Siberian Tundra

To my beloved home-earth

My perspective; Ways to improve; Human Impact and Historical State

Let's protect our home-earth by starting to love Tundra~

2011年11月29日星期二

Historic Ecosystem

blueplanetbiomes.org

发帖者 Ziwen Cai 时间： 22:07

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Ziwen Cai: Beijing, Beijing, China

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Historical state

The tundra is located at the northern hemisphere in Europe, Asia and North America. it covers 20% of the earth's surface just below the polar cap. The Siberian Tundra is located in the northeastern part of Russia between 60 to 80 North latitude and 70 to 180 east longitude. In the tundra, winters are long and summers are short. During the winter temperatures are usually below freezing and the ground is covered with snow and ice. Summers are marshy from puddles called thermokarsts formed from melted snow and ice. The Lena, Ob and Yenisei are all permanent rivers that flow into the siberian Tundra. pingoes are formed from pools of water freezing under the ground and pushing the ground up into a hill. some pingoes are 3 to 300 feet tall and a half mile wide. The tundra is located 1000 to 4000 feet above sea level.

In the tundra, there are two levels of soil. The first layer is called the active layer because it freezes and thaws. It is 10 inches to 3 feet deep. The second layer is called the permafrost. It stays frozen throughout the winter and summer. The permafrost in Russia can be as deep as 1968 feet. The climate in the Siberian Tundra is the winter is very cold. The temperature may reach 40 degrees F. Summers are cool with temperatures of 37 degrees F. Precipitation is only 6 to 10 inches per year including melted snow. The tundra is very windy too. It has winds from 30 to 60 miles per hour. The windchill is so bad in the tundra, bare skin can freeze in 30 seconds. The plants of the Siberian Tundra include fungus, grasses and shrubs growing low to ground to be protected from the wind and the cold. Thus they grow up together to keep warm just like our human. In a word, indeed, Tundra looks not as pretty or attractive as other biomes, but it is where amazing happens in this planet.

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