Natural Resources in Tongzhou District

Tongzhou is located on the eastern coast of Chinese mainland, in the transitional climate zone between subtropical zone and south temperate zone, with obvious monsoon characteristics, distinct four seasons, synchronous rain and heat, concentrated rainfall, abundant sunshine, superior natural conditions and abundant climate resources.

Light energy resources: the annual total solar radiation is 4245~50 17MJ/m2, and the annual average sunshine hours 1992 hours.

Heat resources: the average temperature is 16℃, and the accumulated temperature that stably passes through 0℃ is 5483℃.

Water resources: annual average precipitation 1325.9mm, annual average precipitation days 1.28 days, maximum precipitation months in June and July, monthly average precipitation 1.70 ~ 1.90mm, and minimum precipitation month in 1.2. ..

Wind energy resources: the inland average wind speed is 2.8m/s, the monthly average wind speed is 2.3m/s-3.2m/s, the coastal annual average wind speed is 3.6m/s, and the monthly average wind speed is 2.5-4.4m/s. The most frequent annual wind directions are northeast wind and southeast wind.

Under normal circumstances, the climate characteristics of the four seasons in Tongzhou District are obvious. In winter, cold air activities are frequent and are easily affected by cold waves. When the cold front crosses the border (that is, when the cold air in the north goes south), the city generally cools down and the air pressure rises, and sometimes there are weather phenomena such as strong wind, rain, snow and frost. After the cold front crossed the border, the weather turned fine, forming a weather change process of "three days cold and four days warm". If strong cold air erupts to the south (that is, the strong action of winter wind) and the temperature drops above 10℃ within 48 hours, it is cold wave weather. Cold wave is the main meteorological disaster in winter in this area. When the cold wave invades, it will cause severe cooling, and sometimes there will be severe weather such as strong wind, heavy snow and freezing damage, which will cause serious harm to agricultural production, land and water transportation, municipal construction and people's lives.