding Company

Environmental & Socio-economic Studies, 2015
The article deals with the issue of the release of methane from coal seams and its emission to the atmosphere from the mines of Katowice Coal Holding Company in the years of 1997-2011.
Kędzior Sławomir
doaj   +1 more source

Spatiotemporal variation of methane and other trace hydrocarbon concentrations in the valley of Mexico [PDF]

, 2002
Mexico City is the world's largest and most polluted urban center. We examine the distribution of methane and other hydrocarbons within the Valley of Mexico, using it as a model for the role developing megacities will play in the next century of ...
Blake, DR, Elliott, S, Rowland, FS, Smith, FA   +3 more
core  

Ground-based NIR emission spectroscopy of HD189733b

, 2011
We investigate the K and L band dayside emission of the hot-Jupiter HD 189733b with three nights of secondary eclipse data obtained with the SpeX instrument on the NASA IRTF.
Agol, Bakos, Beaulieu, C. A. Griffith, Charbonneau, Charbonneau, Charbonneau, Drossart, G. Tinetti, I. P. Waldmann, M. R. Swain, Mandel, Mandell, P. Deroo, P. Drossart, Persival, Redfield, Riley, Swain, Swain, Tinetti, Yurchenko   +21 more
core   +3 more sources

Self-mixing interference effects in tunable diode laser absorption spectroscopy [PDF]

, 2009
We report the effects of self-mixing interference on gas detection using tunable diode laser spectroscopy. For very weak feedback, the laser diode output intensity gains a sinusoidal modulation analogous to that caused by low finesse etalons in the ...
Hodgkinson, Jane, Masiyano, Dackson, Schilt, S., Tatam, Ralph P.   +3 more
core   +2 more sources

Bottom-Up Estimates of Coal Mine Methane Emissions in China: A Gridded Inventory, Emission Factors, and Trends

Environmental Science and Technology Letters, 2019
China has large but uncertain coal mine methane (CMM) emissions. Inverse modeling (top-down) analyses of atmospheric methane observations can help improve the emission estimates but require reliabl...
J. Sheng, Shaojie Song, Yuzhong Zhang, R. Prinn, G. Janssens‑Maenhout   +4 more
semanticscholar   +1 more source

Polymorph‐Specific Electronic Transduction in WO3 during Molecular Sensing

Advanced Materials, EarlyView.
Metal‐oxide polymorphs with similar surface chemistry can nevertheless exhibit distinct sensing properties. In γ‐ and ε‐WO3, analyte adsorption appears comparable; yet, only ε‐WO3 induces a pronounced lattice electronic perturbation that accommodates charge in sub‐conduction band minimum states.
Matteo D'Andria, Meng Yin, Stefan Neuhauser, Vlasis G. Mavrantzas, Ying Chen, Ken Suzuki, Andreas T. Güntner   +6 more
wiley   +1 more source