Results 21 to 30 of about 142,213 (242)

Heavy hydrogen in the stratosphere [PDF]

, 2003
We report measurements of the deuterium content of molecular hydrogen (H2) obtained from a suite of air samples that were collected during a stratospheric balloon flight between 12 and 33 km at 40º N in October 2002. Strong deuterium enrichments of up to
Rhee, T.S., Rhee, T., Engel, A., Röckmann, Thomas, A. Engel, Rhee, T. S., Rhee, Tae Siek, T. Röckmann, T. S. Rhee, Engel, Andreas, Röckmann, T.   +10 more
core   +2 more sources

Scalable Fabrication of MOF Glass Membranes for Gas Separation via Stepwise Phase Transition. [PDF]

Adv Sci (Weinh)
Metal‐organic framework (MOF) glass membranes, with their excellent processability and permanent pore structure, have great potential for gas separation applications. However, during large‐scale fabrication, defects and obvious cracks are prone to occur due to the limitations of powder processing.
Ye M, Yang Y, Yang Z, Sun Y, Ao, Zhou F, Chen Y, Luo C, Wang Z, Sun W, Jia Y, Huang W, Hou J, Wang Z, Qiao Z.   +14 more
europepmc   +2 more sources

Release of CO2 and CH4 from lakes and drainage ditches in temperate wetlands [PDF]

, 2010
Shallow fresh water bodies in peat areas are important contributors to greenhouse gas fluxes to the atmosphere. In this study we determined the magnitude of CH4 and CO2 fluxes from 12 water bodies in Dutch wetlands during the summer season and studied ...
P. A. Leffelaar, F. Berendse, Schrier-Uijl, A.P., Veenendaal, E.M., A. J. Veraart, Berendse, F., Veraart, A.J., E. M. Veenendaal, Leffelaar, P.A., A. P. Schrier-Uijl   +9 more
core   +1 more source

Methanogenesis exceeds CH4 consumption in eutrophic lake sediments

Limnology and Oceanography Letters, 2021
Lakes and reservoirs collectively contribute significant amounts of methane (CH4) to the global atmosphere. If CH4 production were not at least partially balanced by consumption (oxidation) in most of these systems, they could potentially emit an order ...
Sofia L. D'Ambrosio, John A. Harrison
doaj   +1 more source

Dominance of Diffusive Methane Emissions From Lowland Headwater Streams Promotes Oxidation and Isotopic Enrichment

Frontiers in Environmental Science, 2022
Inland waters are the largest natural source of methane (CH4) to the atmosphere, yet the contribution from small streams to this flux is not clearly defined.
Andrew L. Robison, Andrew L. Robison, Wilfred M. Wollheim, Clarice R. Perryman, Annie R. Cotter, Jessica E. Mackay, Ruth K. Varner, Paige Clarizia, Jessica G. Ernakovich   +8 more
doaj   +1 more source

The isotopic composition of methane in the stratosphere : high-altitude balloon sample measurements [PDF]

, 2011
The isotopic composition of stratospheric methane has been determined on a large suite of air samples from stratospheric balloon flights covering subtropical to polar latitudes and a time period of 16 yr.
Brass, Marc, Engel, A., Röckmann, Thomas, A. Engel, Borchers, Reinhard, T. Röckmann, M. Brass, Brass, M., Engel, Andreas, Röckmann, T., Borchers, R., R. Borchers   +11 more
core   +2 more sources

An experimental study on nonlinear seepage characteristics in coal seams during CH4 displacement through N2 and CO2 flooding

Meitian dizhi yu kantan
BackgroundCoal seams in China are generally characterized by low porosity (
Zefeng LI, Mengru HUANG, Hongzhong ZHANG, Jianping LAN, Jinsuo SONG, Shixing FAN   +5 more
doaj   +1 more source

Soil methane (CH4) fluxes in cropland with permanent pasture and riparian buffer strips with different vegetation [PDF]

, 2021
Background Methane (CH4) has a global warming potential (GWP) 28 times that of carbon dioxide (CO2) over a 100-year horizon. Riparian buffers strips are widely implemented for their water quality protection functions along agricultural land, but ...
Dlamini, J., Collins, A. L., Cardenas, L. M., Blackwell, M. S. A., Hawkins, J. M. B., Tesfamariam, E. H., Evans, J., Dunn, R. M.   +7 more
core   +1 more source

Characteristics and Influencing Factors of Soil CH4 and N2O Fluxes in Typical Broad-leaved Forests in the Yangtze River Delta Region, China

Shuitu Baochi Xuebao
[Objective] The forest coverage rate in the Yangtze River Delta region reaches 33.4%, and the underlying surface soil may have an important impact on the regional greenhouse gas budget.
JIA Qinqi, XU Fei, CHEN Bingjiang, LU Yanran, CHEN Lihan, HU Jiahao, GUO Na, FANG Shuangxi   +7 more
doaj   +1 more source

Chromatography-vacuum low temperature method of methane enrichment and isotopic fractionation in gas samples

Shiyou shiyan dizhi
Methane (CH4) clumped isotope analysis plays a crucial role in the fields of climate change, energy exploration, and planetary research. The purity of CH4 in samples directly affects the precision and accuracy of high-resolution mass spectrometry in ...
Qingmei LIU, Jiacheng LI, Wenmin JIANG, Yongqiang XIONG   +3 more
doaj   +1 more source