(10) In winter and spring, the frequent southward cold air mass causes the near-surface temperature to be lower than 0℃ in some areas, while the upper temperature is still higher than 0℃, making the u

(10) In winter and spring, the frequent southward cold air mass causes the near-surface temperature to be lower than 0℃ in some areas, while the upper temperature is still higher than 0℃, making the upper layer cloudy.

In winter (1), a province is located in the cold air mass of Kunming quasi-static front, with rainy days; High altitude, low temperature and high probability of freezing rain.

(2) The road surface is frozen, which affects traffic; Transmission facilities freeze and wires break, which affects transmission; Harm the growth of overwintering crops, leading to agricultural production reduction; The trees were destroyed.

Test analysis:

(1) According to Guiyang, a province can be interpreted as Guizhou. In winter, Guizhou province is in the cold air mass of Kunming quasi-static front, with rainy days; High altitude, low temperature and high probability of freezing rain.

(2) The main hazard of freezing rain is that roads freeze, which affects traffic; Transmission facilities freeze and wires break, which affects transmission; Harm the growth of overwintering crops, leading to agricultural production reduction; The trees were destroyed.

Comments: The quasi-static front in the Yangtze River weather system should pay attention to its distribution area in the learning process. The quasi-static fronts affecting China mainly include the Jianghuai quasi-static front in summer and the Kunming quasi-static front in winter.