地理漫步·世界地理英语30篇（4）
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Patagonian Steppe: A Wind-Swept Arid Zone at the Southern Tip
巴塔哥尼亚草原：南端风蚀干旱带
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The Patagonian steppe stretches across southern Argentina and Chile, shaped by rain shadows from the Andes.
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Cold Falkland Current offshore cools air masses, reducing moisture before they reach land.
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Strong westerly winds erode soils and limit tree growth across this vast semi-desert region.
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Despite low rainfall, endemic shrubs and hardy grasses adapt through deep taproots and woolly leaves.
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Glacial moraines and ancient lakebeds reveal how ice-age climate shifts reconfigured this landscape.
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Sheep ranching dominates land use, but overgrazing intensifies desertification in vulnerable micro-basins.
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Rivers like the Chubut flow intermittently, carving narrow valleys amid otherwise flat, gravelly plains.
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Biodiversity includes guanacos, Darwin’s rheas, and burrowing owls adapted to open, windy spaces.
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Seasonal dust storms transport fine sediments hundreds of kilometers toward the Atlantic Ocean.
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Conservation efforts focus on protected areas such as Monte León National Park to safeguard fragile ecosystems.