Jupiter’s atmosphere was finally understood


Numerous publications on Jupiter’s atmosphere filled newspaper columns Geophysical research letter, Science And Geophysical Research Journal: Planets. Together, they make it possible to understand Jupiter’s atmosphere in an unprecedented way: its 3D structure in convection cells and Jet streams The real size of the deep and glorious Great Red Spot and other surface rotations … In the wake of these synchronous releases, several international teams of physicists explained the latest observation data from the Juno study and put it into orbit around the gas giant. July 5, 2016.

?? It’s like opening a treasure chest “, Miracles for Phys.org Lori Claes, director of the Department of Planetary Sciences at NASA. We understand that: Since Jupiter’s orbit in July 2016, this study has provided physicists with more accurate data than ever on the gas giant. Analyzes of this data were published this week in the form of six articles, which were published in three major journals: Science (In the Papers), Geophysical research letter (In the Contributions), and Geophysical Research Journal: Planets (In the articles themselves)

But what data clarifies the nature of the pea pulp that Jupiter contains? First, microwaves, these electromagnetic waves have a wavelength of 1mm to 1m. During Juno’s 37 orbits at a distance of 4,200 km from the surface of the gas giant, its onboard instruments have collected valuable information, including through its microwave radiometer – a remote sensing device that measures energy emitted by different molecules and makes it possible. Draw the vertical profile of their abundance, despite the (very) harsh weather that reigns on the surface of the Jovian atmosphere.

The jovian atmosphere is designed in 3D

Second, 3D models of the behavior of Jupiter’s atmosphere are important for analyzing the signals collected by Juno. For example, it determined the optimal atmospheric model to explain the distribution of ammonia – the NH4OH molecule – on the origin of the odor and the toxicity of urine on Jupiter. ” The atmosphere has been shown to be made up of thermosetting cells, such as iron cells. “, details Phys.org Karen Duer, researcher at the Weissman Institute of Science and co-author of one of the publications.

The ammonia distribution anomalies found in Jupiter’s atmosphere (in b, the red areas are rich in ammonia, the blue areas are poor) are similar to the anomalies predicted by the convection model, like wild cells. (in c). In a, the vertical wind used in the model (rising in red, falling in green). © Duer et al./ Letters from geophysical research

These ferrule-shaped convection cells – the Earth’s atmosphere between latitudes 30-60 and 60, orbiting an air cycle – are shown in blue in the article’s title image. Finally, beneath these convection cells are powerful laminar currents called jet streams, certainly in the form of Jupiter bands.

Beyond its powerful obstacles, Jupiter’s atmosphere is known for its magnificent bands of color that stretch from east to west. Juno had previously determined that they were powerful jets flying at speeds of up to 500 km / h. But now the researchers have a clue as to the birth of these horizontal bands: They originate from laminar jets deep under Jovian convection cells.

A big red dot far from the surface

Another highly anticipated result concerns Jupiter’s famous big red dot. First observed by Cassini in 1665, this giant anticyclone is larger than the diameter of the Earth.

?? Juno surprised us by giving clues that Jupiter’s atmosphere was deeper than expected. 2, explains Phys.org Scott Bolton, Juno is in charge of the mission. Recent discoveries clearly confirm this: according to the analysis of density anomalies in the Jovian atmosphere, the big red dot is erupting at a depth of at least 500 kilometers! But it’s also the largest of the vortices on Jupiter’s surface – rotating thunderstorms.

Jupiter red spot
The Great Red Spot was moved by Juno (with two multicolored lines) to help clarify its composition. © Parisi et al./Science

Typically, the eddies turn into monstrous storms hundreds of miles thick, which pierce the ice of the gas giant and even the depth of water condensation in a dark abyss. The object’s position changes, but the vortex continues!

?? We call this significant depth the Jovicline, which refers to the Earth’s thermocline. [limite assez abrupte entre les eaux superficielles chaudes et les eaux profondes froides des océans] Said Leigh Fletcher, one of the main scientists involved in the study. In other words, on Jupiter, the clouds change position (except to fill up with ammonia)! Just like the earth’s ocean cycle and the atmospheric cycle coexist.

Jupiter orbiting the atmosphere
The water condenses from 5-10 bars, but the vortex system lasts. © Bolton et al. / Science
Source: Sciences


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