Water
Reservoirs:
• Ocean (97.5% of global water)
• Polar Ice Sheet (2.01%; 77.2% of fresh water)
• Groundwater (0.58%; 22.1% of fresh water)
• Atmosphere & surface streams,
lakes (very
small fraction)
Water
Fluxes:
• Evaporation (from ocean+land to
atmosphere)
• Precipitation (from atmosphere to
ocean+land)
• Transpiration (land to atmosphere via vegetation)
• Surface Runoff (land to ocean)