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Séminaire général du Département de physique

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Jovian Climate Change
Phil Marcus (Berkeley)

27 mai 2010

Eight years ago, we predicted that Jupiters 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 ten 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.

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Phil Marcus Phil Marcus (Berkeley)

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