Assuming steady state, calculate the oceanic residence time of nitrate, given that the primary input of fixed?

given that the primary input of fixed nitrate, via nitrogen fixation, is estimated

to be 7.0 x 10^12 mole/year, and the total volume of the ocean is 1.37 x 10^21 L. Also The average nitrate concentration in the ocean is 30 μmole L-1.

1 Answer

  • John
    Lv 6
    8 years ago
    Favorite Answer

    the total number of moles of nitrate in the ocean comes to 4.11 x 10^16

    annual production is 0.017% of that.

    which suggests each ion stays in the ocean for an average of about 5900 years

    That seems a long long time.

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