The features would be the first
large ice volcanoes in the solar system, says Jeff Moore, a New Horizons scientist at NASA Ames Research Center in Mountain View, California, though the team is not yet willing to say the discovery is definite.
Not exact matches
Lurking between Mars and Jupiter is the
largest asteroid in the solar system: a dwarf planet called Ceres, which has
ice volcanoes, salt deposits, and other features that suggest it's hiding an ocean of salt water.
I
iced the bottom of a
large cake plate with green and brown frosting and stuck some of his toy dinosaurs around the
volcano to make it look like a scene from prehistoric times for my dinosaur obsessed son.
Subsequent, unusually
large and frequent eruptions of other
volcanoes, as well as sea -
ice / ocean feedbacks persisting long after the aerosols have been removed from the atmosphere, may have prolonged the cooling through the 1700s.
The flybys produced superb images of the surfaces of Jupiter's
large Galilean satellites, revealing sulphurous
volcanoes on Io,
ice chasms on Europa, huge ringed impact craters on Callisto, and polygonal dark regions on Ganymede.
The Triton moon orbiting Neptune, for instance, is nearly as
large as Earth's moon, though
ice volcanoes dispersed throughout the celestial body give off nitrogen frost, giving the moon a smoky appearance.
«There are two main «
ice» scenarios to consider;
ice - capped stratovolcanoes such as those that dominate the South American and Western USA;
volcanoes beneath
large ice sheets, such as those in Iceland and Antarctica.
The
large, glacier - clad
volcanoes also have «
ice - quakes», earthquakes that have similar seismograms to volcanic earthquakes but are due to the sudden slipping (of only a few inches) of a
large glacier.
Note that other
large eruptions occurred during the last 600 years, according to tree ring and
ice core data, but are not indicated here because the source
volcano is unknown (e.g. 1809).
Note that other
large eruptions occurred during the last 600 years, according to tree ring and
ice core data, but are not indicated here because the source
volcano is unknown (e.g. 1809).
Some mechanisms for that are hypothesized, e.g. methane release from polar regions, increased melting of Greenland leading to stopping the Gulf Stream, rapid reduction of Arctic sea -
ice and its positive feedback, collapse of Antarctic
ice shelves, loss of the Amazon,
large volcanoes, asteroid impacts, unexpected solar variation.
(A 2010 study found
large spikes in volcanic activity at a number of Iceland
volcanoes at the end of the last
ice age.
Effects of
large mega
volcanoes stay with the climate system for a long time through sea
ice feedbacks and ocean thermal inertia.
However, the cycle earlier than CET has an unusually
large excursion; the tree rings may have been contaminated by the severe cooling during the Little
Ice Age, caused likely by the very
large volcano explosions.