High pressure detailed data collection

High air pressure refers to the place higher than the surrounding air pressure, and the place with the highest air pressure is called the "high air pressure center". Near the high pressure center in the northern hemisphere, the wind blows outward in the form of a right-handed vortex, so the air in this part is relatively thin. By the way, the air falls from the sky and forms a downward airflow, so it is usually good weather.

Basic introduction Chinese name: high pressure mbth: high pressure? Pressure abbreviation: high pressure attribute: meteorological application: weather classification: definition and classification of dynamic high pressure and thermal high pressure. The abbreviation of "high pressure" refers to the place where the air pressure is higher than the surrounding area, and the place with the highest air pressure is called "high pressure center". At the same height, the atmospheric vortex with the central air pressure higher than the surrounding air pressure is called "high pressure" or "high pressure" for short. Usually, the high pressure near the ground is studied. High-pressure air flows (diverges) around from the center. Due to the influence of the earth's rotation, it flows clockwise in the northern hemisphere and counterclockwise in the southern hemisphere. High pressure is also called anticyclone, but the former is named after the pressure field and the latter is named after the airflow field (opposite to the vortex direction). There is no front in the high pressure area. Due to the divergence of airflow and the supplement of high altitude subsidence, the temperature rises and the relative humidity decreases during the subsidence process, resulting in cloudy, rainy and windy weather in some areas. It can be classified into dynamic high pressure and thermal high pressure according to the causes. Such as subtropical high and continental cold high. According to different thermal structures, it can be divided into cold high pressure and warm high pressure. For example: continental cold high pressure, tropical ocean air mass. High pressure can be divided into two types according to its thermal structure: the most common is cold high pressure, which is caused by surface heat dissipation and cooling. After the surface temperature drops, the air temperature near the surface also drops, and the cold air lacks heat energy, so it is difficult to rise. It is heavier and denser air, and the surrounding air is warmer and lighter, so the air flow changes from cold air to the surrounding direction, forming a cold high-pressure center. For example, the high pressure in Antarctica and Siberia. The subtropical high is caused by the strong updraft at the equator, which forms the upper air pressure and flows in the direction of low pressure from south to north. Because of the geostrophic bias, these air flows from the equator gradually turn from west to east, no longer move along the meridian direction, and accumulate and sink near 30 degrees north and south latitude, forming a high pressure and being relatively hot. At present, the testing institutions that can carry out high air pressure are Yitong testing laboratory, environmental reliability and electromagnetic compatibility testing center, etc.