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Why are steppes usually far from oceans?

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Map showing the extent of the Eurasian steppes, highlighted in green, stretching from eastern Europe through Ukraine and southern Russia, across Kazakhstan, and into Mongolia and northern China. The map labels the Western Steppe and Eastern Steppe regions and includes major geographic features, countries, and ancient sites within the steppe zone. — the Steppe Extent of the Eurasian steppes.

Steppes are typically located deep within the interiors of continents, far from the windward coasts and sources of moist, maritime air. Because they are situated at such great distances from the world's oceans, these regions are effectively isolated from the primary sources of water vapor necessary for significant precipitation.12

This remoteness from oceanic moisture is often exacerbated by mountain barriers located upwind, which can further block rain-bearing winds from reaching the continental interior. Consequently, these areas experience a semiarid climate characterized by low humidity and limited rainfall, which prevents the development of forests and instead fosters the growth of the vast grasslands known as the steppe.12