What is the wind force today?

On June 65438+1October 1 1 day, 2020, an easterly wind of grade 3-4 occurred in Guangdong today.

Wind is a natural phenomenon on the earth, which is caused by solar radiation heat. Sunlight shines on the earth's surface, causing the surface temperature to rise, and the surface air to expand and become lighter and lighter. After the hot air rises, the cold air with low temperature flows in horizontally, and the rising air falls down because it gradually cools and becomes heavier. Because the surface temperature is high, it will heat up the air, and this airflow will produce wind.

Scientifically speaking, wind often refers to the horizontal motion component of air, including direction and size, that is, wind direction and wind speed; But for flight, it also includes vertical motion components, so-called vertical or ascending and descending airflow. Strong winds can move objects and their directions (mass of matter). The wind is very fast.

Expanding the data, some scientists began to study whether the warming earth will bring more powerful and harmful tropical storms. Most meteorologists believe that the earth seems to be getting hotter and hotter. They think that carbon dioxide and so-called greenhouse gases in the atmosphere are warming the earth.

Researchers warn that people must seriously think about the problem of global climate change decades or even centuries later. It should be pointed out that a weather and climate event, such as a strong hurricane or an active hurricane season, does not mean global warming. Typhoon is a strong storm that occurs in the tropical oceans of the northwest Pacific Ocean and the South China Sea. A hurricane is an air vortex that rotates around its center in the atmosphere and moves forward at the same time.

It rotates counterclockwise in the northern hemisphere and clockwise in the southern hemisphere. Meteorology calls the vortex in the atmosphere a cyclone, because the vortex in the hurricane atmosphere is produced on the surface of the tropical ocean, so it is called a tropical cyclone.