Archives par mot-clé : Methane

Réserves de gaz dans le monde

by Connaissances des Energies, 17 février 2015

Les cinq pays disposant des plus importantes réserves de gaz au monde sont :

Methane Emissions: from blind spot to spotlight

by The Oxford Institute for Energy Studies, July 2017

Very comprehensive file, 39 pages .pdf

Methane emissions influence but do not undermine the environmental case for gas. If the industry can build on the progress to date and deliver a clearer picture on the level of emissions and actions to address them, the arguments for gas displacing coal in power generation and oil products in transport become much stronger.

The Vostok Ice Core: Temperature, CO2 and CH4

by Euan Means, December 12, 2014

In their seminal paper on the Vostok Ice Core, Petit et al (1999) [1] note that CO2 lags temperature during the onset of glaciations by several thousand years but offer no explanation. They also observe that CH4 and CO2 are not perfectly aligned with each other but offer no explanation. The significance of these observations are therefore ignored. At the onset of glaciations temperature drops to glacial values before CO2 begins to fall suggesting that CO2 has little influence on temperature modulation at these times.

See also here


by CNN Money, May 21, 2017 in GWPF

The fuel-hungry country has been pursuing the energy source, located at the bottom of oceans and in polar regions, for nearly two decades. China’s minister of land and resources, Jiang Daming, said Thursday that the successful collection of the frozen fuel was “a major breakthrough that may lead to a global energy revolution,” according to state media.

Experts agree that flammable ice could be a game changer for the energy industry, similar to the U.S. shale boom. But they caution that big barriers — both technological and environmental — need to be cleared to build an industry around the frozen fuel, which is also known as gas hydrate.

Are methane seeps in the Arctic slowing global warming?

by Randall Hayman, May 8, 2017, in Science

Good news about climate change is especially rare in the Arctic. But now comes news that increases in one greenhouse gas—methane—lead to the dramatic decline of another. Research off the coast of Norway’s Svalbard archipelago suggests that where methane gas bubbles up from seafloor seeps, surface waters directly above absorb twice as much carbon dioxide (CO2) as surrounding waters. The findings suggest that methane seeps in isolated spots in the Arctic could lessen the impact of climate change.

Methane-munching microbes living in the deep biosphere for 400 million years: An analogue for extra-terrestrial life

by Linnaeus University, May 9, 2017 in ScienceDaily

It is becoming more and more appreciated that a major part of the biologic activity is not going on at the ground surface, but is hidden underneath the soil down to depths of several kilometres in an environment coined the « deep biosphere ». Studies of life-forms in this energy-poor system have implications for the origin of life on our planet and for how life may have evolved on other planets, where hostile conditions may have inhibited colonization of the surface environment. The knowledge about ancient life in this environment deep under our feet is extremely scarce.

Methane seeps in the Canadian high Arctic

by Geological Society of America, April 13, 2017

in ScienceDaily

Cretaceous climate warming led to a significant methane release from the seafloor, indicating potential for similar destabilization of gas hydrates under modern global warming. A field campaign on the remote Ellef Ringnes Island, Canadian High Arctic, discovered an astounding number of methane seep mounds in Cretaceous age sediments.

Methane emissions from trees

Tree trunks act as methane source in upland forests

by University of Delaware, March 30, 2017

Methane is about 25 times stronger than carbon dioxide, with some estimates as high as 33 times stronger due to its effects when it is in the atmosphere.

Because of methane’s global warming potential, identifying the sources and « sinks » or storehouses of this greenhouse gas is critical for measuring and understanding its implications across ecosystems.

Daniel L. Warner, Samuel Villarreal, Kelsey McWilliams, Shreeram Inamdar, Rodrigo Vargas. Carbon Dioxide and Methane Fluxes From Tree Stems, Coarse Woody Debris, and Soils in an Upland Temperate ForestEcosystems, 2017; DOI: 10.1007/s10021-016-0106-8

The interaction of climate change and methane hydrates

by C.D. Ruppel and J.D. Kessler, 8 February 2017

Gas hydrate, a frozen, naturally-occurring, and highly-concentrated form of methane, sequesters significant carbon in the global system and is stable only over a range of low-temperature and moderate-pressure conditions. Gas hydrate is widespread in the sediments of marine continental margins and permafrost areas, locations where ocean and atmospheric warming may perturb the hydrate stability field and lead to release of the sequestered methane into the overlying sediments and soils. Methane and methane-derived carbon that escape from sediments and soils and reach the atmosphere could exacerbate greenhouse warming.

La contribution du gaz naturel dans le mix énergétique augmente dans tous les scénarios

M.J. Nadeau, Conseil mondial de l’énergie, 2016-2017

Réunis au congrès triennal du Conseil mondial de l’énergie (CME) à Istanbul en octobre 2016, les leaders du secteur de l’énergie ont tous témoigné de l’importance des bouleversements auxquels l’industrie est confrontée. Pour nous aider à comprendre les phénomènes qui prévalent et leurs  impacts sur le secteur, le CME a publié fin 2016 son dernier rapport sur les scénarios énergétiques mondiaux(1). Ce rapport explore trois scénarios possibles à l’horizon 2060 et fournit aux experts un cadre de réflexion utile.