Topography and climate types of Ningbo

Ningbo is high in the southwest and low in the northeast. The urban area is 4-5.8 meters above sea level, and the suburban area is 3.6-4 meters above sea level. Geomorphology is divided into mountains, hills, terraces, valleys (basins) and plains. Mountains account for 24.9% of the land area, hills 25.2%, terraces 1.5%, valleys (basins) 8.65%, 438+0% and plains 40.3%.

The climate of Ningbo is a region formed under the comprehensive influence of solar radiation, atmospheric circulation, underlying surface properties and human activities. Ningbo is located on the coast of the East China Sea, in the southeast corner of the Yangtze River Delta. Located in Ningshao Plain, with moderate latitude, it belongs to the north subtropical monsoon climate zone. The climate is mild and humid, with obvious alternation of winter and summer monsoon. However, due to its latitude, it is often affected by the intersection of cold and warm air masses. In addition, the specific geographical location and natural environment make the weather changeable, with obvious differences and relatively frequent disastrous weather. At the same time, a variety of climate types have been formed, providing favorable natural conditions for the development of diversified businesses. Ningbo has four distinct seasons, four months in winter and summer, and two months in spring and autumn. If the average temperature is greater than 22℃ in summer, < 10℃ in winter and 10 ~ 22℃ in spring and autumn, it is generally the sixth time in March, the sixth time in June, the sixth time in September and the sixth time in 1 0.

The annual average temperature in Ningbo is 16.4℃, the highest extreme temperature is 4 1.2℃, and the lowest is-10℃. The frost-free period is 230~240 days, and the crop growth period is 300 days. The average annual precipitation is1.480mm, which is generally 30% more in mountainous and hilly areas than in plain areas. The main rainy seasons include plum rains and spring rains from March to June, typhoon storms and autumn rains from August to September, and the precipitation from May to September accounts for 60% of the whole year.

The average sunshine hours for many years are 1850 hours. The regional distribution of annual average temperature in Ningbo is more in the north and less in the south, and less in the western mountainous area than in the plain.

The main disastrous weather in Ningbo includes low temperature, continuous rain, drought, typhoon, rainstorm and flood, hail, thunderstorm and gale, frost and cold wave.