95 citations · 521 across the 19 of their papers we have counts for
19 papers
Spatiotemporal Variations of Temperature in Jupiter's Upper Atmosphere
Kate Roberts, Luke Moore, James O'Donoghue +5
Global temperatures in Jupiter's upper atmosphere are poorly constrained. Other than an in situ measurement by the Galileo Probe, all temperature data come from remote sensing meth…
Infrared Characterisation of Jupiter's Equatorial Disturbance Cycle
Arrate Antuñano, Leigh N. Fletcher, Glenn S. Orton +6
We use an infrared dataset captured between 1984 and 2017 using several instruments and observatories to report five rare equatorial disturbances that completely altered the appear…
Saturn's Atmosphere in Northern Summer Revealed by JWST/MIRI
Leigh N. Fletcher, Oliver R. T. King, Jake Harkett +8
Saturn's northern summertime hemisphere was mapped by JWST/MIRI (4.9-27.9 m) in November 2022, tracing the seasonal evolution of temperatures, aerosols, and chemical species in…
Saturn's Seasonal Variability from Four Decades of Ground-Based Mid-Infrared Observations
James S. D. Blake, Leigh N. Fletcher, Glenn S. Orton +8
A multi-decade record of ground-based mid-infrared (7-25 m) images of Saturn is used to explore seasonal and non-seasonal variability in thermal emission over more than a Saturn…
Refining Saturn's deuterium-hydrogen ratio via IRTF/TEXES spectroscopy
James S. D. Blake, Leigh N. Fletcher, Thomas K. Greathouse +7
The abundance of deuterium in giant planet atmospheres provides constraints on the reservoirs of ices incorporated into these worlds during their formation and evolution. Motivated…
Meridional variations of CH in Jupiter's stratosphere from Juno UVS observations
Rohini S. Giles, Thomas K. Greathouse, Vincent Hue +10
The UVS instrument on the Juno mission records far-ultraviolet reflected sunlight from Jupiter. These spectra are sensitive to the abundances of chemical species in the upper atmos…
The upper atmospheres of Uranus and Neptune
Henrik Melin
We review the current understanding of the upper atmospheres of Uranus and Neptune, and explore the upcoming opportunities available to study these exciting planets. The ice giants…
Jupiter in the ultraviolet: acetylene and ethane abundances in the stratosphere of Jupiter from Cassini observations between 0.15 and 0.19 m
Henrik Melin, Leigh N. Fletcher, Pat G. J. Irwin +1
At wavelengths between 0.15 and 0.19 m, the far-ultraviolet spectrum of Jupiter is dominated by the scattered solar spectrum, attenuated by molecular absorptions primarily by ac…
Ice Giant Systems: The Scientific Potential of Orbital Missions to Uranus and Neptune
Leigh N. Fletcher, Ravit Helled, Elias Roussos +27
Uranus and Neptune, and their diverse satellite and ring systems, represent the least explored environments of our Solar System, and yet may provide the archetype for the most comm…
Jupiter's Atmospheric Variability from Long-Term Ground-based Observations at 5 microns
Arrate Antuñano, Leigh N. Fletcher, Glenn S. Orton +7
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…
Modelling H in planetary atmospheres: effects of vertical gradients on observed quantities
L. Moore, H. Melin, J. O'Donoghue +5
Since its discovery in the aurorae of Jupiter ~30 years ago, the H ion has served as an invaluable probe of giant planet upper atmospheres. However, the vast majority of…
Assessing the long-term variability of acetylene and ethane in the stratosphere of Jupiter
Henrik Melin, L. N. Fletcher, P. T. Donnelly +6
Acetylene (CH) and ethane (CH) are both produced in the stratosphere of Jupiter via photolysis of methane (CH). Despite this common source, the latitudinal dist…
The quest for H at Neptune: deep burn observations with NASA IRTF iSHELL
H. Melin, L. N. Fletcher, T. S. Stallard +4
Emission from the molecular ion H is a powerful diagnostic of the upper atmosphere of Jupiter, Saturn, and Uranus, but it remains undetected at Neptune. In search of this emi…
Jupiter's North Equatorial Belt expansion and thermal wave activity ahead of Juno's arrival
L. N. Fletcher, G. S. Orton, J. A. Sinclair +13
The dark colors of Jupiter's North Equatorial Belt (NEB, N) appeared to expand northward into the neighboring zone in 2015, consistent with a 3-5 year cycle of activity…
Uranus' aurorae past equinox
L. Lamy, R. Prangé, K. C. Hansen +9
The aurorae of Uranus were recently detected in the far ultraviolet with the Hubble Space Telescope (HST) providing a new, so far unique, means to remotely study the asymmetric Ura…
Detection of H3+ auroral emission in Jupiter's 5-micron window
Rohini S. Giles, Leigh N. Fletcher, Patrick G. J. Irwin +2
We use high-resolution ground-based observations from the VLT CRIRES instrument in December 2012 to identify sixteen previously undetected H3+ emission lines from Jupiter's ionosph…
Conjugate observations of Saturn's northern and southern H3+ aurorae
James O'Donoghue, Tom S. Stallard, Henrik Melin +7
We present an analysis of recent high spatial and spectral resolution ground-based infrared observations of H3+ spectra obtained with the 10-metre Keck II telescope in April 2011.…
The domination of Saturn's low latitude ionosphere by ring `rain'
J. O'Donoghue, T. S. Stallard, H. Melin +5
Saturn's ionosphere is produced when the otherwise neutral atmosphere is exposed to a flow of energetic charged particles or solar radiation. At low latitudes the latter should res…
Multi-spectral simultaneous diagnosis of Saturns aurorae throughout a planetary rotation
L. Lamy, R. Prangé, W. Pryor +6
From the 27th to the 28th January 2009, the Cassini spacecraft remotely acquired combined observations of Saturns southern aurorae at radio, ultraviolet and infrared wavelengths, w…