Strange Skies
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Better Earth

Midnight sun: Night-shining clouds light up dark skies of Britain

Noctilucent clouds in england
© Mark Humpage/ swns.com'Noctilucent' or 'night-shining' clouds form at the outer limits of the upper atmosphere and reflect the sun's light long after it has gone down over the horizon.
With the sun dappled across these white clouds and a deep blue sky, it appears dawn is about to break.

But this remarkable photograph of an English rural landscape near was taken at midnight and shows the rare phenomenon of 'night shining.'

The shimmering clouds form at an altitude of around 55 miles above sea level and are made up of tiny ice droplets. Because they are so high up in the atmosphere the sun is able to illuminate the clouds from below the horizon.

Called 'noctilucent' clouds, which literally means 'night-shining' in Latin, they are normally spotted in polar regions during the summer months.

But stunned residents spotted a rare glimpse of the clouds lighting up Leicester's skyline shortly after midnight on Thursday morning.

Comment: Notice the twist pointing once again to man-made global warming. However, a more plausible explanation is an increasing accumulation of cosmic dust at the highest altitudes. Especially disturbing is that the composition of this dust suggest the earth is entering a debris-filled region of space, upping the odds of a catastrophic collision with extraterrestrial objects. We would recommend a careful reading of the Comets and Catastropes series, starting here.


Telescope

Strange Clouds at the Edge of Space

When in space, keep an eye on the window. You never know what you might see.

Last month, astronauts on board the International Space Station (ISS) witnessed a beautiful display of noctilucent or "night-shining" clouds. The station was located about 340 km over western Mongolia on July 22nd when the crew snapped this picture:

Image
©NASA
Noctilucent clouds photographed by the crew of the ISS: more.

Magnify

Polar Ice Clouds May Be Climate Change Symptom

As the late summer sun sets in the Arctic, bands of wispy, luminescent clouds shine against the deep blue of the northern sky.

To the casual observer, they may simply be a curiosity, dismissed as the waning light of the midnight sun. But to scientists, these noctilucent ice clouds could be an upper-atmospheric symptom of a changing climate.

©Richard Collins, UAF Geophysical Institute
Noctilucent clouds shine in the dark portion of the sky in this image taken from the Poker Flat Research Range in 2005.

Cloud Lightning

"Night-shining" clouds bring mystery; Once confined to Earth's poles, the bizarre clouds have now been spotted above central Colorado

Since their discovery 120 years ago, strangely luminescent clouds called noctilucent clouds have been creeping slowly toward the equator.

©Denver Post
This hauntingly beautiful noctilucent cloud was photographed over the Juneau, Alaska, ice field in 1998. Once confined to Earth's poles, the clouds have been spotted above Colorado.

Question

A mystery: NASA satellite captures first view of 'night-shining' clouds

A NASA satellite has captured the first occurrence this summer of mysterious iridescent polar clouds that form 50 miles above Earth's surface.

The first observations of these clouds by the Aeronomy of Ice in the Mesosphere (AIM) satellite occurred above 70 degrees north on May 25. Observers on the ground began seeing the clouds on June 6 over northern Europe. AIM is the first satellite mission dedicated to the study of these unusual clouds.

These mystifying clouds are called Polar Mesospheric Clouds, or PMCs, when they are viewed from space and referred to as "night-shining" clouds, or noctilucent clouds, when viewed by observers on Earth. The clouds form during the Northern Hemisphere's summer season that begins in mid-May and extends through the end of August. They are being seen by AIM's instruments more frequently as the season progresses. The clouds also are seen in the high latitudes of the Southern Hemisphere during the summer months.

Very little is known about how these clouds form over the poles, why they are being seen more frequently and at lower latitudes than ever before, or why they have been growing brighter. AIM will observe two complete polar mesospheric cloud seasons over both poles, documenting for the first time the entire, complex life cycle of PMCs.

Comment: The article starts out by assuming it's a change in the atmosphere that's creating the clouds, but then later on says, "The Cosmic Dust Experiment is recording the amount of space dust that enters Earth's atmosphere to help scientists assess the role this dust plays in PMC formation." So which is it? Could the dust be a pre-swarm indicator?

If so, the dust would have to come from particles big enough not to be blasted out by the solar wind, implying that small meteors are responsible which would explain the increasing number of fireballs seen worldwide in the past few years. It's all speculation, but the point is not to assume that it's an atmospheric change only.


Cloud Lightning

NASA Mission to Explore Noctilucent Clouds

Two hundred seventy thousand feet above the ground, higher than 99.9 percent of the earth's air, clouds still float around - thin, iridescent wisps of electric blue.

NASA is launching a small satellite to take a closer look at these clouds at the edge of outer space and to try to understand why, in recent years, they are appearing more often over more parts of the world. They are also becoming brighter.

©Ed Lu/NASA
Noctilucent clouds are more easily seen from space as this photograph from the International Space Station shows. Since 1980, satellite observations show the number of noctilucent clouds increasing about 28 percent per decade. The ice crystals in the clouds also appear to be getting bigger, with the brightness of the clouds rising about 7 percent per decade.

Telescope

Satellite to study source of 'night shining' clouds

Iridescent, silvery blue clouds at the edge of space that may be connected to global warming will be studied by a NASA spacecraft set to launch on 25 April.

©Hampton University
Noctilucent clouds were first observed in 1885, two years after the Krakatoa eruption. But most volcanic eruptions do not spew material high enough in the atmosphere to seed the formation of the icy clouds

The Aeronomy of Ice in the Mesosphere (AIM) mission will be the first satellite dedicated to studying the enigmatic phenomenon of "noctilucent", or night-shining clouds.