U.S. climate change on Jupiter

27.04.2004

27.04.2004


—>


If a physicist at the University of California correctly imagines Jupiter, then there needs to happen soon global climate change and the disappearance of a number of large air flows. However, admirers of the Great Red Spot while there is nothing to fear. The most famous of Jupiter's vortices remain in place, not least due to the fact that is located close to the equator, says Philip Marcus. Marcus forecast is based on the initial knowledge on the fluid dynamics of Jupiter and the observations of the disappearance of many of the vortices on the giant planet. Scientists predict that the average temperature of the gas giant may change at 10 degrees Celsius, becoming above and below the equator to the poles. This temperature shift will make existing airflows unstable and spawn new ones.

According to Marcus, the changes complete the 70-year climate cycle of the planet. In the atmosphere of the planet, there are about a dozen threads that are moved to the east and west, and can reach speeds of over 530 kilometers per hour.

About 20 years ago, Marcus developed a computer model showing that the Great Red Spot, and there appeared as a result of chaotic turbulent processes in the atmosphere of Jupiter. His attempts to explain the dynamics of these processes and led to the current projections. He argues that the current 70-year cycle began with the formation in 1939 of three anticyclones — the White Ovals — to the south of the Great Red Spot. According to him, the first stage of the climate cycle involves the formation of stream band where the streams come into contact, twisting every which way — no two threads are twisted to one side, with each other not touching. Most streams slowly destroyed. In the second stage, some threads have become so weak that they fall into the so-called Rossby waves. In the same wave can get a lot of flow, where they can quite easily merge. These events Marcus refers noticed the disappearance of two of the White Ovals, one in 1997-1998. and the second in 2000, which was the "beginning of the end" of Jupiter's climate cycle.

Why the merger of vortices affect the temperature? According to Marcus, relatively uniform temperature over the entire surface of Jupiter is associated with the chaotic mixing of heat and airflow from the vortices. If a lot of vortices disappear, stop mixing air flow at this height. As a result, stops the transfer of heat from the equator to the poles. Then begins the divergence temperature in different parts of the world, which would be a sign of the third part of the climate cycle on Jupiter. Changes in temperature destabilize airflows that become uneven. As a result, they may begin to decay and the formation of new flows — the fourth stage of the climate cycle. At the fifth stage of the final new vortices decrease in size and will again form a band — moving to the next cycle.

Battery News, 14:09 26.04.2004
Source: NTR.ru

Like this post? Please share to your friends: