Weather changes in Nanchang in four seasons (please emphasize)

1, climate characteristics of Nanchang

Nanchang is located in the subtropical zone of the northern hemisphere and influenced by the East Asian monsoon, forming a subtropical monsoon climate. The city is rich in heat, abundant in rain and sunshine, and the rain and heat match well in the peak season of crop growth, which provides favorable meteorological conditions for agricultural production and is known as the land of plenty. However, due to the difference of monsoon intensity and advance and retreat in the morning and evening, the temperature changes greatly, the precipitation distribution is uneven, and meteorological disasters such as high temperature drought, low temperature chilling injury, rainstorm and flood occur frequently, which has adverse effects on people's production and life.

Temperature Nanchang has a mild climate, with an average temperature of17.1~17.8℃, and a cumulative temperature of ≥0℃ of 6256 ~ 6530℃. The temperature varies greatly, with the extreme maximum temperature above 40℃ in midsummer and the extreme minimum temperature below-10℃ in midwinter.

There is abundant rainfall in Nanchang, with an average rainfall of 1567.7 ~ 1654.7 mm over the years. The distribution of precipitation is uneven, and the rainfall from April to June in flood season accounts for about half of the annual precipitation; The interannual precipitation varies greatly, with the maximum reaching more than 1 time, the maximum rainfall reaching 2356 mm at 1954, and the minimum rainfall reaching 1046 mm only at 1963.

Nanchang is sunny. The average sunshine hours over the years are 1772 ~ 1845 hours, with the most in July and August and the least in February and March. The light distribution is basically synchronized with the peak season of crop growth, which is beneficial to agricultural production.

Solar radiation Nanchang is the secondary station of solar radiation observation, which carries out total radiation and net radiation observation. The average total radiation from 1986 to 2003 was 4279.02 MJ/m2, and the average net radiation from 1992 to 2003 was 2078.67 MJ/m2.

Fengnanchang is located in the monsoon climate zone, near Poyang Lake, and is rich in wind energy resources. Because the wind is greatly influenced by topography and geographical location, Nanchang, Xinjian and Jinxian are close to Poyang Lake, and the wind is strong, which belongs to the wind energy utilization area; Anyi is not near Poyang Lake, except for the special terrain and small wind, which has no use value.

2. Seasonal characteristics According to the standard of climate division and the statistical analysis of historical climate data, Nanchang has the characteristics of short spring and autumn and long summer and winter. Although the four seasons are different in length, the seasonal characteristics are obvious: warm and humid in spring, hot and rainy in summer, cool and dry in autumn and cold and little rain in winter.

return