Sentences with phrase «large gas hydrate»

And Vestnesa is home to a very large gas hydrate system.

The numerical simulations of the seafloor also showed that the pockmarks in Nyegga are likely associated with this phenomenon because they are located right in the area of the largest gas hydrate dissociation event at the end of the Ice Age.

Not exact matches

They occurred over a very short time interval immediately following onset of Cretaceous global warming, suggesting that the warming destabilized gas hydrates and released a large burb of methane.

Suess now attributes this buoyancy, not a typical hydrate characteristic, to large bubbles of gas that accumulate in the top layers of the seafloor ooze before freezing.

A team of researchers from the GEOMAR Helmholtz Centre for Ocean Research Kiel together with colleagues from Bergen, Oslo and Tromsø (Norway), have now discovered that large - scale sedimentation caused by melting of glaciers in a region off Norway has played a greater role in gas hydrate dissociation than warming ocean waters.

Despite the rising sea level and therefore increasing pressure, the simulation showed that towards the end of the ice age large amounts of gas hydrate became unstable and the released gas escaped through the sediment to the seawater.

Carozza et al (2011) find that natural global warming occurred in 2 stages: First, global warming of 3 ° to 9 ° C accompanied by a large bolus of organic carbon released to the atmosphere through the burning of terrestrial biomass (Kurtz et al, 2003) over approximately a 50 - year period; second, a catastrophic release of methane hydrate from sediment, followed by the oxidation of a part of this methane gas in the water column and the escape of the remaining CH4 to the atmosphere over a 50 - year period.

Proposed hypothe - ses include (i) biogenic methane from gas hydrate dissociation (Dickens et al., 1995,1997); (ii) CO2 from extensive oxidation terrestrial organic carbon (Kurtz et al., 2003; Deconto et al., 2012); (iii) thermogenic methane derived from emplacement of a large 25 igneous province (LIP) in the North Atlantic (Svensen et al., 2010) or combinations of such sources (Sluijs et al., 2007; Panchuk et al., 2008).

Shale gas and coal bed methane and maybe methane hydrates are large resources.

Carozza et al (2011) find that natural global warming occurred in 2 stages: First, global warming of 3 ° to 9 ° C accompanied by a large bolus of organic carbon released to the atmosphere through the burning of terrestrial biomass (Kurtz et al, 2003) over approximately a 50 - year period; second, a catastrophic release of methane hydrate from sediment, followed by the oxidation of a part of this methane gas in the water column and the escape of the remaining CH4 to the atmosphere over a 50 - year period.

In Siberian permafrost, large deposits of methane gas are trapped in ice, forming what is called a gas hydrate.

It was developed by scientists at CAGE — Centre for Arctic Gas Hydrate Environment and Climate, and shows that seafloor off Western Svalbard was covered by a large ice sheet during the last glaciation.

Large amounts of methane are stored in seafloor sediments as gas hydrate, and as these melt the gas is released into the water column.

Furthermore, there are thought to be large amounts of non-conventional oil (e.g., heavy oil, tars sands, shales) and gas (e.g., methane hydrates).

The lakes may also be storing large volumes of the potent greenhouse gas methane, frozen in a form called methane hydrates.

Hornbach, Matthew J., Saffer, D.M., Holbrook, W. S., Van Avendonk, H.J.A., Gorman, A., «3D seismic imaging of the Blake Ridge methane hydrate province: evidence for large concentrated zones of gas hydrate and morphologically - driven advection,» Journal of Geophysical Research (Solid Earth), 2008.

Holbrook, W.S., Lizarralde, D., Pecher, I.A., Gorman, A.R., Hackwith, K.L., Hornbach, M.J., Saffer, D.M., «Escape of methane gas through sediment waves in a large methane hydrate province.»

Tim Collett, USGS senior scientist, said: «The discovery of what we believe to be several of the largest and most concentrated gas hydrate accumulations yet found in the world will yield the geologic and engineering data needed to better understand the geologic controls on the occurrence of gas hydrate in nature and to assess the technologies needed to safely produce gas hydrates.»

The work being done by the USGS is intended to not only discover where large concentrations of methane gas hydrates are located, but also to determine the best method for safely extracting the methane trapped in the hydrate.

And note their Section 4 — contemplating what happens if deep warm water currents change in a way that changes the current temperature in areas where methane hydrates are in equilibrium, suggesting the possibility of a rapid large scale release of methane gas.

On catastrophic methane degassing: Shakova and Semiletov have proposed a mechanism — the destabilisation of the permafrost cap overlying large methane hydrate deposits that contain a high proportion of free gas.

Government support will prioritize research into five types of renewables and energy forms: biomass fuels and biomass power, wind power, solar power, hydrogen energy and fuel cells, and natural gas hydrates, of which there is a large reserve in the South China Sea and which China recently succeeded in tapping.