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Ocean currents

Ocean currents

The Great ocean conveyor is a planet-wide system of ocean currents, which has a great influence on the Earth´s climate.



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Saistītie vienumi

Atmospheric circulation

The difference between the temperature of the polar and equatorial zones causes atmospheric circulation which is affected by a number of factors, including...

El Niño

A periodic climate pattern that occurs across the tropical Pacific Ocean every five years.

Aeolian landforms on coasts and steppes

Wind, as an external force, plays an important role in shaping coastal areas and steppes.

Arctic tern

The Arctic tern is famous for its long migration route: it flies from the Arctic to the Antarctic and back again each year.

Climate zones

The Earth is divided into geographical and climatic zones, which result in the zonation of vegetation.

Continents and oceans

Dry land on the surface of Earth is divided into continents which are separated by oceans.

Glacier (intermediate)

A glacier is a large body of ice that forms from snow, and is in constant, slow motion.

How do seas shape the Earth's surface?

Seawater, as an external force, plays an important role in shaping coastlines.


Icebergs are blocks of frozen freshwater floating in the sea.

Layers of forests

The layers of different types of forests may vary.

Layers of the ocean

Physical properties, as well as the flora and fauna of the ocean change with depth.

Local winds

The most important types of local winds are the sea-land breeze, the mountain-valley breeze as well as the downslope winds.

Navigational instruments of the past

Several ingenious instruments have been invented over the centuries to help in navigating the seas.

Sālsūdens atsāļošana

Atsāļošanas procesā no sālsūdens iegūst dzeramo ūdeni.

Seafloor map

The boundaries of tectonic plates can be seen on the seafloor.

Seas and bays

This animation demonstrates the most important seas and bays.

The first voyage of James Cook

James Cook's legendary journey around the world proved to be enormously valuable for science.

The water cycle (intermediate)

Water on Earth is in a continuous state of change. The water cycle includes processes such as evaporation, precipitation, melting and freezing.

Tidal power station

Tidal power stations utilise the daily fluctuation of the water level for producing electricity.


The rise and drop of sea levels caused by the gravitational force of the Moon.

Types of waves

Waves play an extremely important role in many areas of our lives.


Tsunami waves are very high waves of immense destructive power.

Water (H₂O)

Water is a very stable compound of hydrogen and oxygen, vital for all known forms of life. In nature it occurs in liquid, solid and gaseous state.


The last Ice Age ended about 13 thousand years ago.

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