nasa noctilucent clouds
Turbulence occurs in fluids across the universe and the results will help scientists better model it in all systems. From about 80 kilometers above Earth's surface, the icy clouds can still reflect sunlight even though the Sun itself is below the horizon as seen from the ground. The cameras can also capture turbulence features as small as 18 m. (20 yards) wide.“We know the 2D wave structure from the images, but in order to fully describe the waves we need to measure the third dimension as well,” said Bernd Kaifler, the researcher at the German Aerospace Center, in Wessling, Germany, who designed the balloon’s lidar experiment. Thomas, an AIM co-Investigator, offers these highlights:These findings are new and important, but they don't yet unravel the central mysteries:What is ice doing in a rarefied layer of Earth's upper atmosphere that is one hundred million times dryer than air from the Sahara desert?AIM has just received a 3-year extension (from 2009 to 2012) to continue its studies.
Noctilucent clouds are not fully understood, which is why NASA launched the PMC Turbo mission. May 28, 2020: On May 17th, NASA's AIM spacecraft detected the first noctilucent clouds (NLCs) of summer. Could we find and repair the lunar rovers?Want to be part of the questions show? “At these altitudes you can literally see the gravity waves breaking — like ocean waves on the beach — and cascading to turbulence.”“We know the 2D wave structure from the images, but in order to fully describe the waves we need to measure the third dimension as well.” – Bernd Kaifler, German Aerospace Center.PMC Turbo’s unique mission design combines seven imaging systems which created a mosaic of wide views covering 100 miles across. They can’t be seen in daylight because they are too faint. The AIM satellite, launched in April 2007, is now in polar orbit where it can monitor the size, shape and icy make-up of NLCs. They are most often observed during the summer months from latitudes between 50° and 70° north and south of the Equator. Ask a short question on any video on my channel. “From the lidar measurements, we can infer the vertical structure of the waves, thus providing important data which would have not been available from the imaging experiment alone.”The PMC Turbo mission is part of a larger NASA endeavour to understand Earth’s atmosphere and weather. In July, 2018, NASA launched a five-day balloon mission, called PMC (Polar Mesospheric Clouds) Turbo, to observe them and photograph them.Noctilucent clouds are more properly called Polar Mesospheric Clouds, because they form in the mesosphere over the Earth’s poles. Noctilucent clouds, or night shining clouds, are tenuous cloud-like phenomena in the upper atmosphere of Earth. "Noctilucent clouds have not only persisted, but also spread."
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