Climate difference between Beijing and London (according to atmospheric circulation, ocean current and land-sea distribution)
Ocean current: The Bohai Sea facing Beijing is a semi-closed inland sea. The effect of ocean currents is not obvious. London is deeply influenced by the warm current of the North Atlantic Ocean.
Land and sea distribution: Beijing is backed by Eurasia and faces the Pacific Ocean, with a strong continental climate. Britain is an island country in the Atlantic Ocean, and the maritime climate of London is obvious.
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I. General situation of Beijing's climate
The Beijing area spans 115 degrees 25 minutes east longitude-117 degrees 3 minutes east longitude, and the longitudinal span is 39 degrees 28 minutes north latitude-41 degrees 5 minutes north latitude. It is surrounded by mountains on three sides, and the average altitude of the ridge is about 1 meters, forming an arc-shaped natural barrier on three sides. The terrain is stepped from southeast to northwest. Beijing belongs to a continental climate with warm temperate zone, semi-humid and semi-arid monsoon. It is characterized by cold rain and snow in winter, strong wind and low humidity in spring, concentrated hot rain in summer and sufficient cool sunshine in autumn, and there are obvious regional differences. Because it is located in the intersection of cold and warm air, the annual precipitation changes greatly. Meteorological disasters such as drought, rainstorm, gale, hail and cold wave occur frequently.
Climate characteristics of Beijing in each season
1. Spring (March-May): the temperature is changeable and fast, and there are often strong winds to cool down.
The number of windy days accounts for 36% of the number of windy days in the whole year. The precipitation is 45-8 mm, accounting for about 1% of the annual precipitation. The soil is dry, so windy and dusty days occur from time to time, and the temperature rises rapidly after the wind. This is the characteristic of Beijing's continental climate.
2. Summer (June-August) is a remarkable characteristic. The average temperature in July is < P > 26 degrees in the plain, 22-25 degrees in the Changjiang River, and 4-65 degrees in most mountainous areas. Zaoshulin and Badaohe in Huairou County, Manshui River in Fangshan, Luoying, Haizi and Jiangjunguan in Pinggu Town are rainy areas. The seasonal precipitation is more than 6-7 mm, while in the mountainous areas north of Kangzhuang and Zhangshanying in the northwest, the seasonal precipitation is less than 4 mm, and the precipitation intensity is high. Usually, several rainstorms or one or two rainstorms are equivalent to monthly precipitation.
3. Sunny, warm and little rain is the characteristic of this season.
Seasonal precipitation only accounts for 14% of the annual precipitation. The rapid cooling makes the duration of autumn shorter than that of spring. In late autumn, a strong cold air moves south, and then it enters winter.
4. Winter (December-February): cold and dry, windy and little snow, which is the characteristic of this season. The average temperature in each month is below zero, and the precipitation is only about 1 mm, accounting for. Strong winds and cold waves occur only with different intensities and times every year.
London is influenced by the North Atlantic warm current and westerly wind, and has a temperate maritime climate, with small temperature difference among the four seasons, cool in summer, warm in winter, humid air and rainy fog, especially in autumn and winter.
The temperature in London in summer (June-August) is around 18°C, and sometimes it will reach 3°C or higher. In spring (June-August),