The Origin of Jupiter's Great Red Spot
Fuente:
arXiv
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| Autori principali: | , , , , , |
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| Natura: | Preprint |
| Pubblicazione: |
2024
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| author | Sánchez-Lavega, Agustín García-Melendo, Enrique Legarreta, Jon Miró, Arnau Soria, Manel Ahrens-Velásquez, Kevin |
| author_facet | Sánchez-Lavega, Agustín García-Melendo, Enrique Legarreta, Jon Miró, Arnau Soria, Manel Ahrens-Velásquez, Kevin |
| contents | Jupiter's Grat Red Spot (GRS) is the largest and longest-lived vortex of all solar system planets but its lifetime is debated and its formation mechanism remains hidden. G. D. Cassini discovered in 1665 the presence of a dark oval at the GRS latitude, known as the "Permanent Spot" (PS) that was observed until 1713. We show from historical observations of its size evolution and motions that PS is unlikely to correspond to the current GRS, that was first observed in 1831. New numerical simulations rule out that the GRS formed by the merging of vortices or by a superstorm, but most likely formed from a flow disturbance between the two opposed Jovian zonal jets north and south of it. If so, the aearly GRS should have had a low tangential velocity so that its rotation velocity has increased over time as it shrunk. |
| format | Preprint |
| id |
arxiv_https___arxiv_org_abs_2406_13222 |
| institution | arXiv |
| publishDate | 2024 |
| record_format | arxiv |
| spellingShingle | The Origin of Jupiter's Great Red Spot Sánchez-Lavega, Agustín García-Melendo, Enrique Legarreta, Jon Miró, Arnau Soria, Manel Ahrens-Velásquez, Kevin Earth and Planetary Astrophysics Jupiter's Grat Red Spot (GRS) is the largest and longest-lived vortex of all solar system planets but its lifetime is debated and its formation mechanism remains hidden. G. D. Cassini discovered in 1665 the presence of a dark oval at the GRS latitude, known as the "Permanent Spot" (PS) that was observed until 1713. We show from historical observations of its size evolution and motions that PS is unlikely to correspond to the current GRS, that was first observed in 1831. New numerical simulations rule out that the GRS formed by the merging of vortices or by a superstorm, but most likely formed from a flow disturbance between the two opposed Jovian zonal jets north and south of it. If so, the aearly GRS should have had a low tangential velocity so that its rotation velocity has increased over time as it shrunk. |
| title | The Origin of Jupiter's Great Red Spot |
| topic | Earth and Planetary Astrophysics |
| url | https://arxiv.org/abs/2406.13222 |