Shanwei seasonal climate

Climate Shanwei is located south of the Tropic of Cancer and belongs to the south subtropical monsoon zone. It has a distinct maritime climate, is particularly rich in light, heat, and water resources, and the material and energy conversion is rapid. The annual average total solar radiation in the city is more than 120 kcal/cm2, and the photosynthetic potential is about 7400kg per 1/15 hectare (the total solar radiation R net photosynthetic product per kcal is 61.9kg/ha); the average annual sunshine hours is 2179.1 hours, the sunshine rate is 49%. Shanwei has a mild climate, with an annual average temperature of 21.90C. The climate is slightly different between the north and the south. The annual average temperature along the southern coast is about 220C, and in the northern mountainous area is about 210C-21.50C, with a difference of 0.5-10C. The monthly average maximum temperature is 31.70C, and the monthly average minimum temperature is 31.70C. The temperature is 19.10C; the extreme maximum temperature is 38.50C and the extreme minimum temperature is -0.10C; the safe growth period of rice is about 260 days. The city has abundant rainfall, with an average rainfall of 2200mm, making it a humid area. The rainy season in the territory begins in late March and ends in mid-October; the annual rainfall is concentrated in the flood season from April to September, accounting for more than 80% of the year; from October to March of the following year, rainfall is scarce, and rainfall accounts for only 80% of the year. 15-20% of the whole year, so spring drought and summer flood are the general rules of flood and drought disasters in Shanwei. Due to the concentration of rainfall due to topography, this city has become one of the three rainstorm centers in Guangdong Province. There has been a record of daily rainfall of 621.6mm and a maximum continuous rainfall of 1191.5mm. In addition, because Shanwei has mountains on its back and faces the sea with a long coastline, it is more susceptible to the attacks and impacts of tropical cyclones (typhoons) in the Western Pacific and South China Sea in summer and autumn. Data show that there are an average of 4.9 tropical cyclones that affect Shanwei's climate every year, with a maximum of 10 in any year. The strong winds, heavy rains and sea tides brought by cyclones often cause wind, waterlogging and tide disasters, but their abundant precipitation can also alleviate droughts and increase the number of factories. The reservoir stores water to provide abundant water resources for the production of early rice and other crops the following year.