What does rapids mean? What is rapids?

1. Jet refers to a narrow strong wind zone with a wind speed of more than 30m/s. It is an important feature in atmospheric circulation. The jet stream belt observed on weather maps curves around the earth from west to east and extends for thousands of kilometers, with a horizontal width of about thousands of kilometers and a vertical thickness of several thousand to more than ten kilometers. According to the formation area and structure of the jet stream, it can be divided into polar front jet stream, subtropical jet stream, tropical easterly jet stream and polar night jet stream. According to the height at which jet streams appear, they can generally be divided into high-altitude jet streams and low-altitude jet streams.

2. Because the jet stream is related to the transport of atmospheric heat and angular momentum, it is an important link in global atmospheric circulation. Jet streams are often associated with frontal areas, so they are closely related to the occurrence and development of weather systems. The jet stream is one of the important research topics in meteorology.