Science Fiction
Dictionary
A B C D E F G H I J K L M N O P Q R S T U V W X Y Z
 |
Does Earth's Middle Mantle Hold Oceans Of Water?
Japanese and German researchers have found evidence that suggests the middle of Earth’s mantle holds as much water as the planet’s oceans.
(Mantle Transition Zone (MTZ) depth of 410 to 660 km )
An open question for solid-earth scientists is the amount of water in Earth’s interior. The uppermost mantle and lower mantle contain little water because their dominant minerals, olivine and bridgmanite, have limited water storage capacity. In contrast, the mantle transition zone (MTZ) at a depth of 410 to 660 km is considered to be a potential water reservoir because its dominant minerals, wadsleyite and ringwoodite, can contain large amounts of water [up to 3 weight % (wt %)].However, the actual amount of water in the MTZ is unknown. Given that water incorporated into mantle minerals can lower their viscosity, we evaluate the water content of the MTZ by measuring dislocation mobility, a property that is inversely proportional to viscosity, as a function of temperature and water content in ringwoodite and bridgmanite. We find that dislocation mobility in bridgmanite is faster by two orders of magnitude than in anhydrous ringwoodite but 1.5 orders of magnitude slower than in water-saturated ringwoodite.
To fit the observed mantle viscosity profiles, ringwoodite in the MTZ should contain 1 to 2 wt % water. The MTZ should thus be nearly water-saturated globally.
Science fiction writer Stephen Baxter has created a series of novels, starting with Flood, that describe a near-future Earth in which the oceans are rising. In the story, global warming melts ice sheets, which raises ocean levels. However, the water keeps rising. With the weight of ice removed, Earth's inner water rises. I'm not going to reveal what happens.
Via NextBigFuture.
Scroll down for more stories in the same category. (Story submitted 5/23/2017)
Follow this kind of news @Technovelgy.| Email | RSS | Blog It | Stumble | del.icio.us | Digg | Reddit |
Would
you like to contribute a story tip?
It's easy:
Get the URL of the story, and the related sf author, and add
it here.
Comment/Join discussion ( 0 )
Related News Stories - (" Engineering ")
Roborock Saros Z70 Is A Robot Vacuum With An Arm
'Anything larger than a BB shot it picked up and placed in a tray...' - Robert Heinlein, 1956.
Secret Kill Switch Found In Yutong Buses
'The car faltered as the external command came to brake...' - Keith Laumer, 1965.
The Desert Ship Sailed In Imagination
'Across the ancient sea floor a dozen tall, blue-sailed Martian sand ships floated, like blue smoke.' - Ray Bradbury, 1950.
The Zapata Air Scooter Would Be Great In A Science Fiction Story
'Betty's slapdash style.'
Technovelgy (that's tech-novel-gee!) is devoted to the creative science inventions and ideas of sf authors. Look for the Invention Category that interests you, the Glossary, the Invention Timeline, or see what's New.
Science Fiction
Timeline
1600-1899
1900-1939
1940's 1950's
1960's 1970's
1980's 1990's
2000's 2010's
Current News
Golf Ball Test Robot Wears Them Out
"The robot solemnly hit a ball against the wall, picked it up and teed it, hit it again, over and again...'
Boring Company Vegas Loop Like Asimov Said
'There was a wall ahead... It was riddled with holes that were the mouths of tunnels.'
Rigid Metallic Clothing From Science Fiction To You
'...support the interior human structure against Jupiter’s pull.'
Is The Seattle Ultrasonics C-200 A Heinlein Vibroblade?
'It ain't a vibroblade. It's steel. Messy.'
Roborock Saros Z70 Is A Robot Vacuum With An Arm
'Anything larger than a BB shot it picked up and placed in a tray...'
A Beautiful Visualization Of Compact Food
'The German chemists have discovered how to supply the needed elements in compact, undiluted form...'
Bone-Building Drug Evenity Approved
'Compounds devised by the biochemists for the rapid building of bone...'
Secret Kill Switch Found In Yutong Buses
'The car faltered as the external command came to brake...'
Inmotion Electric Unicycle In Combat
'It is about the size and shape of a kitchen stool, gyro-stabilized...'
Grok Scores Best In Psychological Tests
'Try to find out how he ticks...'
PaXini Supersensitive Robot Fingers
'My fingers are not that sensitive...'
Congress Considers Automatic Emergency Braking, One Hundred Years Too Late
'The greatest problem of all was the elimination of the human element of braking together with its inevitable time lag.'
The Desert Ship Sailed In Imagination
'Across the ancient sea floor a dozen tall, blue-sailed Martian sand ships floated, like blue smoke.'
The Zapata Air Scooter Would Be Great In A Science Fiction Story
'Betty's slapdash style.'
Thermostabilized Wet Meat Product (NASA Prototype)
There are no orbiting Michelin stars. Yet.
Could Crystal Batteries Generate Power For Centuries?
'Power could be compressed thus into an inch-square cube of what looked like blue-white ice'
