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Earth System Model

  1. Nov 4, 2013 #1
    Calculate the 3 missing values from the system above assuming that it is in equilibrium

    i) Plant uptake = 196940

    ii) Ocean deposition =

    iii) Weathering of calcium phosphate minerals =

    I can't seem to understand how you find the missing parts of the model image attached I know the inflows should be equal to the outflows but thats all

    Attached Files:

  2. jcsd
  3. Nov 5, 2013 #2


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    Staff: Mentor

    Do you know what mass balance is? In a nutshell - mass is conserved, so if the mass of something is constant, sum of influxes must equal sum of outfluxes. If mass is not constant, gain (or loss) will be reflected by the fact influx and outflux are not identical.
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