Swirls Above the Southern Ocean
In the Southern Ocean, obstacles are sparse. But the ice-cloaked volcano of Peter I Island is tall enough at over 1600 meters to disrupt the wind. (Image credit: M. Garrison; via NASA Earth Observatory)
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Swirls Above the Southern Ocean
In the Southern Ocean, obstacles are sparse. But the ice-cloaked volcano of Peter I Island is tall enough at over 1600 meters to disrupt the wind. (Image credit: M. Garrison; via NASA Earth Observatory)

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Sky Waves NASA’s Landsat 8 satellite captured this image of an interesting striped sky over the Indian Ocean. The pattern seen here is the result of ‘mountain wave’ clouds, which form when clouds pass over a raised landform. The landform in this instance is the remote destination of Amsterdam Island, a volcanic island formed around 300,000 years ago, with a peak of 867 metres (2,844 feet) above sea level. The high peaks on Amsterdam Island can interrupt the air passing overhead, pushing some of the air up into the atmosphere. This rising air is cooled, and subsequently clouds are formed through condensation. However, the rest of the air, which was not forced to rise, remains warm and too low in the atmosphere for cloud formation. These clouds tend to be stationary, and will hang around until another weather pattern of mass of air breaks up the party. The result of this continual, but intermittent, rising of air is a ripple-like pattern that resembles ocean waves. -Jean Image courtesy of NASA Earth Observatory
Michael Pisaro — Nature Denatured and Found Again (Gravity Wave)
Nature Denatured and Found Again by Michael Pisaro
Let’s start small; Nature Denatured and Found Again is a document of five summers well spent. In the summer of 2011 Michael Pisaro, an American composer, educator, and musician associated with the Wandelweiser composers collective, traveled to Neufelden, Austria to join artist Joachim Eckl at a former storehouse called Die Station (The Station). It is situated near the Grosse Mühl, a small river that empties into the Danube. Decorated with items culled from movie sets and an old Hilton hotel, it houses some of Eckl’s work and provides living and studio space for visiting artists, who mix with each other and townspeople in encounters intended to realize Joseph Beuys’ concept of “social sculpture” (in a nutshell, the idea that people gathering together can collectively change society through art).
From Astronomy Picture of the Day; March 6, 2018:
Colorful Airglow Bands Surround Milky Way Xiaohan Wang
Why would the sky glow like a giant repeating rainbow? Airglow. Now air glows all of the time, but it is usually hard to see. A disturbance however -- like an approaching storm -- may cause noticeable rippling in the Earth's atmosphere. These gravity waves are oscillations in air analogous to those created when a rock is thrown in calm water. Red airglow likely originates from OH molecules about 87-kilometers high, excited by ultraviolet light from the Sun, while orange and green airglow is likely caused by sodium and oxygen atoms slightly higher up. While driving near Keluke Lake in Qinghai Provence in China, the photographer originally noticed mainly the impressive central band of the Milky Way Galaxy. Stopping to photograph it, surprisingly, the resulting sensitive camera image showed airglow bands to be quite prominent and span the entire sky. The featured image has been digitally enhanced to make the colors more vibrant.
Strange Structure Spotted On Venus
Venus is already very weird planet. After greenhouse effect, extreme temperatures, and pressures, dense clouds with crazy rotation speed, now the scientist noticed something new. The strange and unknown structure has been spotted on Venus stretching for 10,000 kilometers in the clouds of its atmosphere. To be even stranger this structure resist the sulfuric clouds, regardless they are spinning faster than the planet itself. Scientists now try to explain it and they have some interesting assumptions.
The atmosphere of Venus is composed primarily of carbon dioxide with sulfuric acid clouds that spins faster that the planet. It is the hottest object after Sun in our Solar System.
Gravity Waves Lighting Up Venus Atmosphere
Last December the camera of Japan’s Akatsuki spacecraft first time spotted anomalies in the upper atmosphere. Scientists from Rikkyo University in Tokyo published their findings in Nature. They captured the area in infrared images and measured that pockets stretching for 10,000 kilometers above the mountainous region of Venus. There has been a lot of speculations about this. However, the best guess is that it’s some sort of gravity wave.
Images taken over four days from Akatsuki showed the wave staying in roughly the same place. ©Planet-C
Gravity waves are not gravitational waves. A gravity wave is a wave propagated on a liquid surface or in a fluid through the effects of gravity. So, it is a common thing on rocky planets. Earth example of such waves is the one above The Andes in Patagonia.
What is strange about this Venus gravity wave is that scientist didn’t expect that these waves could forms so high in the atmosphere. Yet, only a massive gravity wave can resist the rotation speed of acid clouds. And the fact that the structure is formed above the Venus mountains proves it even more.
Illustration of surface winds on Venus being pushed up by a mountain, causing tension in the upper atmosphere that slows the high-altitude winds. Credit: ESA
The research team claims that study clearly shows the evidence of the existence of stationary gravity waves. Further, the research reveals that such stationary gravity waves can have a very large scale. This one on Venus is perhaps the greatest ever observed in the Solar System.
#GravityWave, #Venus https://outoftheboxscience.com/space/solar-system/strange-structure-spotted-venus/

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Bullseye
The Cumbre Vieja volcano in the Canary Islands began erupting in mid-September 2021. This satellite image, captured October 1st, shows a peculiar bullseye-like cloud over the volcano. (Image credit: L. Dauphin; via NASA Earth Observatory) Read the full article
Meteotsunamis, or meteorological tsunamis, are large waves driven by weather rather than seismic energy. Although they occur along shorelines throughout the world, forecasters have very little infrastructure in place to predict or detect them. (Image credit: D. Maglothin; research credit: E. Anderson and G. Mann; via Gizmodo)
Where waves crash and meet, turbulence is inevitable. But exactly how large waves interact -- whether in the ocean, in plasma, or the atmosphere -- is far from understood. (Image credit: ocean waves - M. Power, others - A. Cazaubiel et al.; research credit: A. Cazaubiel et al.; via APS Physics; submitted by Kam-Yung Soh)