Unknown
Westermann
In:
Geographische Rundschau (5). pp. 22-29.
Publication Date:
2017-06-16
Description:
Natural gas hydrate ist found worldwide in oceanic sediment around continents. The top of the gas hydrate stability zone is between 300-750 m of depths due to hydrate formation at elevated pressures (〉60 bar) and low temperatures (〈4°C), the availability and movement of methane-super-saturated pore fluids, tectonic contraints, and ocean hydrography. The base decreases with increasing depth in the ocean and depends on the geothermal gradient. It may range from 100s to 1000s of meters belowseaflorr. Methane usually originates from decomposition of organic matter. based on a continuously updated global inventory the current estimate for gas hydrates stands at 10x10x10 and 10x10x10x10 gigations of methane carbon. Varying percentages of this very large reserve are of major interest as a potential energy source. Gas hydrates are also of concern as an accelerating force in global warming and as a potential environmental hazard through submarine slumps. Currently they are vigorously promoted as a long-term and safe CO2-storage option in the form of hydrate.
Type:
Article
,
NonPeerReviewed
Format:
text
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