Fengyu gangcheng

(1) Panzhihua 1 monthly average temperature 13.6℃ (7.7℃ in Kunming and 5.5℃ in Chengdu; The average temperature in Panzhihua in June 5438+ 10 (winter) is higher than that in Kunming and Chengdu. As shown in fig. 7a, the latitude of Panzhihua is higher than that of Kunming and lower than that of Chengdu, so latitude is not the main factor. As shown in fig. 7b, Panzhihua is located in an alpine valley, so the terrain is the main factor affecting the high temperature in winter in Panzhihua. The topography of the canyon makes it difficult for cold air in the north to enter in winter. The air flow sinks and heats up, resulting in an increase in temperature. This topic is to investigate the factors that affect the temperature, including latitude, land and sea position, ocean current, topography, distance from wind source in winter, etc. The knowledge points are examined in more detail.

(2) According to the high temperature in winter in Panzhihua, on the basis of the above problems, the weather characteristics can be described from the perspectives of rain and snow, temperature and pressure, wind direction and weather conditions.

(3) It belongs to the argumentation question, which belongs to the fourth aspect of the examination objectives and requirements in the examination syllabus: demonstrating and discussing geographical issues. The goal level is high, but the proposer can simplify the complex and embody this requirement with easier topics. The air quality problem is analyzed from two aspects: natural and artificial. Baili steel city shows that industry, especially heavy industry, emits a lot of pollutants and waste gas from urban traffic; Located in the alpine valley, the air is not easy to spread, and the accumulation of pollutants produces pollution and smog.

So the answer is: (1) Due to the terrain, winter is less affected by the cold air (cold wave) in the north;

Located in the valley of the river (Jinsha River), the mountain is high and the valley is deep, and the downward flow prevails, and the airflow heats up during the sinking process.

(2) More sunny days, less clouds and rain, weak wind, high temperature and relatively stable (small fluctuation)

(3) Iron and steel industry, other industries, urban traffic, etc. emit a lot of waste gas; The terrain (high mountains and deep valleys) is relatively closed, and the downward flowing air is stable (prone to inversion), which is not conducive to the diffusion of pollutants in the air (so the air quality is not good and it is not suitable for holidays).