The difference between cold wave and cold air

I know the difference between cold wave and cold air is as follows:

First, the nature is different.

1, cold wave: it is a natural weather phenomenon.

2. Cold air: It is a kind of air.

Second, the formation is different.

1. Cold wave: Cold air from high latitudes rapidly strengthens under certain weather conditions and invades middle and low latitudes.

2. Cold air: Most cold air masses are formed in polar regions and Siberia, with a range of thousands of kilometers and a thickness of several kilometers to dozens of kilometers.

Third, the characteristics are different.

1, cold wave: cold wave is a disastrous weather with high frequency and wide range of activities.

2. Cold air: cold air, such as tidal surge, has a wide range of influence, reaching more than 2000 kilometers.