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Small-scale waves were observed along the boundary between Jupiter's North Equatorial Belt and North Tropical Zone, ~16.5{\deg} N planetographic latitude in Hubble Space Telescope data in 2012 and throughout 2015 to 2018, observable at all…

The dark colors of Jupiter's North Equatorial Belt (NEB, $7-17^\circ$N) appeared to expand northward into the neighboring zone in 2015, consistent with a 3-5 year cycle of activity in the NEB. Inversions of thermal-IR imaging from the Very…

We study the spatial and temporal variability in Jupiter's atmosphere by comparing longitude-resolved brightness temperature maps from the Very Large Array (VLA) radio observatory and NASA's Juno spacecraft Microwave Radiometer (MWR) taken…

Earth and Planetary Astrophysics · Physics 2024-12-31 Joanna Hardesty , Chris Moeckel , Imke de Pater

We observed Jupiter at wavelengths near 2 cm with the Karl G. Jansky Very Large Array in February 2015. These frequencies are mostly sensitive to variations in ammonia abundance and probe between ~0.5-2.0 bars of pressure in Jupiter's…

Earth and Planetary Astrophysics · Physics 2017-01-23 Richard Cosentino , Bryan Butler , Bob Sault , Raul Morales-Juberias , Amy Simon , Imke de Pater

This article presents a synopsis of the activity in Jupiter's North Equatorial Belt (NEB) from 1986 to 2010, and of the speeds of dark formations on its south edge and bright streaks ('rifts') in its interior. In particular I discuss NEB…

Earth and Planetary Astrophysics · Physics 2017-07-12 John H. Rogers

We present multi-wavelength measurements of the thermal, chemical, and cloud contrasts associated with the visibly dark formations (also known as 5-$\mu$m hot spots) and intervening bright plumes on the boundary between Jupiter's Equatorial…

Paper I described the normal features of the North Equatorial Belt (NEB) in recent years, especially the large dark formations which are thought to represent waves in the prograde jet on the NEB south edge (NEBs, 7N), and the NEB expansion…

Earth and Planetary Astrophysics · Physics 2018-09-27 John H. Rogers

Jupiter's weather layer exhibits long-term and quasi-periodic cycles of meteorological activity that can completely change the appearance of its belts and zones. There are cycles with intervals from 4 to 9 years, dependent on the latitude,…

Earth and Planetary Astrophysics · Physics 2023-05-23 Kumiko Hori , Chris A. Jones , Arrate Antuñano , Leigh N. Fletcher , Steven M. Tobias

Juno Microwave Radiometer (MWR) observations of Jupiter's mid-latitudes reveal a strong correlation between brightness temperature contrasts and zonal winds, confirming that the banded structure extends throughout the troposphere. However,…

Earth and Planetary Astrophysics · Physics 2021-10-28 L. N. Fletcher , F. A. Oyafuso , M. Allison , A. Ingersoll , L. Li , Y. Kaspi , E. Galanti , M. H. Wong , G. S. Orton , K. Duer , Z. Zhang , C. Li , T. Guillot , S. M. Levin , S. Bolton

A compact wave pattern has been identified on Jupiter's fastest retrograding jet at 20S (the SEBs) on the southern edge of the South Equatorial Belt. The wave has been identified in both reflected sunlight from amateur observations between…

Earth and Planetary Astrophysics · Physics 2016-05-26 J. H. Rogers , L. N. Fletcher , G. Adamoli , M. Jacquesson , M. Vedovato , G. S. Orton

We observed Jupiter four times over a full rotation (10 hrs) with the upgraded Karl G. Jansky Very Large Array (VLA) between December 2013 and December 2014. Preliminary results at 4-17 GHz were presented in de Pater et al. (2016); in the…

Earth and Planetary Astrophysics · Physics 2019-02-21 I. de Pater , R. J. Sault , M. H. Wong , L. N. Fletcher , D. DeBoer , B. Butler

Jupiter's banded structure undergoes strong temporal variations, changing the visible and infrared appearance of the belts and zones in a complex and turbulent way due to physical processes that are not yet understood. In this study we use…

Over the last eight years, a rich dataset of mid-infrared CH4 observations from the TEXES instrument at IRTF has been used to characterize the thermal evolution of Jupiter's stratosphere. These data were used to produce vertically-resolved…

Earth and Planetary Astrophysics · Physics 2020-06-30 Rohini S Giles , Thomas K Greathouse , Richard G Cosentino , Glenn S Orton , John H Lacy

We report on results of an observing campaign to support the Juno mission. At the beginning of 2016, using TEXES (Texas Echelon cross-dispersed Echelle Spectrograph), mounted on the NASA Infrared Telescope Facility (IRTF), we obtained data…

The intriguing circumpolar cyclone pattern at Jupiter's poles raises fundamental questions about how these systems are organized vertically and, further, how the planet's internal heat shapes and sustains them in the absence of solar…

Jupiter's atmosphere-interior is a coupled fluid dynamical system strongly influenced by the rapid background rotation. While the visible atmosphere features east-west zonal winds on the order of 100 m/s (Tollefson et al. 2017), zonal flows…

Earth and Planetary Astrophysics · Physics 2023-12-11 Hao Cao , Jeremy Bloxham , Ryan S. Park , Burkhard Militzer , Rakesh K. Yadav , Laura Kulowski , David J. Stevenson , Scott J. Bolton

Jupiter's gravity field observed by NASA's Juno spacecraft indicates that the density in the 10--100 GPa region is lower than one would expect from a H/He adiabat with 0.5-5x solar water abundance as has been observationally inferred in…

Earth and Planetary Astrophysics · Physics 2025-04-02 Nadine Nettelmann , Jonathan J. Fortney

The transition region between the North Equatorial Band (NEBn) and North Tropical Zone (NTrZ) in Jupiter is home to convective storms, systems of cyclones and anticyclones and atmospheric waves. A large anticyclone formed in the year 2006…

Global maps of Jupiter's atmospheric temperatures, gaseous composition and aerosol opacity are derived from a programme of 5-20 $\mu$m mid-infrared spectroscopic observations using the Texas Echelon Cross Echelle Spectrograph (TEXES) on…

Earth and Planetary Astrophysics · Physics 2017-06-14 L. N. Fletcher , T. K. Greathouse , G. S. Orton , J. A. Sinclair , R. S. Giles , P. G. J. Irwin , T. Encrenaz

We present a detailed analysis of Jupiter's X-ray (0.2-10 keV) auroral emissions as observed by XMM-Newton in Nov. 2003 and compare it with that of an Apr. 2003 observation. We discover the existence of an electron bremsstrahlung component…

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