Seasonal variability in the ionosphere of Uranus

Details Seasonal variability in the ionosphere of Uranus Seasonal variability in the ionosphere of Uranus

Oct 2011

adsabs.harvard.edu/cgi-bin/nph-data_query?bibcode=2011epsc.conf..824m&link_type=abstract

EPSC-DPS Joint Meeting 2011, held 2-7 October 2011 in Nantes, France. http://meetings.copernicus.org/epsc-dps2011, p.824

Physics

Scientific paper

Ground based infrared observations of the H+3 ionosphere of Uranus, spanning 16 years, have been analysed as to identify any long-term trends in temperature and density. Between 1992 and 2008, the temperature is seen decreasing by 8 K per year, between 715 K and 534 K. With equinox occurring in 2007, the cooling of the atmosphere appears linked to seasonal geometry with respect to the Sun, even though the Sun alone cannot not provide enough energy to heat the planet to the observed temperatures. The mechanism that is responsible for heating the planet is therefore likely linked to conductivity, regulated by nightside relaxation of the ionosphere.

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