 |
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
")
China Steals Strato Airship Design From Google App Engine
'...war-balloons, or, as it would be more correct to call them, navigable aerostats.' - George Griffith, 1893.
Biohybrid Jellyfish Explore The Ocean
As predicted, and detailed, by science fiction writers!
3D-Printed Exoskeleton Learns From Your Hand
'...small electric motors at the principal joints worked the prosthetic framework by means of steel cables...' - Fritz Leiber, 1968
Smartwatch Powered By Slime Mold
'Living protoplasm incorporated into the Ampek F-a2 recording system...' - Philip K. Dick, 1966
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
RoboBallet The Dance Of Cooperative Robots
'...an integrated seven-unit robot team.'
Chrysalis Generation Ship to Alpha Centauri
'This was their world, their planet —
this swift-traveling, yet seemingly moveless vessel.'
Alexa+ And Its AI Brain Improvements
'What's it do?' he asked. 'It amuses.'
Does CloneRobotics Offer A True Android?
Is this What Little Girls Are Made Of?
Brain Implant Is Able To Capture Your Inner Dialogue
'So you see, you can hide nothing from me.'
Are AIs Going Rogue Like Hal 9000
'I know that you and Frank were planning to disconnect me...'
Animated Tumblebugs On Astounding Cover!
'Gaines and Harvey mounted tumblebugs, and kept abreast of the Cadet Captain...'
LingYuan Vehicle Roof Drones Now Available, ala Blade Runner 2049
Accompanied by a small selection of similar ideas from science fiction.
China Steals Strato Airship Design From Google App Engine
'...war-balloons, or, as it would be more correct to call them, navigable aerostats.'
The First Space Warship For Space Force
'Each of the electrical ships carried about twenty men...'
Biohybrid Jellyfish Explore The Ocean
As predicted, and detailed, by science fiction writers!
Should AIs and AI Robots Demand Rights?
'This robot is a creature... It is a manlike being. Therefore, like any other talking, thinking man, he is entitled to a court trial!'
Robot Learns Human Tool Usage By Imitation Learning
'I got one of those new electronic cameras...'
Companion Caregiver ChatGPT Dolls
'Every Artificial Friend is unique, right?'
'Pregnancy Humanoids' From China Replace Moms
'A great many of these synthetic babies were made...'
Man Builds 200 Foot Basement Firing Range
'The basement was huge... carved deep into the rock.'
More SF in the News Stories
More Beyond Technovelgy science news stories
|
 |