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... Science Frontiers ONLINE No. 77: Sep-Oct 1991 Issue Contents Other pages Home Page Science Frontiers Online All Issues This Issue Sourcebook Project Sourcebook Subjects Methane hydrate: past friend or future foe?What looks like a grayish ice cube, fizzes at its edges, and soon wastes away to a puddle of water? If you wish, you can accelerate the substance's demise by touching a match to it; it is packed with potential energy. The substance is methane hydrate, and it is found in prodigious quantities in oceanic sediments. Each cubic centimeter of methane hydrate contains about 160 cubic centimeters of methane at standard conditions; it is a concentrated source of natural gas. In fact, methane hydrate deposits in the world's oceans hold twice as much carbon as all the ... , oil, and gas reserves on land! But methane hydrate may be much more than a future fuel source; it may have been humanity's savior in eons gone by; it may be our future nemesis. You see, methane hydrate is very unstable; changes of temperature or pressure on a global basis can trigger the release of immense volumes of this greenhouse gas from oceanic deposits. For example, when the Ice Ages lowered ocean levels by locking up water in the advancing ice caps, pressures on ocean-bottom methane hydrate lessened and, according to some speculators, released enough gas so that the increased greenhouse heating turned back the Ice Ages. (Was Gaia at work here?) On the other hand, if present human activities are truly stoking the greenhouse effect, ocean ...
Terms matched: 2 - Score: 983 - 15 May 2017 - URL: /sf077/sf077g12.htm
... Science Frontiers ONLINE No. 111: May-Jun 1997 Issue Contents Other pages Home Page Science Frontiers Online All Issues This Issue Sourcebook Project Sourcebook Subjects Methane Burps And Gas-hydrate Reservoirs Readers will be forgiven for any skepticism they may harbor about methane burps from the sea floor bringing down TWA flight 800. (SF#110) The media have said little about the staggering quantities of methane and higher hydrocarbons locked up in frozen hydrates around the edges of the continents. Actually, the small methane burps are minor problems compared to the catastrophic climate changes that could be forced if just a small portion of the gases frozen under the sea floor were released into the atmosphere. Gas-hydrates are unimpressive when brought to the surface -- just dirty, fizzy ice. However, taken together ... they contain more carbon than all the world's oil fields, perhaps much more. Most estimates fall between 1,700 and 11,000 billion tons, but there is one scientist who pegs these cold-storage carbon deposits at 4,100,000 billion tons. In comparison, human releases of carbon to the atmosphere via the burning of wood, gas, coal, and even the collective flatulence of all the planet's animals are trivial. Geological evidence confirms that past climate swings were associated with large injections of carbon into the atmosphere and oceans. A major contributor to these "carbon burps" may be decomposing methane hydrate. Until recently, climatologists have questioned the sizes of gas-hydrate deposits, but cores extracted from the Blake Ridge off the Carolina coast confirm the ...
Terms matched: 2 - Score: 951 - 15 May 2017 - URL: /sf111/sf111p09.htm
... Science Frontiers ONLINE No. 110: Mar-Apr 1997 Issue Contents Other pages Home Page Science Frontiers Online All Issues This Issue Sourcebook Project Sourcebook Subjects Did a methane burp down twa800?The potential for methane eruptions from offshore sediments to sink ships and down aircraft was proposed by W.D . McIver way back in 1982, in the Bulletin of the American Association of Petroleum Geologists. (SF#25/208) The source of methane-gas releases (" burps") is the rapid decomposition of methane hydrate, which exists in prodigious quantities in offshore sediments. Some geologists have estimated that there is twice as much methane in methane-hydrate deposits as in all terrestrial natural-gas fields. What makes methane hydrate potentially lethal is its instability. Landslides and small quakes can ... huge plumes of methane bubbles into the ocean and thence into the atmosphere. Ships might founder in the lowdensity froth of bubbles, and aircraft might be adversely affected, too. This is where TWA800 comes in. R. Spalding, a scientist at Sandia National Laboratories has been monitoring mysterious atmospheric explosions and believes that some of these detonations are consistent with the atmospheric ignition of huge methane plumes. (Other detonations are due to meteors.) Spalding proposes the following scenario: The ocean floor releases a massive methane gas plume, which rapidly rises to the surface and ascends into the atmosphere. The lighter-than-air methane cloud gains altitude, mixing with oxygen and thereby gaining explosive poten tial. An electrical disturbance -- possibly caused by the rising cloud itself or a lightning strike -- ...
