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Showing 1–4 of 4 results
Advanced filters: Author: Pascal Rannou Clear advanced filters

  • JWST and Keck II spectral observations of Saturn’s moon Titan reveal methyl (CH3) as well as non-local thermodynamic equilibrium emission bands of CO and CO2. Imaging shows clouds in Titan’s northern hemisphere at several epochs, with some appearing to evolve in altitude.

    • Conor A. Nixon
    • Bruno Bézard
    • Robert A. West
    Research
    Nature Astronomy
    Volume: 9, P: 969-981

  • Titan's detached haze, a distinct layer on top of the main haze that provides a measure of the seasonal activity in the mesosphere, disappeared from 2012–2016, after equinox. Studying this transition will help us understand the dynamical and microphysical processes at work.

    • Robert A. West
    • Benoît Seignovert
    • Aida Ovanessian
    Research
    Nature Astronomy
    Volume: 2, P: 495-500

  • Clouds on Titan result from the condensation of methane and ethane and, at present, cloud activity mainly occurs in the southern hemisphere; general circulation models predict that this distribution should change with the seasons on a 15-year timescale. Now, global spatial cloud coverage on Titan is reported to be in general agreement with the models.

    • Sébastien Rodriguez
    • Stéphane Le Mouélic
    • Phil D. Nicholson
    Research
    Nature
    Volume: 459, P: 678-682

  • Low atmospheric temperatures during the Martian aphelion freeze water ice in the troposphere which is then cold trapped and unable to transit up into the mesosphere, according to a radiative transfer model and cloud microphysics simulations

    • Daniel Toledo
    • Pascal Rannou
    • Jose Antonio Rodriguez-Manfredi
    ResearchOpen Access
    Communications Earth & Environment
    Volume: 5, P: 1-8