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CLIMATOLOGY And It's APPLICATION - RTC, Regional Training ...

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Vegetation<br />

Vegetation also affects regional climate an observation made obvious when<br />

comparing the wind speed within a forest with the wind speed at the same<br />

height over an open field. Friction reduces the wind speed in the forest, so<br />

open areas have greater winds. The relative humidity is usually greater in a<br />

forest than in the surrounding open country. Forests depress the summer<br />

temperatures by 1 to 2 C (2-4F) below the annual mean in their vicinity. This<br />

temperature difference is driven by heat budget differences; less solar energy<br />

reaches the forest floor than the open field.

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