Explore the relationship between climate and topography in Longkou city.

Longkou belongs to temperate monsoon climate, with no severe cold in winter, no intense heat in summer, four distinct seasons and pleasant climate. The annual average temperature is about 12℃, not lower than-10℃ in winter and not higher than 40℃ in summer. According to the meteorological data in June, it has exceeded 35℃. The average annual rainfall is about 600 mm, and the frost-free period is more than 190 days.

Second, the terrain.

Longkou City is located in the northern part of Jiaodong low hills, with high terrain in the southeast and low terrain in the northwest, which shows a step-by-step decline. There are many low hills in the southeast and coastal plains in the northwest. The city is like a maple leaf. Urban landforms can be divided into three types: mountainous area, hilly area and plain area. The southeast is a low mountainous area with an area of 155.62 square kilometers, accounting for 17.47% of the city's total area. There are 365,438+065,438+0 hills, of which 9 are 500-599 with an altitude of over 600 meters. Hills are mainly distributed in the northern edge of the southern low mountains, belonging to structural erosion and structural erosion types. Due to long-term weathering and erosion, the top of the mountain is round, the hillside is gentle, and the valley is shallow and wide, showing a U-shape. The alluvial deposits in the valley are well developed and the soil layer is thick, covering an area of 28 1. 1.02 square kilometers, accounting for 3 1.56% of the total area of the city. According to the genesis and geomorphological characteristics, the plain can be divided into three types: valley alluvial plain, piedmont alluvial plain and coastal accumulation plain, with a total area of 454.03 square kilometers, accounting for 50.97% of the city's total area.