Weather contour line

(1) Northwest and Southeast Mountain Plateau (4 points)

(2) C is warmer than India (4 points)

(3) In the winter half year, the front system (cold air and cold air mass) in the north (from China) is blocked by the terrain (mountains and Yunnan-Guizhou Plateau) in the process of moving southwest, forming a quasi-static front. (2 points)

(B B city is located on the side of the cold air mass near the front, and the ground temperature is low. There is a front and a rising warm air mass above, which is not only easy to precipitation, but also warm up and cold down, which is easy to form freezing rain. (3 points)

Analysis of test questions: This question provides a regional map with latitude and longitude network, contour lines and weather system symbols, and provides the climate statistical map of relevant cities in the illustrated area. Under this condition, we can infer related issues such as topography and climate.

According to the longitude and latitude network, it can be determined that this area is the junction of Yunnan-Guizhou Plateau and Hengduan Mountains in southwest China.

(1) According to the numerical value and distribution of contour lines, it is determined that the terrain in this area is mainly mountainous and plateau, with high terrain in the northwest and low terrain in the southeast.

(2) City A in Figure A is located at a low latitude, on the side of the heating mass, and the temperature is high. The warm air mass is located in the southwest, close to the Indian Ocean, and is the main source of precipitation and water vapor this season.

(3) The weather system shown here is a quasi-static front in Kunming, which is mainly caused by the high terrain.

(4) The formation of freezing rain consists of supercooled water droplets, which collide with objects with a temperature lower than 0℃ and freeze immediately.

B city is on the edge of cold air mass, which is easy to form freezing rain.

Comments: Taking Yunnan-Guizhou Plateau as the background, this topic investigates the interpretation of topographic map, the causes of quasi-static front in Kunming and the formation of freezing rain, which has a certain foundation, and also examines the students' ability to read and express pictures.