Manshuiwan weather

Atmospheric circulation: Beijing has a temperate monsoon climate, which is influenced by cold high-pressure air masses from Mongolia and Siberia in winter. The weather is cold and dry, and it is hot and rainy in summer due to the warm and low-pressure airflow from the Pacific Ocean. Due to the influence of the westerlies, London is mild and rainy all year round.

Ocean current: The Bohai Sea facing Beijing is a semi-closed inland sea, which is not obviously affected by ocean current. London is deeply influenced by the North Atlantic Warm Current.

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 in London is obvious.

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I. General Situation of Climate in Beijing

Beijing area spans east longitude 1 15 degrees 25 minutes-east longitude 1 17 degrees 30 minutes, and north latitude 39 degrees 28 minutes-north latitude 4 1 0 degrees 05 minutes. Surrounded by mountains on three sides, the average elevation of the ridge is about 1000 meters, forming a three-sided arc natural barrier. The piedmont plain is stepped from southeast to northwest. Beijing has a warm temperate continental climate and a semi-humid and semi-arid monsoon climate. It is characterized by less cold rain and snow in winter, less wind and humidity in spring, concentrated hot rain in summer and sufficient cool sunshine in autumn, and there are obvious regional differences. Because it is located at the intersection of cold and warm air, the annual precipitation changes greatly, and meteorological disasters such as drought, rainstorm, strong wind, hail and cold wave occur frequently.

Climatic characteristics of various seasons in Beijing

1, Spring (March-May): The temperature changes rapidly, 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 45-80 mm, accounting for about 10% of the annual precipitation. Evapotranspiration accounts for 30-32% of annual evapotranspiration. Due to the rapid temperature rise, low humidity, strong evapotranspiration and dry soil, there are windy and dusty days now, and the temperature rises quickly after the wind. This is the characteristic of Beijing's continental climate.

2. Summer (June-August): hot and rainy is a prominent feature. July is average.

The temperature in the plain is about 26 degrees, and the Yangtze River is 22-25 degrees. The precipitation is between 400-600 mm, accounting for 75% of the annual precipitation. The distribution of precipitation is uneven. Zaoshulin, Badao River and Shuiman River in Fangshan, and Luo Ying, Haizi and Jiangjunguan in Pinggu Town are rainy areas. Seasonal precipitation is 600 degrees.

3. Autumn (September-165438+1October): The seasonal characteristics are suitable cold and warm, sunny and warm with little rain.

Seasonal precipitation only accounts for 14% of the annual precipitation. The rapid cooling makes the duration of autumn shorter than that of spring, and a strong cold air goes south in late autumn and enters winter.

4. Winter (65438+February-February): cold and dry, windy and snowy season is long, which is the characteristic of this season. The monthly average temperature is below zero, and the precipitation is only about 10 mm, accounting for 2% of the annual precipitation. Strong winds and cold waves only occur in different intensities and frequencies every year.

Influenced by the North Atlantic warm current and the west wind, London has a temperate maritime climate, with small temperature difference between the four seasons, cool summer, warm winter, humid air and rainy fog, especially in autumn and winter.

The temperature in London in summer (June-August) is around18 C, sometimes reaching 30°C or even higher. The temperature is maintained at 1 1- 15 in spring (end of March-May) and autumn (September-65438+1October).