Using the data in the diagram of the water cycle to estimate the residence time
ID: 290879 • Letter: U
Question
Using the data in the diagram of the water cycle to estimate the residence time of water in the atmosphere, land and the oceans.
1. Using the data in the diagram of the water cycle to estimate the residence time of water in the atmosphere, land and the oceans. Show your work! Global Water Reservoirs and Fluxes Atmosphere 16 Evapo- Transpiration 2.2 Sv Precipitation 3.5 Sv Evaporation 13.5 Sv Precipitation 12.2 Sv Land 59,000 Rivers 1.3 Sv Oceans 1,400,000 Reservoirs in 103 km3, Fluxes in 106 m3/s (= Sv) Atmosphere: Ocean: Land:Explanation / Answer
Residence time of water in Atmosphere = Volume of water in atmosphere / Net loss of water from atmosphere
Net loss of water from atmosphere=(precipitation from land + precipitation from)-(Evapotranspiration + Transpiration)
Net loss of water from atmosphere = (3.5 +12.2) - (2.2 + 13.5) = 15.5 -15.5 = 0 x 106
Residence time of water in Atmosphere = 16 x 109 / 0 = Infinity (1 km3 = 109 m3)
Residence time of water in Land = 59,000 x 109 / [(2.2+1.3-3.5)x 106] = 59,000 x 109 / 0 = Infinity
Residence time of water in Ocean = 1,400,000 x 109 / [(13.5 - 12.2 -1.3) x 106] = 1,400,000 x 109 / 0 = Infinity
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