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my name is Amy Simon Miller and I study

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the atmospheres of the jovian planets

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whether on Jupiter is confined to a

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rather thin layer kind of high up in the

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atmosphere so the tops of the clouds are

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what we're seeing when we look at

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Jupiter one thing we're seeing in the

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southern part of the equatorial region

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is little v-shaped clouds or Chevron's

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and we wanted to understand how those

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are moving in the atmosphere what we

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think Chevron's are are simply holes in

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the clouds there are simply areas where

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we don't see any bright white clouds the

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Cassini mission flew by Jupiter in the

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year 2000 and because it was a slow

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distant flyby we got a lot of coverage

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of the planet over long time period so

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we were able to put those images

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together and make movies what we found

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by looking at the movies is that they're

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not just moving from east to west

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they're moving up and down tracing out

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what's called a Rossby wave we have

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these on earth as well in particular we

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see them around the poles they're

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circumpolar Jets and we can also see

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them in the jet streams at mid-latitudes

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destinies our earth typically flow from

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west to east but sometimes you can see

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them meandering from north to south and

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that's a signature of Rossby waves you

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know earth these meanders can sometimes

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grow stronger and that can lead to

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everyday weather changes such as the

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passage of fronts or storms being

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generated for most people what we really

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want to understand is weather on earth

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and what are the things that affect

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weather on earth now Jupiter and Earth

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are very different planets

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we don't have land and we don't have

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seasons on Jupiter on the other hand we

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see very similar weather phenomenon so

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being able to understand and study

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another planet teach us a lot more about