Terms matched: 2 - Score: 529 - 15 May 2017 - URL: /sf110/sf110p09.htm
... papers relating to giant sea-bed pockmarks. In Ref. 1, J.T . Kelley et al describe a pockmark field in Belfast Bay, Maine. Here, the density of the pockmarks reaches 160 per km2, and they are apparently the largest pockmarks yet discovered. The Belfast Bay field is "fresh" and "active" in the sense that the pockmarks are sharply defined and methane bubbles still stream up from buried organic matter. Natural-gas plume rising from the sea-floor off the Carolina coast. Another pockmark field is the subject of P.R . Vogt et al (Ref. 2). It occupies a strip about 1.3 km wide and 50 km long between Greenland and Spitzbergen. This strip of pockmarks seems to be underlain by a deposit ... methane hydrate 200-300 meters thick. [Methane hydrate is a weird substance that looks like dirty ice. When brought to the surface, the methane fizzes away, leaving only a puddle of dirty water!] Lastly, in Ref. 3, C.K . Paull et al report on the release of plumes of methane bubbles from the Carolina continental rise at a depth of 2167 meters. Here, the sediments are riddled with methane hydrate. Why all this fuss over fizzy ice, and what is the connection between methane hydrate and pockmarks? The methane hydrate deposits represent immense accumulations of methane -- probably far more natural gas than geologists have found on the continents. Sea-bed pockmarks are thought to be formed when methane gas is explosively vented, perhaps when methane hydrate - ...
Terms matched: 2 - Score: 502 - 15 May 2017 - URL: /sf100/sf100g09.htm
... Science Frontiers ONLINE No. 128: MAR-APR 2000 Issue Contents Other pages Home Page Science Frontiers Online All Issues This Issue Sourcebook Project Sourcebook Subjects Burps of Death Not only did the poor dinosaurs have to contend with an asteroid impact and a lurch of the poles, but also with the possible ignition of voluminous methane burps. 65-million years ago. This was the time of the well-publicized, but still hypothetical, asteroid impact. It is said to have wreaked havoc on our wounded planet and, especially, the dinosaurs. Volcanos spewed out vast lava fields and filled the air with greenhouse gases and dust. It was a bad time for many life forms. Actually, It may have been far worse than generally advertised. In addition to the volcanic activity and climate ... , the shock of the asteroid impact could have been sufficient to destabilize the immense amounts of methane hydrate that have long been locked up, frozen and dormant, in oceanic sediments all over the world. According to this scenario, once the shock of the asteroid impact released the methane from its icy prison, it rose to the surface of the oceans in a world-wide burp. Methane, unfortunately for the dinosaurs and many other life forms, is highly flammable. Lightning could have ignited it almost immediately if it was concentrated enough. A colossal firestorm might have then enveloped the entire planet. The whole atmosphere could have been afire. This, according to B. Hurdle and colleagues at the Naval Research Laboratory, who speculate that the dinosaur hegemony may ended suddenly in flames rather than in ...
Terms matched: 2 - Score: 432 - 15 May 2017 - URL: /sf128/sf128p09.htm
... . It seals sport in fresh water 1,000 kilometers from the nearest salt water. (How did they get there?) Even more interesting are Baikal's thermal vents or chimneys that are otherwise restricted to cracks in the earth's crust in the deep oceans. Further enhancing Baikal's marine attributes, deep drilling and seismic profiles have recently discovered the existence of gas hydrates (methane hydrate, for example). Plumes of gas bubbles have also been detected where gas hydrates have been tectonically disturbed. There are even craters on Baikal's deep bottom where gas hydrates have erupted explosively. (De Batist, Marc, et al; "Tectonically Induced Gas-Hydrate Destabilization and Gas Venting in Lake Baikal, Siberia," Eos, 80:F502, 1999.) ... salty oceans. It seals sport in fresh water 1,000 kilometers from the nearest salt water. (How did they get there?) Even more interesting are Baikal's thermal vents or chimneys that are otherwise restricted to cracks in the earth's crust in the deep oceans. Further enhancing Baikal's marine attributes, deep drilling and seismic profiles have recently discovered the existence of gas hydrates (methane hydrate, for example). Plumes of gas bubbles have also been detected where gas hydrates have been tectonically disturbed. There are even craters on Baikal's deep bottom where gas hydrates have erupted explosively. (De Batist, Marc, et al; "Tectonically Induced Gas-Hydrate Destabilization and Gas Venting in Lake Baikal, Siberia," Eos, 80:F502, 1999 ...
