Mobile phone weather in tourism transformation

Friends who like to travel basically choose to travel by plane, which is faster and more convenient. Tibet, as a domestic tourist hotspot, is naturally the best choice, but why don't most planes fly over Tibet? ?

There are many real-time plane images around Tibet on the map, but the sky above is deserted. The plane seems to have bypassed this place in unison, and even if the straight line distance is very short, it would rather choose a detour. Why is this? Mainly due to the following reasons:

1. Geographical location of Tibet

First of all, the Qinghai-Tibet Plateau is characterized by high altitude and long mountains. It is the largest wasteland except Antarctica and northern Greenland. Its geographical position is very special, with endless mountains, even extending to14,0 km. The mountains in Tibet are very high, and Mount Everest lies between Nepal and Tibet. There are many mountains with an average elevation above 20,000 feet. Although most commercial planes can be higher than mountains, if the plane passes directly above, there is a great possibility of hitting the mountains. It can be said that the conditions of high mountains limit the flight of many planes.

In addition, if the plane flies too low, it may also trigger an avalanche in the mountain area, which will do harm to life in this area.

Secondly, the Himalayas make the surrounding environment unpredictable, the weather unpredictable, and the jet fuel on the plane is easy to freeze. If you fly for more than 6 hours, you will encounter great trouble and a series of dangers.

2. Safety factors and emergency treatment

First of all, because the mountain is too high, the weather on it changes quickly. In case of emergency, the plane can't find the landing site at all, and the oxygen supply on the plane is very limited. Passengers must land to a distance of 1000 feet within 20 minutes before they can breathe normally. The falling height means that it is easy to hit the mountain and lead to danger.

Second, the problem of fuel freezing. Jet plane is the mainstream passenger plane today, which can fly at high altitude. If you fly at such a high altitude above the Himalayas for a long time, the fuel may freeze below MINUS 47 degrees. Moreover, in this area, the aircraft can't avoid fuel freezing by lowering the altitude. Once the fuel is frozen, unpredictable troubles and dangers will occur.

Third, in case of accidents and emergencies, you need to land. This is a terrible place. You will collapse in the mountains. If the aircraft cabin loses pressure, the general procedure is to descend to the height with breathable oxygen. If this happens in Tibet, you are likely to fall into the mountains. If an engine is lost, most descent procedures need to descend to about 20,000 feet. At this height, you will hit the mountain.

In Tibet, however, there is little room for fault handling. When the plane encounters a decompression incident, it needs to descend to a safe altitude below 3048 meters in a short time. Engine failure also needs to be reduced to such a low height. But in Tibet, this is very "beyond our power", so in the event of a fault, the disposal space of the aircraft is very limited. In addition, although Tibet has a vast territory, there are few spare airports. The landforms here are diverse, with many mountains and few plains. In an area of about 250,000 square nautical miles, only Lhasa-Gongga and Kathmandu airports can transit. If the plane encounters an accident or emergency in flight, it is difficult to find a chance to land temporarily, and it may be killed before flying to the airport.

3. Passenger factor?

Tibet Mountain is too high. Everyone who travels to Tibet will consider one factor: altitude sickness. This is because the average altitude here has reached more than 4000 meters, which is called the "roof of the world". If the average altitude alone is not enough to hinder the navigation of aircraft, it is important that the Himalayas stand here, and the highest peak of the Himalayas, Mount Qomolangma, is also in this area. There are more than 100 peaks over 7200 meters above sea level. This means that in order to fly over Tibet smoothly, the available flying height of the aircraft will be calculated from FL3 10(9400 meters).

4. Regional economic factors

There are not many major tourist centers in and around the Qinghai-Tibet Plateau. So there is no need to fly over Tibet. On the other hand, other routes are quite mature, and few flights have to fly over Tibet/Himalayas. ?

5. Climate factors

The probability of atmospheric turbulence in the Himalayas in Tibet is relatively high, and turbulence will be very clear because of small pollution. It is difficult for radar to identify these clear turbulence, and it is also difficult for pilots to find it in time. Once encountering turbulence, the plane will fall into turbulence. Atmospheric turbulence is an irregular movement, which will enhance the vertical and horizontal exchange of momentum, heat, water vapor and pollutants in the atmosphere, interfere with the propagation of light waves, sound waves and electromagnetic waves, and also affect the flight of aircraft, including aircraft performance, flight safety and passenger comfort.

Clear-sky turbulence in atmospheric turbulence is a big problem in flight. It is not easy to detect, even if it does not cause a vicious flight accident, it is likely to cause personal injury.

To sum up, it is the reason why the plane will bypass Tibet instead of flying directly.