When we see patterns in the atmosphere from space, they tend to be in the clouds of powerful storms. These all have roughly the same form: they look like a spiral galaxy with arms spinning out from the core.
But meteorologists have detected other organizational principles at work. Like, take the fascinating image above. It shows …. well, I wasn’t sure exactly what it showed. A meteorologist’s blog post described them as “convectively-generated mesospheric airglow waves,” but that did not quite explain how they worked or what they were.
So I got in touch with Steven Miller, senior research scientist and deputy director of the Cooperative Institute for Research in the Atmosphere (CIRA) at Colorado State University. Miller and his colleagues discovered these concentric rings while working with the newish satellite Suomi satellite’s next-generation low-light sensor. (They published a paper on the discovery in PNAS.)
Miller told me I was looking at glowing ripples in the atmosphere itself!
“These are literally ‘ripples of glowing atmosphere’ whose structure is the result of a train of gravity waves that is passing through a thin layer of the atmosphere that produces a very faint veil of light called ‘nightglow,’” he said. “These are not clouds (although they were forced by the thunderstorms below), and they do not occur in the troposphere, where our ‘weather’ is. They are much higher up—at the interface between the mesosphere and the thermosphere—about 90 km [55 miles] above the surface! The glow is revealing important dynamics of our atmosphere that would otherwise be completely invisible to us.”
Read more. [Image: Suomi]
Mom, this might be my last chance to tell you I love you.
A text from a high school student who was aboard the ferry that capsized today off South Korea’s southern coast. Four passengers were killed, 55 were injured and more than 280 are missing. (via latimes)
In Compton last year, police began quietly testing a system that allowed them to do something incredible: Watch every car and person in real time as they ebbed and flowed around the city. Every assault, every purse snatched, every car speeding away was on record—all thanks to an Ohio company that monitors cities from the air.
The Center for Investigative Reporting takes a look at a number of emerging surveillance technologies in a new video, but one in particular stands out: A wide-area surveillance system invented by Ross McNutt, a retired Air Force veteran who owns a company called Persistent Surveillance Systems.
McNutt describes his product as “a live version of Google Earth, only with TiVo capabilities,” which is intriguing but vague (and also sounds a lot like the plot of this terrible Denzel movie). More specifically, PSS outfits planes with an array of super high-resolution cameras that allow a pilot to record a 25-square-mile patch of Earth constantly—for up to six hours.
It’s sort of similar to what your average satellite can do—except, in this case, you can rewind the video, zoom in, and follow specific people and cars as they move around the grid. It’s not specific enough to ID people by face, but, when used in unison with stoplight cameras and other on-the-ground video sources, it can identify suspects as they leave the scene of a crime.
The PSS system has been tested in cities including Baltimore and Dayton, and, last year, police officers in Compton used it to track crimes, including a necklace snatching. In one case, they could track a criminal as he approached a woman, grabbed her jewelry, and then ran to a getaway car. They eventually drove out of frame, which meant they weren’t caught—but, as the Compton police explain in this video, the system told them that this particular car was involved, at the very least.
Plenty of critics argue the technology is an ominous invasion of privacy: Video surveillance free of any traditional technological barriers, tracking everyone and everything that moves in a city. But according to police and its creators, it’s not as invasive as other systems, because it can’t see into homes or identify faces. It “allows us to provide more security with less loss of privacy than any of the other options that are out there,” says one officer. That’s definitely one way to look at it.
CultureSOUL: Vintage *African American* Barbershops
The Great Migration era.
"Somewhere along the way, R&B got lost—gatekeepers have recycled sounds and not kept up, musicianship has declined,“ she says. ”I really did want to make one of the greatest R&B albums of this year, but I want to innovate as well."