Fri. Jan 21st, 2022


Leah Siegelman was While studying the swirling waters of the Southern Ocean surrounding Antarctica, he saw a poster image of a cyclone at Jupiter’s North Pole, taken by NASA. Juno spacecraft. “I looked at it, and I just got hurt: ‘Oh, it looks like the turmoil of the sea,'” he says.

So Siegelman, a researcher at the Scripps Institution of Oceanography in San Diego, looks at the latest details. Pictures Of the outer planet. He and his team have demonstrated for the first time that a kind of convection seen on Earth explains the physical energy and energy sources that cause cyclones on Jupiter. (Since both air and water are from the perspective of “liquid” physics, the same principles apply to gas giant atmospheres and our oceans.) They published their findings in the journal Today Nature Physics.

Jupiter, the 4-octillion-pound elephant in our solar system, creates massive cyclones, large storms that revolve around low pressure areas. Some thousands of miles wide বড় as large as the continental United States 250 wind storms of up to 250 miles per hour. The eight largest planets are found at the North Pole and five at the South Pole. Scientists have been speculating about their origin for years, but by mapping these storms and measuring their wind speed and temperature, Siegelman and colleagues have shown how they actually formed. Small whirlwinds pop up here and there in the swirling clouds – not so different from Siegelman’s familiar sea eddy – and then they begin to merge with each other. “Cyclones constantly hover over small clouds and draw energy from them to keep them moving,” he said.

This is a clever way to study extreme weather on a planet more than 500 million miles away. “The authors are clearly drawn from the branches of meteorology and oceanography. These people are carrying this rich literature and applying it in a sophisticated way on a planet we can hardly touch,” said Morgan O’Neill, a Stanford atmospheric scientist who studied hurricanes and tornadoes on Earth. Modeled and applied his work on Saturn 6

In particular, O’Neill says, the team of scientists shows how, like thunderstorms on Earth, Jupiter’s cyclones are created by a process with a rough-sounding name: “Moisture Circulation.” Warm, low-density air, deep in the planet’s atmosphere, rises slowly, while cold and dense air, near the icy void of space, moves downwards. This creates turmoil, which can be seen in Jupiter’s rolling, moisture-filled clouds of ammonia.

Photo: NASA / JPL-Caltech / SwRI / ASI / INAF / JIRAM



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