The alpine vegetation in the western Himalayas is found only up to a height of 3000 metres while in ...........

Geography Physiography of India

The alpine vegetation in the western Himalayas is found only up to a height of 3000 metres while in the eastern Himalayas it is found up to a height of 4000 metres. The reason for this variation in the same mountain range is that

Eastern Himalayas are higher than western Himalayas.

Eastern Himalayas are nearer to the equator and sea coast than western Himalayas.

Eastern Himalayas get more monsoonal rainfall than western Himalayas.

Eastern Himalayan rocks are more fertile than western Himalayan rocks.

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Explanation:

With every one degree change in latitude, the temperature drops by almost half degrees. Therefore eastern himalayas located around 25 degree north latitude are comparatively warmer than western himalayas located around 35 degrees north latitude. Therefore Alpine vegetation in eastern himalayas can survive higher altitudes as compared to western himalayas.

Also, proximity to sea imparts a maritime influence thereby ensuring that the climate remains moderate and alpine vegetation is possible even at higher reaches