The secrets of night shining clouds
2012 06 20

By Shireen Gonzaga | EarthSky.org



After sunset, when the sun is below the horizon but visible from the clouds’ high altitude, sunlight illuminates them, causing them to glow in a dark night sky.

Glowing silver-blue clouds that sometimes light up summer night skies in polar regions, after sunset and before sunrise, are called noctilucent clouds. Scientists studying these clouds, using data from NASA’s AIM (Aeronomy of Ice in the Mesosphere) satellite have found that year-to-year changes in noctilucent clouds are closely linked to weather and climate across the globe. One major discovery they’ve made is that weather conditions in one hemisphere can have a profound effect on the other hemisphere.

Also known as night shining clouds, noctilucent clouds form in the highest reaches of the atmosphere called the mesosphere, as much as 50 miles (80 km) above the Earth’s surface. They’re usually seen during summer in polar regions. After sunset or before sunrise, when the sun is below the ground horizon but visible from the high altitude of noctilucent clouds, sunlight illuminates these clouds, causing them to glow in the dark night sky. Noctilucent clouds are thought to be made of ice crystals that form on fine dust particles from meteors; they can only form when temperatures are incredibly low and when there’s water available to form ice crystals.

[...]

NASA’s AIM (Aeronomy of Ice in the Mesosphere) satellite has been observing noctilucent clouds since 2007, gathering data that will help scientists understand the characteristics of these extreme high altitude clouds that are closely linked to weather and climate across the globe.



A composite image, taken by AIM, of noctilucent clouds above the Southern Pole on December 31, 2009. Image credit: NASA/HU/VT/CU LASP



Noctilucent clouds over the Southern Hemisphere on January 30, 2010, taken by an astronaut aboard the International Space Station. Image credit: NASA.



[...]

Read the full article at: earthsky.org
Top Image: Source: EarthSky.orgNoctilucent clouds, Soomaa National Park, Estonia. Image credit: Martin Koitmäe via Wikimedia Commons.






Video from: YouTube.com








Related Articles
Bizarre, Giant Tubular Cloud Rolling Across the Sea
World’s Pyramids Beaming Energy To Mysterious Space Cloud
Giant Tsunami-Shaped Clouds Roll Across Alabama Sky
Lightning bolts illuminate the ash cloud from the Puyehue-Cordon Caulle volcanic chain in Chile (img)
CERN Experiment Confirms Cosmic Rays Influence Clouds - Global Warming Next?
Bizarre cloud behaviour - high altitude winds? Space weather? (Video 2)
Bizarre cloud behaviour - high altitude winds? Space weather? (Video 1)
Interesting Clouds over Kansas City
Mysterious cloud formations (Video)


Latest News from our Front Page

13 years ago this man was accused of abusing 18 girls in Rotherham - so why are police only NOW acting on the claims?
2014 09 02
Comment: As this story finally is getting more and more coverage, let’s expose these sick perverts for what they are and get to the root of the problem that enabled horrors like this to not only go unnoticed for such a long time, but also to the heart of why people in law and government denied it and decided to ...
Harvard Professor Noel Ignatiev talks about how to end the White race
2014 09 02
There was some doubt earlier this week as to the validity of the claim in Kevin MacDonald’s article The War Against Whites. We’ll we found something for your guys: Source: youtube.com Not that this is the only one, far from it, this is just a small sample of the barrage of conferences and a well educated cultural marxists that have set their goals ...
Secret underground tunnels of ancient Mesopotamian cult revealed under Ani ruins
2014 09 01
For the first time in history, the academic world is paying attention to the spectacular underground world of Ani, a 5,000-year-old Armenian city located on the Turkish-Armenian border. Hurriyet Daily News reports that scientists, academics, and researchers have just met at a symposium in Kars titled ‘Underground Secrets of Ani’ to discuss the city’s underground world mentioned in ancient ...
A Government Vision Of The Future That Isn’t That Great
2014 09 01
Here’s a report by the UK Ministry of Defense, a document that they’re not hiding - it’s not classified. In fact, they WANT you to read it: the Global Strategic Trends 2045. For your convenience, they’ve even produced a handy video about their dire predictions: They present a warning call for how things are going to be bad in the future. ...
Bad Memories Turned to Happy Ones in Mice Brains
2014 09 01
Memories are often associated with emotions, and these feelings can change through new experiences and over time. Now, using light, scientists have been able to manipulate mice brain cells and turn the animals’ fearful memories into happy ones, according to a new study. Memories are encoded in groups of neurons that are activated together or in specific patterns, but it is ...
More News »