"In winter, the air temperature above the sea ice can be below -20C, whereas the sea water is only about -1.9C. Heat flows from the warmer sea up to the very cold air, forming new ice from the bottom. The salt in this newly formed ice is concentrated and pushed into the brine channels. And because it is very cold and salty, it is denser than the water beneath. The result is the brine sinks in a descending plume. But as this extremely cold brine leaves the sea ice, it freezes the relatively fresh seawater it comes in contact with. This forms a fragile tube of ice around the descending plume, which grows into what has been called a
brinicle." A BBC film crew has recorded one of these
freezing life on the sea floor.
posted by cosmac
on Nov 23, 2011 -
47 comments
"I figured I'd explore for a bit and before I knew it I was 50 yards within a huge cave gazing at the most beautiful, otherworldly sight I had ever laid eyes on," he tells us. "It was like stepping into Superman's lair and every changing shade of blue lured me deeper and deeper."
Inside Glacier Caves. [more inside]
posted by Rinku
on Mar 9, 2011 -
20 comments
Ice House Detroit is an architectural installation and social change project wherein photographer Gregory Holm and architect Matthew Radune have spent weeks spraying water on an empty Detroit home.
[more inside]
posted by nevercalm
on Feb 2, 2010 -
8 comments
The Polar Discovery team has documented science in action from pole to pole during the historic 2007-2009 International Polar Year, and
covered five scientific expeditions. The science projects explored a range of topics from climate change and glaciers, to Earth’s geology, biology, ocean chemistry, circulation, and technology at the icy ends of the earth. Through
photo essays and
other multimedia, they explain how scientists collected data and what they discovered about the rapidly changing polar regions. From the awesome folks at
WHOI.
posted by netbros
on Nov 9, 2009 -
4 comments
On October 9th, NASA spacecraft will run into the moon, and on purpose. The
Lunar Crater Observation and Sensing Satellite (
LCROSS) and its rocket's
Centaur upper stage will impact the moon, with the goal of sending some of the (possibly present) ice above the lunar surface. Once out of the eternal shade of the moon's south pole, sunlight will break the ice up into H+ and OH- molecules, which can be detected by the
Lunar Reconnaissance Orbiter (
LRO). The
initial impact site was the crater Cabeus A, but the target was
later changed to Cabeus (proper), selected for highest hydrogen concentrations with the greatest level of certainty, and for the high-contrast back drop to detect ejecta and vapor measurements. NASA has provided
guides for amateur observations of the impact,
a facebook group, and
a Twitter feed so you don't miss the moment.
posted by filthy light thief
on Oct 8, 2009 -
53 comments
Blood Falls - The iron rich red liquid gushing from a buried Antarctica lake shows how life may have existed on a snowball Earth, or on Europa.
posted by Artw
on Apr 18, 2009 -
52 comments
If you were doing research in the 60s, You might've heard of Polywater, A form of water that exhibited wide variety of interesting characteristics and existed under identical conditions to that of normal water. Eventually debunked, none the less is a fascinating story. Naturally one draws parallels to Vonnegut's ice nine, but did you know there
actually is an ice nine? In fact, there's
twelve to sixteen types of ice,
depending on your opinion. More recently, computer simulations have indicated
water may structure itself into icosahedra, which, incredibly, is
the platonic solid (described over 2000 years ago!) representing the element water! And if you don't know what an icosahedron is,
I bet you've used one before. One of the most ubiquitous,
and arguably most important, substances in our lives, our
understanding of water is far from complete.
posted by Large Marge
on Apr 29, 2008 -
38 comments
The Last Iceberg suffers, as many photography sites do, from a mildly irritating flash interface; but if you can get over that fact, you'll see some genuinely amazing polar photography of isolated icebergs & ice shelves.
posted by jonson
on Nov 25, 2007 -
17 comments
Scientists have discovered a planet composed of
scorching hot ice. Originally thought to be a gas giant due to its mass, its actually only four times the size of Earth and most likely composed of exotic forms of ice, such as
Ice VII and Ice X with s surface temperature of 300° C.
posted by Artw
on May 16, 2007 -
30 comments
