Infrared image of Jupiter’s northern hemisphere as seen by Jerram. attributed to him: natural astronomy (2022). DOI: 10.1038 / s41550-022-01774-0
A team of multi-institutional space scientists in the United States, working with a colleague from Italy and one from France, used modeling to partly explain the resilience of hurricanes orbiting around Jupiter’s poles. In their paper published in the magazine natural astronomythe group describes how they analyzed images taken by the Juno space probe and used what they learned to create models of shallow waters that may explain at least in part how hurricanes last so long.
In 2016, NASA’s Juno space probe entered orbit around Jupiter. Unlike other probes, it orbited the planet from pole to pole, not around the equator. When the probe began sending back images of the planet from this new perspective, the researchers who looked at it found it surprising. Not only was there one hurricane sitting over each of the poles, but both were surrounded by more hurricanes. Over time, more images of the poles arrived and the researchers who studied them continued to be amazed at the stability of the hurricanes – the original images are still there today and their shape has not changed. Such behavior is unheard of here on Earth of course – hurricanes form, move around for some time and then dissipate. This behavior has left researchers scrambling to come up with a reasonable explanation for what they observed.
Images of the planet’s north pole show that there are eight cyclones surrounding the central cyclone directly above the pole. all eight in Close to They are all approximately equal distances from the center tornadoArranged in an octagonal pattern. At this time, it is not clear whether the tornadoes are spinning around the center. There is a similar arrangement in the south columnThere are only five tornadoes, shaped like a pentagon. In this new effort, researchers have tried a new approach to explain how hurricanes stay in place for so long, and how they do so without changing their position or shape.
Vortex and divergence are derived from two independent wind determinations. attributed to him: natural astronomy (2022). DOI: 10.1038 / s41550-022-01774-0
The team’s work included analyzing images and other data from Juno probelooking specifically at wind speeds and direction. Then they took what they learned and used it to create models of shallow water, leading them to suggest a “counter-vortex ring” of wind moving in the opposite direction to hurricanes, which is what keeps them in place. And while that may be true, the team was unable to find signs of convection, which would have helped explain how heat is used to fuel hurricanes. They acknowledge that there is a lot of work to be done to fully explain the behavior of Jupiter Tornadoes.
Andrew B. Ingersoll et al., Vortex and divergence at ranges of up to 200 km in and around Jupiter’s polar cyclones, natural astronomy (2022). DOI: 10.1038 / s41550-022-01774-0
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