When we look at Jupiter, we see the top of it's atmosphere, and it's weather layer. The weather layer contains a lot of interesting features, such as jet streams, vortices, storms, and these things called "hot spots." Hot spots are basically like holes in the clouds, because they appear very dark in visible light, but in infrared light, they appear very bright. This indicates that we are seeing deeper down into warmer layers of the atmosphere. We've studied these hot spots with the Galileo Atmospheric Probe in 1995. The probe descended into Jupiter's atmosphere through a hot spot, taking measurements.
In 2000, a series of still images were compiled into time-lapse movies of Jupiter's atmosphere. In these movies, we can see Rossby waves that caused North-South meanderers in the jet stream. When looking at hot spots, we can see similar waves, but instead of moving North and South, they are moving up and down in the atmosphere. The downward portion of the wave pushes air down into warmer layers in the atmosphere, causing any clouds to evaporate and prevent other clouds from forming. These downward portions are believed to be the hot spots we see, which will help us better coordinate future probes sent to Jupiter.
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There are no signs of the drought ending in Italy in the foreseeable future.
Tropical Storm Nesat remains on track to barrel into Taiwan and southeastern China this weekend, while flooding rain associated with the future typhoon threatens to trigger more flooding in the Philippines.
As a strengthening storm system converges on the Atlantic coast, pockets of severe weather will develop in the eastern part of the United States into Friday evening.
A rare storm for late July will deliver drenching rain and miserable conditions to a large part of the mid-Atlantic and southern coast of New England to end the week and start the weekend.
Firefighters were gaining control of the massive wildfires raging across southeastern France on Thursday, but warned that the fire danger remains high.
Even though Hilary remains well away from the southwestern United States, the storm could still bring hazards to swimmers and surfers in the final days of July.