The weather in Luzhou city

The general climate characteristics are: the whole city belongs to subtropical humid climate zone, and the three-dimensional climate in the southern mountainous area is obvious. High temperature, abundant sunshine, abundant rainfall, four distinct seasons, long frost-free period, warm light and water in the same season, obvious monsoon climate, warm spring and autumn, hot summer and not too cold winter. The main reasons are: topographic influence: due to the barrier effect of Qinghai-Tibet Plateau, Qinba Mountains and Yunnan-Guizhou Plateau, the city has formed different microclimate zones. The influence of atmospheric circulation: it is mainly influenced by the alternating activities of dry and cold monsoon in the northern mainland and warm and wet monsoon in the southern ocean. The winter half year is mainly controlled by the continental dry and cold air mass from northwest Russia, Mongolia to southeast Xinjiang. The summer half year is mainly controlled by the western Pacific subtropical high and the Qinghai-Tibet Plateau high. The influence of climate on economic development: In winter and spring, affected by the dry and cold air mass with high north and low south, there is little rain in winter and spring, followed by drought in winter and spring. Spring sowing period is often affected by the invasion of cold air from the north to the south, resulting in cold wave or low temperature and rainy weather, which leads to rotten seeds and seedlings and affects the timely transplanting of rice. Early summer: When the high pressure activity in the Qinghai-Tibet Plateau is frequent, it is often sunny and rainy, resulting in summer drought, which is not good for the growth of planted rice. ? Midsummer: The western Pacific high extends westward and northward, and the whole city is controlled by the western part of the western Pacific high ridge, resulting in drought and high temperature in summer and great losses to agricultural production. When the subtropical high retreats from east to south, our city is prone to severe weather such as rainstorm, flood and strong wind. Autumn: Cold air from the north begins to invade the south. Under the control of Yunnan-Guizhou Plateau, cold and warm air masses meet over southern Sichuan, resulting in low temperature and rainy weather, which is not conducive to autumn harvest and autumn planting, and is also not conducive to the accumulation of organic matter in autumn harvest crops, affecting yield and quality. In winter and spring, when strong cold air affects our city, the weather is cold and the number of tourists drops sharply. When the subtropical high in midsummer controlled our city, the weather was sultry and the number of tourists was relatively reduced. The annual average temperature is 17.5- 18.0℃, the annual variation is 16.8- 18.6℃, and the annual temperature difference is 1.8℃. Luzhou City has a frost-free period of more than 300 days, with little snowfall, and some years are frost-free and snow-free, which is suitable for a long growing period of crops.