The same condition occurs just south with the Sierra Nevada and the deserts of the Great Basin eastward. During the day, high slopes heat up more quickly than the innards of valleys, creating low pressure; this draws breezes up from the valley the valley breeze , as air moves from areas of high to low pressure. At night, the opposite effect happens: The uplands cool more quickly, amassing high pressure, so breezes begin spilling down into the valley bottom the mountain breeze.
The extremities of the topographic heat disparities mean that the valley breeze is usually strongest around noon, the mountain breeze immediately prior to sunrise.
Topographic uplifts can also affect wind concentration and strength. Therefore any mountain passes or gaps will see high winds at such times. The Columbia River creates a massive example of such a gap in the Cascade Range on the border of Washington and Oregon--a sea-level passage through those volcanic ramparts often funneling high-speed winds.
He holds a B. The Effects of Topography on the Climate. What Causes Katabatic Winds? One good example is mountains, Loyd said. The air is usually much colder if you are up high in the mountains.
Exactly what covers that land also influences the weather. Forests, cities, plains, or deserts can absorb a lot of the sunlight that reaches them, warming the air above the land. But when land is covered in snow, much of the sunlight is reflected away instead of being absorbed into the land. This also helps keep snowy areas colder. So yes, the land, as well as the water, affects the kind of weather we experience on our planet. But the weather can also affect the land.
Just think of the rain that helps plants grow on farms. Or the sun that gives plants energy they need to grow. World View. How Do Landforms Affect Climate? More From Reference. What Does "cc" Stand for in Medical Terms?
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