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.
Check out that BBC website link for more information on how the Frozen Planet videographers captured this footage. That's also where you should go to watch the video when this YouTube version is inevitably taken down.
Caltech theoretical physicist Sean Carroll, author of Something Deeply Hidden: Quantum Worlds and the Emergence of Spacetime, explains the concept of a “dimensions” at five different levels of complexity. Dr. Carroll sure has a big brane.
In 1936, the Tasmanian tiger (Thylacinus cynocephalus) was declared to be extinct. Yet in the last three years, there have been eight reported sightings according to Tasmania’s Department of Primary Industries, Parks, Water and Environment. I hope it’s true. From CNN: While stories abound that some continue to live in the remote wilds of Tasmania, […]
Who doesn’t love a free meal? From Nautilus Live: During the final dive of this year’s Nautilus expedition season, our team discovered a whale fall while exploring Davidson Seamount off central California’s coast with researchers from Monterey Bay National Marine Sanctuary. The skeletal remains of the whale lying on its back are estimated to be […]
Treat yourself, internet: We’ve rounded up some deals from the past week that were too good not to bring back for an encore. Take your pick from home goods, massagers and other tech, all at serious discounts. TREBLAB Z2 Bluetooth 5.0 Noise-Cancelling Headphones Get in the groove and stay that way with these headphones and […]
As cool as your smartphone is, it can’t do everything. When a job requires a little elbow grease, a multitool is a great thing to have around – and might just save your life in the right situation. Here’s a roundup of some of the latest multitool designs, which have come a long way since […]
Whether you own or rent your place, insurance on that home is a necessary hassle – but a new tech-driven company called Lemonade is starting to show that while it might indeed be a necessity, it doesn’t have to be a hassle. Here’s the way insurance typically works: You pay premiums and hope an accident […]