Vorticity and divergence at scales down to 200 km within and around the polar cyclones of Jupiter
International audience Since 2017 the Juno spacecraft has observed a cyclone at the north pole of Jupiter surrounded by eight smaller cyclones arranged in a polygonal pattern. It is not clear why this configuration is so stable or how it is maintained. Here we use a time series of images obtained by...
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Online Access: | https://insu.hal.science/insu-04472064 https://doi.org/10.1038/s41550-022-01774-0 |
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ftecoleponts:oai:HAL:insu-04472064v1 2024-06-09T07:48:27+00:00 Vorticity and divergence at scales down to 200 km within and around the polar cyclones of Jupiter Ingersoll, Andrew P. Ewald, Shawn P. Tosi, Federico Adriani, Alberto Mura, Alessandro Grassi, Davide Plainaki, Christina Sindoni, Giuseppe Li, Cheng Siegelman, Lia Klein, Patrice Young, William R. Laboratoire de Météorologie Dynamique (UMR 8539) (LMD) Institut national des sciences de l'Univers (INSU - CNRS)-École polytechnique (X)-École des Ponts ParisTech (ENPC)-Sorbonne Université (SU)-Centre National de la Recherche Scientifique (CNRS)-Département des Géosciences - ENS Paris École normale supérieure - Paris (ENS-PSL) Université Paris Sciences et Lettres (PSL)-Université Paris Sciences et Lettres (PSL)-École normale supérieure - Paris (ENS-PSL) Université Paris Sciences et Lettres (PSL)-Université Paris Sciences et Lettres (PSL) 2022 https://insu.hal.science/insu-04472064 https://doi.org/10.1038/s41550-022-01774-0 en eng HAL CCSD Nature Publishing Group info:eu-repo/semantics/altIdentifier/doi/10.1038/s41550-022-01774-0 insu-04472064 https://insu.hal.science/insu-04472064 BIBCODE: 2022NatAs.6.1280I doi:10.1038/s41550-022-01774-0 EISSN: 2397-3366 Nature Astronomy https://insu.hal.science/insu-04472064 Nature Astronomy, 2022, 6, pp.1280-1286. ⟨10.1038/s41550-022-01774-0⟩ [SDU]Sciences of the Universe [physics] info:eu-repo/semantics/article Journal articles 2022 ftecoleponts https://doi.org/10.1038/s41550-022-01774-0 2024-05-16T12:09:58Z International audience Since 2017 the Juno spacecraft has observed a cyclone at the north pole of Jupiter surrounded by eight smaller cyclones arranged in a polygonal pattern. It is not clear why this configuration is so stable or how it is maintained. Here we use a time series of images obtained by the JIRAM mapping spectrometer on Juno to track the winds and measure the vorticity and horizontal divergence within and around the polar cyclone and two of the circumpolar ones. We find an anticyclonic ring between the polar cyclone and the surrounding cyclones, supporting the theory that such shielding is needed for the stability of the polygonal pattern. However, even at the smallest spatial scale (180 km) we do not find the expected signature of convection—a spatial correlation between divergence and anticyclonic vorticity—in contrast with a previous study using additional assumptions about the dynamics, which shows the correlation at scales from 20 to 200 km. We suggest that a smaller size, relative to atmospheric thickness, of Jupiter's convective storms compared with Earth's, can reconcile the two studies. Article in Journal/Newspaper North Pole École des Ponts ParisTech: HAL Jupiter ENVELOPE(101.133,101.133,-66.117,-66.117) North Pole Nature Astronomy 6 11 1280 1286 |
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English |
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[SDU]Sciences of the Universe [physics] |
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[SDU]Sciences of the Universe [physics] Ingersoll, Andrew P. Ewald, Shawn P. Tosi, Federico Adriani, Alberto Mura, Alessandro Grassi, Davide Plainaki, Christina Sindoni, Giuseppe Li, Cheng Siegelman, Lia Klein, Patrice Young, William R. Vorticity and divergence at scales down to 200 km within and around the polar cyclones of Jupiter |
