Sentences with phrase «marine methane hydrate»

GHG emissions from marine methane hydrate and terrestrial permafrost may have acted as positive feedbacks (DeConto et al., 2012)...

Given the vastness of the world's marine methane hydrate deposits — more than twice the carbon reserves of all other fossil fuels combined — it's not surprising that government agencies and the petroleum and natural gas industries have long been interested in harvesting this new energy supply.

• Similarly, Eillott et al (2011), Reagan (2011) and Reagan and Moridis (2008), for the equivalent of RCP 8.5 50 % CL methane emissions from global marine methane hydrates could be 0.3 GtCH4 / yr by 2100.

Not exact matches

It seems quite likely that continued global warming will increase the emissions of methane from permafrost deposits and marine hydrates.

Its chapters address: excess nitrogen in the environment; combating (re) emerging infectious diseases; marine fish and shellfish farming; illegal wildlife trade; methane hydrates; realizing the potential of citizen science; air pollution; plastic debris in the ocean; securing soil carbon benefits; and rapid change in the Arctic.

Methane hydrate can form in Arctic and marine environments.

However, most of the methane produced from dissociating marine hydrates will be consumed by anaerobic processes in the top few metres of sulphate - rich near - sea - floor sediments and all of the rest will be dissolved and oxidized in sea water and will not be released to the atmosphere as methane, although the dissolved CO2 will equilibrate with atmosphere after a few centuries.

Warming destabilises permafrost and marine sediments of methane gas hydrates in some regions according to some model simulations (Denman et al., 2007 Section 7.4.1.2), as has been proposed as an explanation for the rapid warming that occurred during the Palaeocene / Eocene thermal maximum (Dickens, 2001; Archer and Buffett, 2005).

«According to the Clathrate Gun Hypothesis (Kennett et al., submitted) episodic atmospheric CH4 emissions resulting from instability of the marine sedimentary methane hydrate (clathrate) reservoir contributed significantly to the distinctive behavior of late Quaternary climate on orbital (Milankovitch) and millennial time scales.

Knowledge of the timescales of gas hydrate dissociation and subsequent methane release are critical in understanding the impact of marine gas hydrates on the ocean — atmosphere system, says Shyam Chand, researcher at NGU / CAGE.

The consortium will coordinate scientific input and develop plans for future marine hydrate expeditions to conduct research drilling, recovering samples of the formation, logging and analytical activities to assess the geologic occurrence, regional context, and characteristics of methane hydrate deposits along the continental margins of the United States, likely focusing on the Gulf of Mexico and the Atlantic margin.

Recent discoveries of methane hydrate in arctic and deep - water marine environments have highlighted the need for a better understanding of this substance as a natural storehouse of carbon and a potential energy resource.

C (or methane hydrates / clathrates, in case that isn't considered geologic)-RRB-, Halting all marine photosynthesis and letting respiration / decay continue at the same rate (it would actually decay over time as less organic C would be available) would result in an O2 decrease at a rate of about 0.011 % per year, but it could only fall at that rate for about 3 weeks, with a total O2 decrease of about 0.000675 % (relative to total O2, and not counting organic C burial, which wouldn't make a big difference); Halting all land photosynthesis and letting respirationd / decay proceed at the same rate would cause O2 to fall about 0.027 % per year for about 19 years, with a total drop of about 0.52 %.

Wood, W.T., J.F. Gettrust, N.R. Chapman, G.D. Spence, and R.D. Hyndman, Decreased stability of methane hydrates in marine sediments owing to phase - boundary roughness, Nature, 420 (6916), 656 - 660, 2002.