Question

What is the reason for the north-facing slopes of Himalayas retain snow longer than the south facing slopes.

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Solution

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  •  Both sides of a hill receive approximately the same amount of precipitation, have similar soils and experience the same temperatures but can appear very different from each other.
  •  However, the south facing slopes receive more direct sunlight and snow will melt faster, soil moisture will evaporate faster creating a dryer micro climate than the shady north facing slope which might be only meters away.
  •  The slower evaporation on the north side means that plants (that biology connection) will have more available moisture. With the snow melting at a slower rate, there is more water available longer in to the spring.

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