Figure W120W90W60W30W E120E90E60E30E Tropical savannaTropical rainforestSemi-aridArid Mediterranean Humid subtropicalMarine Humid continental, warmHumid continental, cool SubarcticTundraIce cap 90N 60N 30N 0 30S 60S 90S Ecological Climatology © 2008 G. Bonan

Figure 2.2 SeptemberNovemberJanuary MarchMayJuly Snow Cover (%) Ecological Climatology © 2008 G. Bonan

Figure 2.3 Ecological Climatology © 2008 G. Bonan

Figure 2.4 Ecological Climatology © 2008 G. Bonan

Figure 2.5 Ecological Climatology © 2008 G. Bonan

Figure 2.6 Ecological Climatology © 2008 G. Bonan

Billions of People Figure 2.7 Ecological Climatology © 2008 G. Bonan

Figure 2.8 Ecological Climatology © 2008 G. Bonan

Figure 2.9 Ecological Climatology © 2008 G. Bonan