The cause of foehn effect

Foehn is caused by the sinking of airflow after passing through the mountain. When a mass of air sinks from the sky to the ground, the temperature rises by 6.5℃ every time it drops 1000 meters. That is to say, when the air drops to the ground from the mountain with an altitude of 4000 meters to 5000 meters, the temperature will rise by more than 20℃, which will immediately heat up the cool climate.

Causes of foehn effect of extended data

Foehn is a unique weather phenomenon in mountainous areas. The formation of foehn in Taitung, Taiwan is that after the southwest airflow passes through the central mountain range, the water vapor is blocked and evaporated, forming a dry and hot foehn.

How many kinds of winds are there?

Wind is usually divided into breeze, breeze, gale, gale, storm and tornado.

In addition, there are sea breeze, land breeze, mountain breeze, valley breeze, foehn breeze, bitter breeze, cyclone and so on. The winds in the world can be roughly divided into two categories.

One is astronomical wind, called planetary wind system, which is the airflow born due to the rotation of the earth;

The other is local wind, which is caused by the earth's environment and is called local wind.

There are many kinds of local winds, the biggest of which is monsoon.

Monsoon is caused by the difference between land and sea, winter and summer.

In winter, the mainland is cold, the air pressure is high, the ocean is warm and the air pressure is low, so the air flow blows from the land to the ocean, and a dry and cold northwest wind blows;

In summer, the mainland is hot, the air pressure is low, the ocean is cool and the air pressure is high, so the air flow blows from the ocean to the land, and the southeast wind is hot and humid.