topic_facet |
[SDU]Sciences of the Universe [physics] |
description |
International audience Since 2017 the Juno spacecraft has observed a cyclone at the north pole of Jupiter surrounded by eight smaller cyclones arranged in a polygonal pattern. It is not clear why this configuration is so stable or how it is maintained. Here we use a time series of images obtained by the JIRAM mapping spectrometer on Juno to track the winds and measure the vorticity and horizontal divergence within and around the polar cyclone and two of the circumpolar ones. We find an anticyclonic ring between the polar cyclone and the surrounding cyclones, supporting the theory that such shielding is needed for the stability of the polygonal pattern. However, even at the smallest spatial scale (180 km) we do not find the expected signature of convection—a spatial correlation between divergence and anticyclonic vorticity—in contrast with a previous study using additional assumptions about the dynamics, which shows the correlation at scales from 20 to 200 km. We suggest that a smaller size, relative to atmospheric thickness, of Jupiter's convective storms compared with Earth's, can reconcile the two studies. |
author2 |
Laboratoire de Météorologie Dynamique (UMR 8539) (LMD) Institut national des sciences de l'Univers (INSU - CNRS)-École polytechnique (X)-École des Ponts ParisTech (ENPC)-Sorbonne Université (SU)-Centre National de la Recherche Scientifique (CNRS)-Département des Géosciences - ENS Paris École normale supérieure - Paris (ENS-PSL) Université Paris Sciences et Lettres (PSL)-Université Paris Sciences et Lettres (PSL)-École normale supérieure - Paris (ENS-PSL) Université Paris Sciences et Lettres (PSL)-Université Paris Sciences et Lettres (PSL) |
format |
Article in Journal/Newspaper |
author |
Ingersoll, Andrew P. Ewald, Shawn P. Tosi, Federico Adriani, Alberto Mura, Alessandro Grassi, Davide Plainaki, Christina Sindoni, Giuseppe Li, Cheng Siegelman, Lia Klein, Patrice Young, William R. |
author_facet |
Ingersoll, Andrew P. Ewald, Shawn P. Tosi, Federico Adriani, Alberto Mura, Alessandro Grassi, Davide Plainaki, Christina Sindoni, Giuseppe Li, Cheng Siegelman, Lia Klein, Patrice Young, William R. |
author_sort |
Ingersoll, Andrew P. |
title |
Vorticity and divergence at scales down to 200 km within and around the polar cyclones of Jupiter |
title_short |
Vorticity and divergence at scales down to 200 km within and around the polar cyclones of Jupiter |
title_full |
Vorticity and divergence at scales down to 200 km within and around the polar cyclones of Jupiter |
title_fullStr |
Vorticity and divergence at scales down to 200 km within and around the polar cyclones of Jupiter |
title_full_unstemmed |
Vorticity and divergence at scales down to 200 km within and around the polar cyclones of Jupiter |
title_sort |
vorticity and divergence at scales down to 200 km within and around the polar cyclones of jupiter |
publisher |
HAL CCSD |
publishDate |
2022 |
url |
https://insu.hal.science/insu-04472064 https://doi.org/10.1038/s41550-022-01774-0 |
long_lat |
ENVELOPE(101.133,101.133,-66.117,-66.117) |
geographic |
Jupiter North Pole |
geographic_facet |
Jupiter North Pole |
genre |
North Pole |
genre_facet |
North Pole |
op_source |
EISSN: 2397-3366 Nature Astronomy https://insu.hal.science/insu-04472064 Nature Astronomy, 2022, 6, pp.1280-1286. ⟨10.1038/s41550-022-01774-0⟩ |
op_relation |
info:eu-repo/semantics/altIdentifier/doi/10.1038/s41550-022-01774-0 insu-04472064 https://insu.hal.science/insu-04472064 BIBCODE: 2022NatAs.6.1280I doi:10.1038/s41550-022-01774-0 |
op_doi |
https://doi.org/10.1038/s41550-022-01774-0 |
container_title |
Nature Astronomy |
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6 |
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11 |
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1280 |
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1286 |
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