Traditional Culture Encyclopedia - Weather inquiry - In June, a high temperature of 35.8 degrees occurred in Gu Lin, Sichuan 165438+ 10? What caused this?
In June, a high temperature of 35.8 degrees occurred in Gu Lin, Sichuan 165438+ 10? What caused this?
It is understood that foehn is a kind of dry-hot wind formed by the increase of temperature and the decrease of humidity when the air sinks adiabatically. Foehn often appears on the leeward slope of mountains, which is a form of local air movement caused by mountains. The airflow on the mountain sinks on the leeward slope and becomes a dry and hot local wind. In the high pressure area, air sinking will also produce foehn.
According to the relevant person in charge of Luzhou Meteorological Observatory, foehn is a kind of dry-hot wind caused by rising temperature and decreasing humidity when the air sinks adiabatically, which is a unique weather phenomenon in mountainous areas. ? 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℃ on average every time it drops 1000 meters. When the air drops to the ground from the mountain at an altitude of 4,000 to 5,000 meters, the temperature will rise by more than 20℃, causing the cool temperature to rise suddenly. ?
Foehn can be seen in many mountainous areas in the world, but the Alps in Europe, the Rocky Mountains in America and the Caucasus Mountains in the former Soviet Union are the most famous. Strong burning wind can scorch leaves, crack the land and lead to severe drought. Burning wind can sometimes bring benefits to people. Lighter burning wind can increase local heat and make corn and fruit trees mature ahead of time, so the residents of the Caucasus and Tashkent oasis in the former Soviet Union simply call it "? Corn wind? . The rocky mountains in North America have deep snow in winter. When it is windy in spring, all the snow will melt in a short time. The land is covered with lush grass, which provides pasture for livestock, so the locals call it? Snow eater? .
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