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Arctic

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The Arctic is the polar region surrounding the North Pole. It lies north of the Arctic Circle, which is about 66° 34'N. This line marks the southern limit for the midnight sun and the polar night. The region includes the Arctic Ocean and many adjacent seas. It covers parts of several countries. These include Russia, Canada, the United States, Norway, Sweden, Finland, Iceland, and the Danish Realm, which includes Greenland.

Map of the Arctic region showing the Northeast Passage, the Northern Sea Route and Northwest Passage, and bathymetry
Map of the Arctic region showing the Northeast Passage, the Northern Sea Route and Northwest Passage, and bathymetry

Ecologists often use a different definition for the Arctic. They look at the temperature of the warmest month, which is July. If the average temperature in July is below 10°C, the area is considered Arctic. This temperature often follows the northernmost tree line. The land in this region is mostly treeless. Underneath the surface lies permafrost. Permafrost is ground that stays frozen for long periods. The landscape is often called the tundra.

Arctic poppy among rocks
Arctic poppy among rocks

The Arctic climate is defined by very cold winters. Summers are generally cool. Most of the area receives very little precipitation. Most of it gets less than 250 mm of precipitation per year. Most of this falls as snow. High winds can blow snow around. This can make it look like it is always snowing. Coastal areas are a bit different. The ocean helps keep coastal temperatures more moderate. These areas often have heavier snowfalls than the dry interior.

Laponie001
Laponie001

Plants in the Arctic must adapt to short growing seasons. They also deal with long periods of darkness and cold. Vegetation includes dwarf shrubs, herbs, lichens, and mosses. These plants grow close to the ground to stay warm. One example of a dwarf shrub is the bearberry. In the warmest parts, shrubs can reach 1 meter in height. In the coldest areas, the ground is often bare. Only non-vascular plants like mosses and lichens grow there.

Lake Seydozero, Sacred Sami Lake in Murmansk Oblast, Russia
Lake Seydozero, Sacred Sami Lake in Murmansk Oblast, Russia

Many animals have specialized ways to survive here. Herbivores like the muskox, reindeer, and Arctic hare live on the tundra. They are prey for animals like the Arctic fox and the snowy owl.

Muskus
Muskus
Snowy Owl Portrait
Snowy Owl Portrait

The polar bear is a major predator. It often hunts marine life from the sea ice.

Polar bears near north pole
Polar bears near north pole

In the ocean, you can find seals and walruses. There are also whales, such as the narwhal and the beluga. These animals are part of a complex marine ecosystem.

Human history in the Arctic is very long. The earliest inhabitants were part of the Arctic small tool tradition. Later, the Dorset culture lived in the central and eastern Arctic. Around the 9th or 10th century, the Thule culture began to expand. The Inuit are the descendants of the Thule. They moved into northern Canada and Greenland. Other indigenous groups, like the Sámi and Nenets, also live in the region.

Dorset, Norse, and Thule cultures 900-1500
Dorset, Norse, and Thule cultures 900-1500
Стойбище ненцев
Стойбище ненцев

The Arctic is changing due to global warming. This process is called climate change. One major effect is the decline of Arctic sea ice. Some models predict a near-complete loss of sea ice by 2035 to 2067. The Greenland ice sheet is also losing ice. This melting is linked to a process called polar amplification. As the permafrost thaws, it can release Arctic methane. The Arctic is also a vital source of water. It holds one-fifth of the Earth's total water supply.

2007 Arctic Sea Ice
2007 Arctic Sea Ice
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🖼️ Images & Media (17)
File:Laponie001.jpg
Laponie001.jpg
File:Lake Seydozero, Sacred Sami Lake in Murmansk Oblast, Russia.jpg
Lake Seydozero, Sacred Sami Lake in...
File:Arctic poppy among rocks.jpg
Arctic poppy among rocks.jpg
File:Muskus.jpg
Muskus.jpg
File:Snowy Owl Portrait.jpg
Snowy Owl Portrait.jpg
File:Dorset, Norse, and Thule cultures 900-1500.svg
Dorset, Norse, and Thule cultures 900-1500.svg
File:Circumpolar coastal human population distribution ca. 2009.png
Circumpolar coastal human population...
File:Polar bears near north pole.jpg
Polar bears near north pole.jpg
File:Map of the Arctic region showing the Northeast Passage, the Northern Sea Route and Northwest Passage, and bathymetry.png
Map of the Arctic region showing the...
File:contamination pathways large.jpg
contamination pathways large.jpg
File:2007 Arctic Sea Ice.jpg
2007 Arctic Sea Ice.jpg
File:Svolvær_Harbor_(15226568739).jpg
Svolvær_Harbor_(15226568739).jpg

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