Water Cycle 1.Formulation of the hydrological cycle 2.Equations of Hydrology 3.Observations.

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Presentation transcript:

Water Cycle 1.Formulation of the hydrological cycle 2.Equations of Hydrology 3.Observations

Formulation of the hydrological cycle

Global water content 13.1x10 15 kg (~2.5cm) Annual mean precipitation ~1m Overturning ~40 times/year (9 days)

Equations of Hydrology S=P-E-R 0 -R u S- rate of storage of water P- precipitation rate (liquid and solid phase) E- evaporation rate R 0 - surface runoff R u -subterranean runoff -time-averaging,-space-averaging For large areasis small, thus accurately measured semiempiric estimates

Runoff

Balance Equations for Water Wapor -amount of precipitable water [g/m 2 ] -areal runoff, -equation for the atmospheric branch of the hydrological cycle couples land and atmospheric branches, thus Globally E=P -transport trough one parallel -vertical transport

Water Wapor in the Atmosphere (Horizontal patterns)

Water Wapor in the Atmosphere (Vertical patterns) More than 50 percent of the water vapor is below 850mb (90 percent below 500mb)

NH: Summer-Winter 1.2cm water SH: Summer-Winter 0.7cm water Global mean water content 2.5cm

Transport of Water Vapor

Aerial Runoff