The existence of a given biome is largely a function of the interaction of average annual rainfall and temperature, as indicated in the figure below. The tiles in this triangular mosaic depict the range of average temperatures and rainfall in which each biome occurs. Most models predict that climate change will increase Earth's temperature in most regions, but the amount of rainfall could remain about the same, increase, or decrease depending on other factors. Graph showing the range of average temperatures and rainfall in which each biome occurs. Average annual temperature in degrees C is represented on the y axis (30 degrees at the bottom, -10 degrees at the top). Average annual precipitation in cm/year is represented on the x axis (0-400 cm). Eight biomes are represented by different shapes and sizes of tiles on the graph. Tundra is in the upper left corner (~-4 to -10 degrees C and ~20 to 100 cm). Taiga and chaparral/grassland set under tundra, with taiga on the right (~5 to -3 degrees C and ~50 to 200 cm). Chaparral/grassland: ~18 to -3 degrees C and ~50 to 125 cm. Temperate forest sets under taiga (~20 to 5 degrees C and ~125 to 325