Sentences with phrase «did gas hydrates»
«Why did gas hydrates melt at the end of the last ice age?
https://www.sciencedaily.com/ Not exact matches
Similar frozen methane hydrates occur throughout the same arctic region as they did in the past, and warming of the ocean and release of this methane is of key concern as methane is 20x the impact of CO2 as a greenhouse gas.
The study observed active methane plumes rising from the seabed, but most of the gas was not from hydrates and much of it did not reach the atmosphere.
Tapping into thawing permafrost for methane — which does not necessarily mean methane hydrates — would also present similar risks in producing conventional natural gas.
Nor do we adequately understand the relative contributions of microbes (i.e., biogenic methanogenesis), fossil sources, and the dissociation of gas hydrates (an ice - like substance formed by methane and water under pressure).
In most places on continental slopes, gas hydrate does not exist in the upper 10 + meters of sediment (which is another reason for why David is very likely correct in stating that the process of thermal dissociation is slow — heat has to propagate into the sediment).
This is largely unrelated to the initial topic, because the described feature likely has nothing to do with dissociation of gas hydrate, for reasons noted by several people.
Meanwhile, shale gas «fracking» and the potential recovery of methane hydrates from the ocean floor demonstrate that there is a great deal of R&D left to do in the fossil fuel sector.
«The gas hydrates are dissolving with a time delay, so that the consequences will be felt in two to three hundred years — a time frame which doesn't allow any definitive statements to be made now.
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.
Improvements in our understanding of clathrate chemistry and sedimentology have revealed that hydrates form in only a narrow range of depths (continental shelves), at only some locations in the range of depths where they could occur (10 - 30 % of the Gas hydrate stability zone), and typically are found at low concentrations (0.9 — 1.5 % by volume) at sites where they do occur.
Similar disclosures are also made by Max et al., in an article entitled Oceanic Gas Hydrate: Guidance for Research and Programmatic Development for work done at the Naval Research Laboratory bearing a date of Dec. 31, 1997.