Altitudinal Gradients An increase in altitude (elevation) mimics a progression towards northern biomes.
THE TUNDRA. Location Tundra biomes are most commonly found in the Northern hemisphere. Tundra covers approximately 20% of the Earth, situated at latitudes.
Recent increases in the growing season length at high northern latitudes Nicole Smith-Downey* James T. Randerson Harvard University UC Irvine Sassan S.
