The problem of geographical weather

1. Side-looking judgment method (1) Foreslope. The gradient of the cold front is steeper than that of the warm front. (2) The moving direction of the cold air mass. The moving arrow of cold air mass in the cold front points directly at the front, and the moving arrow of cold air mass in the warm front forms circulation near the front. 2. Scheme judgment method (1) judges cold and warm fronts according to symbols. The cold front is represented by lines and triangles, and the warm front is represented by lines and semicircles. (2) According to the moving direction of cold and warm air mass. The moving arrow of the cold air mass points forward, while the warm air mass deviates from the front, which is the cold front, and vice versa. (3) According to the location of the rain area, the rain area behind the front is a cold front, and the rain area before the front is a warm front.