The geographical environment of Yangzhou

Yangzhou city is high in the west and low in the east, with the hills and mountains in Yizheng city as the highest, and gradually inclines from west to east. Gaoyou City, Baoying County and Taizhou xinghua city are the lowest, which are shallow lakes. The highest peak in China is Datong Mountain in Yizheng City, with an altitude of 149.5 meters. The lowest point is located at the junction of Gaoyou City, Baoying County and Taizhou xinghua city, with an average elevation of 2m.

The northern part of Yangzhou City and Yizheng City is hilly, the He Lixia area is east of the Beijing-Hangzhou Grand Canal, north of the Toarey Yang Canal, and the area along the river and lake is plain. There are Shenju Mountain (99m), Datong Mountain (149.5m), Xiaotongshan and Nashan in Gaoyou City. Yangzhou city belongs to the transition zone from subtropical monsoon humid climate to temperate monsoon climate. The climate is characterized by four distinct seasons, abundant sunshine and rainfall, and the prevailing wind direction changes obviously with the seasons. In winter, it is mainly dry and cold northerly winds, mostly northeast and northwest winds; In summer, it is mostly easterly wind blowing from the hot and humid southeast to the ocean, with southeast wind as the majority; There are many southeast winds in spring; There are many northeast winds in autumn. Winter is long, more than 4 months; Followed by summer, about 3 months; Spring and autumn are short, each lasting more than 2 months.

temperature

In 20 12 years, the annual average temperature of Yangzhou 15.8 degrees Celsius, Jiangdu District 15.5 degrees Celsius, Baoying County 15.5 degrees Celsius, Gaoyou City 15.6 degrees Celsius and Yizheng City 16.0 degrees Celsius. The average temperature in June, April, May, June, July, August and June at 5438+00 is higher than that in normal months, but it is lower in February, June at 5438+0 1 and June at 5438+02, and basically the same in March and September.

The annual extreme maximum temperature in the city is 38.2 degrees Celsius (July 29th, Yangzhou), the extreme minimum temperature is minus 7.2 degrees Celsius (65438+1October 23rd, Baoying County), and the number of days with high temperature above 35 degrees Celsius 1 1 day (Baoying County) ~1. The number of days with high temperature above 35 degrees Celsius in Yangzhou city is 16 days, the first frost period is later than normal 17 days (earlier than normal1.7 days), and the final frost period is earlier than normal 18 days (3/kloc-0 days earlier in March)

deposit

In 20 12, the annual precipitation of the whole city is 864 mm in Yangzhou, 940 mm in Jiangdu, 934 mm in Baoying 1067 mm in Gaoyou and 98 1 mm in Yizheng. Compared with normal years, except Baoying County, the rest are less 10% to 20%. The monthly precipitation in all parts of the city is less than normal in 1, April, May, June and 10, and the regional distribution is uneven in March, July, August and1February, February, August, September and 1655.

sunlight

20 12 annual sunshine hours in Yangzhou 172 1 hour, Jiangdu district 1746 hour, Baoying county 1868 hour, Gaoyou city 20 17 hour, Yizheng city/kloc-. The sunshine hours are less than normal in February, March, June, August and 65438+February, while the sunshine hours are more in April, and the rest months are basically close to normal.

Meteorological disaster

The disastrous weather in Yangzhou in 20 12 mainly includes rainstorm, thunder and lightning, strong convective weather (thunderstorm and gale, thunderstorm, etc.). ), typhoon, cold wave, fog, haze and smoke.