What is the most striking climate feature in Northeast China?

Northeast China spans the middle temperate zone and sub-frigid zone from south to north, belonging to temperate monsoon climate with four distinct seasons, warm and rainy in summer and cold and dry in winter.

From southeast to northwest, the annual precipitation decreases from 1000 mm to below 300 mm, and it transits from humid area and semi-humid area to semi-arid area.

The high forest coverage in Northeast China can prolong the melting time of ice and snow, and forest snow storage is helpful to the development of agriculture and forestry.

Northeast China is an important industrial and agricultural base in China. Maintaining the strategic position of national defense security, food security, ecological security, energy security and industrial security is very important, which is related to the overall development of the country.

Extended data

Temperate monsoon

It appears on the east coast of the mainland around 35 ~ 55 north latitude, including northern and northeastern China, most of Korea, northern Japan and parts of the Far East.

In winter, affected by the northerly winds in high latitudes inland, polar continental air masses prevail, which are cold and dry; In summer, influenced by polar ocean air mass or denatured tropical ocean air mass, southeast wind prevails, which is warm, hot and rainy, with rain and heat in the same season.

The annual precipitation is about 65438±0000mm, about two thirds of which is concentrated in summer. There are four distinct seasons throughout the year and the weather is changeable. With the increase of latitude, the temperature amplitude in winter and summer increases correspondingly, while the precipitation decreases gradually.

Features: It is hot and rainy in summer and cold and dry in winter.

Distribution: East coast of the mainland near 35 ~ 55 N.

Cause of formation: the difference of thermal properties between land and sea.

The continental climate in the sub-cold zone is the main climate type in the sub-cold zone, also known as the coniferous forest climate in the sub-cold zone. This kind of climate appears between 50 and 65 north latitude, also known as the sub-frigid coniferous forest climate, which is distributed in a belt and crosses North America and Eurasia.

Specifically, in North America, from Alaska to most parts of Labrador and Newfoundland via Canada; It starts from Scandinavia in the west of Eurasia, passes through Finland and western Russia to eastern Russia, and is bounded by the hottest month 10℃ isotherm in the north.

The climate in this area is mainly influenced by the polar ocean air mass and the polar continental air mass, which is the source of the polar continental air mass. In winter, there are many opportunities for the Arctic air mass to invade. In warm seasons, tropical continental air masses can sometimes penetrate.

The main features of this climate are: the winter is long and cold, the average temperature is below 0℃ for 5 ~ 7 months every year, and the cold weather of -50℃ often occurs; Summer is short and warm, and the monthly average temperature is above 10℃, and the highest temperature can reach 18 ~ 20℃, especially the annual variation. The annual precipitation is generally 300 ~ 600 mm, mainly in summer rain. Due to weak evaporation, the relative humidity is high.

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