Analyze the characteristics of precipitation and temperature in Guangzhou, Beijing, Lanzhou and Lhasa.

Among the four cities, Guangzhou has a subtropical monsoon climate, with the highest temperature in winter. The average temperature in Leng Yue is around 12 degrees Celsius, and the annual precipitation is the most, reaching1500mm. ; Beijing belongs to the temperate monsoon climate, with the lowest monthly average temperature of -5 degrees and annual precipitation of about 600MM; Lanzhou belongs to temperate continental climate, the average temperature in Leng Yue is below-10, and the annual precipitation is only 327MM；. Lhasa has a plateau and mountainous climate, with cool summer and annual precipitation of about 500MM.

Climatic characteristics of China.

1. The climate is complex and diverse.

China has a vast territory, a wide latitude, a long distance from the sea, and different terrain types and mountains, so there are various combinations of temperature and precipitation, forming a variety of climates. In terms of climate types, the east belongs to monsoon climate (which can be divided into subtropical monsoon climate, temperate monsoon climate and tropical monsoon climate), the northwest belongs to temperate continental climate, and the Qinghai-Tibet Plateau belongs to alpine climate. According to the temperature zone, there are tropical zone, subtropical zone, warm temperate zone, middle temperate zone, cold temperate zone and Qinghai-Tibet Plateau. Divided from dry and wet areas, there are humid areas, semi-humid areas, semi-arid areas and arid areas. In addition, the same temperature zone can contain different dry zones and wet zones; There are different temperature zones in the same dry and wet area. Therefore, under the same climate type, there will also be differences in heat and humidity.

2. Monsoon climate is remarkable.

The climate of China is characterized by high temperature and rain in summer, cold and little rain in winter, and the high temperature period is consistent with the rainy period. Because China is located in the east of Eurasia, the largest continent in the world, on the west coast of the Pacific Ocean, and near the Indian Ocean in the southwest, the climate is greatly influenced by the mainland and the ocean. In winter, the north wind blows from the mainland to the ocean, and in summer, the south wind blows from the ocean to the land. Leng Xia is hot in winter, dry in winter and rainy in summer. This climatic feature of the same season of rain and heat is very beneficial to agricultural production. Winter crops have been harvested or stopped growing, and generally do not need much water. Summer crops grow vigorously, which is the season that needs a lot of water. Compared with the same latitude zone, the seasonal distribution of precipitation in China is similar to that in the subtropical eastern United States and India, but compared with North Africa at the same latitude, it belongs to an extremely dry desert climate, with an annual rainfall of only110 mm. Compared with other parts of the world at the same latitude, the temperature in China is low in winter and high in summer, and annual range is large, and the precipitation is concentrated in summer, which are the characteristics of continental climate. Therefore, the monsoon climate in China is continental, which is also called continental monsoon climate. Although the climate in China is beneficial to the development of agricultural production in many ways, it also has disadvantages. Frequent disastrous weather in China often has adverse effects on China's production, construction and people's lives. Among them, drought, flood, cold wave and typhoon are the main disastrous weather that have great influence on China. Drought and flood disasters occur once a year on average in China, mostly in the north and also in the south. In summer and autumn, the southeast coast of China is often hit by tropical storms-typhoons. In autumn and winter in China, cold air from Mongolia and Siberia keeps going south. When the cold air is particularly strong, the temperature drops suddenly and a cold wave appears. Cold wave will cause low temperature, strong wind, sandstorm, frost and other disasters.

(Data from China Meteorological Bureau. )