What types can air masses and fronts be divided into? What are the abrupt changes of meteorological elements near the front?

Iceland's low-pressure air mass, ordinary air mass, cold front, warm front, intersection front, temperature and humidity and sudden change of wind direction.

1. Air mass: Iceland's low-pressure air mass is formed on the ocean with strong wind and precipitation, while the ordinary air mass is formed on the continent with complex distribution and weak wind and precipitation.

2. Front: A cold front is a front formed when cold air pushes warm air, a warm front is a front formed when warm air pushes cold air, and a confluence front is a front formed when two fronts of different air masses meet.

3. Sudden change performance: the temperature will drop sharply during the cold front, rise sharply during the warm front, the air humidity will drop sharply during the cold front, and the temperature will rise sharply during the warm front, which will cause the water vapor in the air to condense into clouds and form precipitation.