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New 12C/13C and 14N/15N isotopic ratio measurements in Jupiter's stratosphere revealed by ALMA
C. Lefour, T. Cavalié, R. Moreno +4
The collision of comet SL9 with Jupiter in 1994 changed the chemical composition of the Jovian stratosphere for decades. New molecules were detected minutes after the impacts (HCN,…
Detection of stratospheric HCN and tropospheric CO in Uranus and the implication for their sources
T. Cavalié, R. Moreno, C. Lefour +16
Uranus belongs to the category of ice giants that are common in our Galaxy. However, Uranus is one of the least explored and understood planets in our Solar System. This work aims…
Observations of the temporal evolution of Saturn's stratosphere following the Great Storm of 2010-2011. II. Latitudinal distribution of CO and stratospheric winds
T. Cavalié, R. Moreno, C. Lefour +8
Saturn's Great Storm of 2010-2011 has produced two stratospheric hot spots, the "beacons," that eventually merged to produce a gigantic one in April and May 2011. This beacon pertu…
Surveying exogenous species in Saturn with ALMA I. Detecting and Mapping CO
Deborah Bardet, Thierry Fouchet, Thibault Cavalié +5
The origin of carbon monoxide (CO) in Saturn's stratosphere remains uncertain, with proposed sources including internal thermochemical production, cometary impacts, and exogenic ma…
The Polar Stratosphere of Jupiter
Vincent Hue, Thibault Cavalié, James A. Sinclair +13
Observations of the Jovian upper atmosphere at high latitudes in the UV, IR and mm/sub-mm all indicate that the chemical distributions and thermal structure are broadly influenced…
Storms and convection on Uranus and Neptune: impact of methane abundance revealed by a 3D cloud-resolving model
Noé Clément, Jérémy Leconte, Aymeric Spiga +8
Uranus and Neptune have atmospheres dominated by molecular hydrogen and helium. In the upper troposphere, methane is the third main molecule and condenses, yielding a vertical grad…