by steam_cannon » Wed 07 Mar 2007, 01:28:21
Clathrates Hydrates may protect us from "Iceball Earth" scenarios...
And dredging could cause tsunamis...
$this->bbcode_second_pass_quote('To quote myself...', '
')$this->bbcode_second_pass_quote('Shallow thinker', 'C')lathrates... ...Better to burn it before it melts on it's own from global warming
It seems that just the opposite is true.
Clathrates protect us from "Iceball Earth" scenarios. Clathrates structures are more pressure sensitive then temperature sensitive. When water is deposited on land as glaciers during an ice age, sea levels fall. This destabilizes millions of years of Clathrate deposits and helps to flip the climate back into a warm cycle. At least there is a strong possibility of this.
Simply Put: Clathrates in melting permafrost contribute to global warming immensely. But Clatrates underwater protect us from death by permanent ice age. So it is quite possible that if we do find a way to harness this energy, then it's a real devils bargain we're getting into.
Anyway, that is just one way to look at how Clathrate hydrate may fit into earths ability to sustain life.
methane from under the ocean --> what ever you want to call it...
Of course ruining a stability mechanism of the earth is just one problem with the stuff. Clathrates are also unstable, difficult to bring to the surface (with any efficiency or accuracy), and in thinner layers then previously thought making extraction of meaningful volumes difficult to engineer. Simple dredging does not work and is dangerous(possibly generating mudslides and tsunamis).
')Clathrates. For completeness, let me mention the last faint hope of those who cling to the fossil era. Clathrates are globules of ice and methane widely distributed on the continental shelves of the world’s oceans, and in the tundra. It is a highly dispersed resource. To disturb the clathrates is to pose the danger of releasing the methane (which is a potent greenhouse gas) or possibly generating mudslides and tsunamis on the sloping continental shelf in the mining process, and large scale dredging would inflict damage on marine fisheries beyond anything that fishing trawlers have yet inflicted.
The scientific consensus seems to be that clathrates are a highly uncertain and potentially disruptive source of energy, but Japan in its tireless search for energy has led at least two expeditions to see if the methane can be captured.