Saturn atmospheric dynamics one year after Cassini: Long-lived features and time variations in the drift of the Hexagon

  title={Saturn atmospheric dynamics one year after Cassini: Long-lived features and time variations in the drift of the Hexagon},
  author={Ricardo Hueso and Agust'in S'anchez-Lavega and J. F. Rojas and Amy A. Simon and T L Barry and Teresa del R'io-Gaztelurrutia and Arrate Antu{\~n}ano and Kunio M. Sayanagi and Marc Delcroix and Leigh N. Fletcher and Enrique Garc'ia-Melendo and Santiago P'erez-Hoyos and John J. Blalock and Florent Colas and J. M. G'omez-Forrellad and Jacob L. Gunnarson and Damian A. Peach and M. H. Wong},
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Midsummer Atmospheric Changes in Saturn’s Northern Hemisphere from the Hubble OPAL Program
Using the Hubble Space Telescope, Saturn was observed in 2018, 2019, and 2020, just after the northern hemisphere summer solstice. Analysis of multispectral imaging data reveals three years of cloud
Interaction of Saturn’s Hexagon With Convective Storms
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Evolution of the Horizontal Winds in Jupiter's Great Red Spot From One Jovian Year of HST/WFC3 Maps
We measured the horizontal winds in Jupiter's Great Red Spot (GRS) using data from the WFC3/UVIS instrument on board the Hubble Space Telescope (HST). The data cover 11 epochs from 2009 to 2020.
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The weather layers of the gas giant planets, Jupiter and Saturn, comprise the shallow atmospheric layers that are influenced energetically by a combination of incoming solar radiation and localised
Multilayer hazes over Saturn’s hexagon from Cassini ISS limb images
A system of multi-layered hazes above Saturn’s hexagonal-wave cloud tops in the visual range is analyzed, suggesting the formation to be caused by condensation processes, and the vertical distribution of stacked layers by the upward propagation of internal gravity waves.
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Deep rotating convection generates the polar hexagon on Saturn
A three-dimensional (3D) fully nonlinear anelastic simulation of deep thermal convection in the outer layers of gas giant planets that spontaneously generates giant polar cyclones, fierce alternating zonal flows, and a high-latitude eastward jet with a polygonal pattern is presented.
Recent contributions of amateur astronomers to the study of planetary atmospheres from Venus to Neptune
During the last two decades amateur contributions to professional publications in the field of planetary astronomy have increased exponentially [1-2]. Technical advancements in instrumentation and


The Global Atmospheric Circulation of Saturn
Over the past decade, the Cassini spacecraft has provided an unprecedented observational record of the atmosphere of Saturn, which in many ways now surpasses Jupiter as the best-observed giant
Deep winds beneath Saturn’s upper clouds from a seasonal long-lived planetary-scale storm
Observations of a storm at northern latitudes in the peak of a weak westward jet during the beginning of northern springtime, in accord with the seasonal cycle but earlier than expected, and triggered a planetary-scale disturbance that circled Saturn but did not significantly alter the ambient zonal winds.
Saturn's Zonal Winds at Cloud Level
We present an analysis of new cloud motion measurements in Saturn's atmosphere from Voyager 1 and 2 images and define a nominal zonal wind velocity vs latitude profile for the cloud top level that
Equatorial winds on Saturn and the stratospheric oscillation
The zonal jets on the giant planets have been thought to be stable in time. A decline in the velocity of Saturn’s equatorial jet has been identified, on the basis of a comparison of cloud-tracking
The Voyager flybys of Saturn in 1980–1981 revealed a circumpolar Hexagon at ~78° north planetographic latitude that has persisted for over 30 Earth years, more than one Saturn year, and has been