APOD: Clouds Near Jupiter's South Pole... (2016 Oct 25)

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APOD: Clouds Near Jupiter's South Pole... (2016 Oct 25)

Post by APOD Robot » Tue Oct 25, 2016 4:38 am

Image Clouds Near Jupiter's South Pole from Juno

Explanation: What's happening near the south pole of Jupiter? Recent images sent back by NASA's robotic Juno spacecraft are showing an interesting conglomeration of swirling clouds and what appear to be white ovals. Juno arrived at Jupiter in July and is being placed into a wide, looping orbit that will bring it near the gas giant -- and over its poles -- about twice a month. The featured image is a composite taken by JunoCam and post-processed by a digitally savvy citizen scientist. White ovals have been observed elsewhere on Jupiter and are thought to be giant storm systems. They have been observed to last for years, while typically showing Category 5 wind speeds of around 350 kilometers per hour. Unlike Earthly cyclones and hurricanes where high winds circle regions of low pressure, white ovals on Jupiter show rotational directions indicating that they are anticylones -- vortices centered on high pressure regions. Juno will continue to orbit Jupiter over thirty more times while recording optical, spectral, and gravitational data meant to help determine Jupiter's structure and evolution.

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Re: APOD: Clouds Near Jupiter's South Pole... (2016 Oct 25)

Post by Boomer12k » Tue Oct 25, 2016 5:09 am

Reminds me of a Julia Mandelbrot set....all swirly...

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Re: APOD: Clouds Near Jupiter's South Pole... (2016 Oct 25)

Post by Boomer12k » Tue Oct 25, 2016 5:10 am

Oh.... 2001:A Space Odyssey ....

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tje0058

Re: APOD: Clouds Near Jupiter's South Pole... (2016 Oct 25)

Post by tje0058 » Tue Oct 25, 2016 3:55 pm

Forget the white ovals Juno found at the south pole, what produces the pentagon shape with linear sides?

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Re: APOD: Clouds Near Jupiter's South Pole... (2016 Oct 25)

Post by ta152h0 » Tue Oct 25, 2016 7:34 pm

Makes me want to live longer to see what happens next
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Re: APOD: Clouds Near Jupiter's South Pole... (2016 Oct 25)

Post by MarkBour » Wed Oct 26, 2016 2:33 am

Looking down on our own atmosphere, what we mainly see made visible are cyclonic patterns. And (though I have no meteorological training), I think these patterns are made by air with moisture that is dropping down in the atmosphere. If on Jupiter the most visible motions are anticyclonic, does that mean that we are seeing phenomena that are "bubbling up" out of Jupiter, rather than precipitating down?
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Re: APOD: Clouds Near Jupiter's South Pole... (2016 Oct 25)

Post by neufer » Wed Oct 26, 2016 4:11 am

MarkBour wrote:
If on Jupiter the most visible motions are anticyclonic, does that mean that we are seeing phenomena that are "bubbling up" out of Jupiter, rather than precipitating down?
That's sort of the idea.

Cyclones represent convergent low pressure areas whereas
Anticyclones represent divergent high pressure areas.

(Note, however, that convergent low pressure areas at one atmospheric level
are often coupled with divergent high pressure areas at some other level.)
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Re: APOD: Clouds Near Jupiter's South Pole... (2016 Oct 25)

Post by Frahnkensteen » Wed Oct 26, 2016 4:27 pm

neufer wrote:
MarkBour wrote:
If on Jupiter the most visible motions are anticyclonic, does that mean that we are seeing phenomena that are "bubbling up" out of Jupiter, rather than precipitating down?
That's sort of the idea.

Cyclones represent convergent low pressure areas whereas
Anticyclones represent divergent high pressure areas.

(Note, however, that convergent low pressure areas at one atmospheric level
are often coupled with divergent high pressure areas at some other level.)
So...do these storms appear more like an hourglass in profile than a funnel, perhaps?

SeedsofEarth

Re: APOD: Clouds Near Jupiter's South Pole... (2016 Oct 25)

Post by SeedsofEarth » Thu Oct 27, 2016 6:12 pm

Any theories or postulations on what causes parts of the southern Jovian atmosphere to appear pea soup green?

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Re: APOD: Clouds Near Jupiter's South Pole... (2016 Oct 25)

Post by geckzilla » Thu Oct 27, 2016 6:50 pm

SeedsofEarth wrote:Any theories or postulations on what causes parts of the southern Jovian atmosphere to appear pea soup green?
Just the processing, if you ask me. The increase in saturation makes it look a bit greenish. Here's a less processed version from the Junocam outreach website: https://www.missionjuno.swri.edu/Vault/ ... 1474548709

It's darker and a bit greyish, really.
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Re: APOD: Clouds Near Jupiter's South Pole... (2016 Oct 25)

Post by Fred the Cat » Thu Oct 27, 2016 8:49 pm

The South pole is also "Unlike Anything Encountered in Solar System" except the opposite in color. :ssmile:
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