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Jeudi 27 mai
Résumé : Eight years ago, we predicted that Jupiter’s weather patterns would change
abruptly - starting in 2006. In December 2005, Jupiter developed (for the
first time in its 350 years of observations) a second, large "Red Spot". Since
then, much of Jupiter’s atmosphere has been in upheaval. We review the
calculations upon which our predictions were made, illustrate key features of
the dynamics of the vortices in the Jovian atmosphere, and show how current
and past observations can be used to quantify Jupiter’s changes ; for example,
we show that the Great Red Spot has decreased by about 20% over the last 10
years. We explain the physics of the color change that led to the new, second
"Red Spot". We conclude with new calculations that predict changes during
the coming year, and we speculate about the long-term variability of Jupiter’s
climate.
RECRUTEMENT ACCES DIRECT
Le département de physique
Fête de la Science 2018 