Terms matched: 2 - Score: 300 - 15 May 2017 - URL: /sf130/sf130p08.htm
... Science Frontiers ONLINE No. 111: May-Jun 1997 Other pages Home Page Science Frontiers Online All Issues Last Issue Next Issue Sourcebook Project Sourcebook Subjects Contents Archaeology Ancient entertainments Tobacco and cocaine in ancient egypt An anasazi ley line? Astronomy Extraterrestrial handedness Biology Circaseptennial rhythm in ear growth Life on different scales Chromosome choreograph Is perfect pitch favored by natural selection? Carnot creatures Geology Methane burps and gas-hydrate reservoirs Why some sands sing, squeak, and boom Geophysics White streak from a tv set Exotic seismic signals Psychology Malleable memories Math & Physics Levitation and levity! Something strange is going on! ...
Terms matched: 2 - Score: 291 - 15 May 2017 - URL: /sf111/index.htm
... OR FREAKS OF NATURE? A PAPER TRAIL FROM ASIA TO THE AMERICAS Astronomy Mercury: the impossible planet Eclipse shadow-band anomalies Biology Supernova theory exploded NO UNKNOWN MONSTERS IN THOSE FIJI UNDERWATER CAVES: NEVERTHELESS, THE MYSTERY DEEPENS DO BIRDS USE GENETIC MAPS DURING MIGRATION? Cooler heads, bigger brains? The aye-aye, a percussive forager identical Geology VALLEYS OF DEATH AND ELEPHANT GRAVEYARDS Anthracite man? METHANE HYDRATE: PAST FRIEND OR FUTURE FOE? The gruyerizaton of switzerland faulting Geophysics CROP CIRCLES: DAISY PATTERNS AND A RED BALL OF LIGHT Hovering ball of fire SOME OLD GEYSERS ARE NOT SO FAITHFUL WATER'S MEMORY OR BENVENISTE STRIKES BACK Physics Drip, drop, drup, dr** ...
Terms matched: 2 - Score: 291 - 15 May 2017 - URL: /sf077/index.htm
... different source. (Anonymous; "Coastal Residents Jolted by Mysterious Booms," Lincoln Times-news, January 29, 2001. Cr. G. Fawcett via. L. Farish.) Comment. Such booms have plagued the North Carolina shore for many years -- perhaps centuries. (SF#73) Rather than earthquakes, the booms are more likely due to the spontaneous detonations of methane "burps" rising from destabilized methane hydrate, which exists in large quantities off the Carolina shores. (SF#100) The Carolina booms probably are, therefore, analogous to the "mistpouffers" heard along European shores and the famous Barisal Guns of India. From Science Frontiers #136, JUL-AUG 2001 . 2001 William R. Corliss Other Sites of Interest SIS . Catastrophism, ... , ancient history, mythology and astronomy. Lobster . The journal of intelligence and political conspiracy (CIA, FBI, JFK, MI5, NSA, etc) Homeworking.com . Free resource for people thinking about working at home. ABC dating and personals . For people looking for relationships. Place your ad free. ...
Terms matched: 2 - Score: 271 - 15 May 2017 - URL: /sf136/sf136p11.htm
... the atmosphere. Both fluvial episodes, in this view, occurred when something caused the Martian crust to release huge quantities of stored water. Hydrothermal activity is mentioned as a possibility. (Eberhart, J.; "The Martian Atmosphere: Old Versus New," Science News, 135:21, 1989.) Comment. Another speculation is that immense quantities of Martian water are tied up in methane hydrate and is released when the ambient temperature is somehow increased or perhaps by seismic activity. Reference. Anomalous characteristics of the Martian surface are cataloged in chapters AME and AMO in our catalog: The Moon and the Planets. Details here . From Science Frontiers #62, MAR-APR 1989 . 1989-2000 William R. Corliss ...
Terms matched: 2 - Score: 260 - 15 May 2017 - URL: /sf062/sf062a04.htm
