Question
Calculate the residence time for each of the following ions found in seawater using the input from river water. (12 pts.) Identify the possible outputs
- Calculate the residence time for each of the following ions found in seawater using the input from river water. (12 pts.) Identify the possible outputs (sinks) for the following ions: Cl, Na, Mg, K, Ca, Si, P, and Mn. (8 pts.)
Ion | Seawater composition (mol/m3) | Atlantic M.O.R. a (mol/m3) | East Pacific M.O.R. a (mol/m3) | River water composition (mol/m3) |
Cl | 559520000 | 678111000 | 870534000 | 230000 |
Na | 480670000 | 524790000 | 679140000 | 315000 |
Mg | 54000000 | 0 | 0 | 160000 |
K | 10500000 | 17493000 | 43012200 | 34500 |
Ca | 10600000 | 26754000 | 36220800 | 364000 |
Si | 84000 | 22638000 | 20580000 | 193000 |
P | 2000 |
|
| 1300 |
Ti | 0.02 |
|
| 200 |
Mn | 0.2 | 1029000 | 878766 | 150 |
Al | 1000 | 545.4 | 0 | 1900 |
Fe | 0.7 | 1687560 | 3457440 | 700 |
Cu | 1.9 |
|
| 160 |
a Data from Von Damm, 1995; and Kadko et al., 1994.
Please use the following variables in your calculations:
Volume of Ocean = 1.29x1018 m3,
Global River Discharge (including direct groundwater discharge) to the oceans = 3.7 x1014 m3/year
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