B4 Biogeochemical Box models Here is a representation of the global cycle of C. E R Surface Cs 100 m V = ocean volume (1

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B4 Biogeochemical Box Models Here Is A Representation Of The Global Cycle Of C E R Surface Cs 100 M V Ocean Volume 1 1 (156.7 KiB) Viewed 36 times

B4 Biogeochemical Box models Here is a representation of the global cycle of C. E R Surface Cs 100 m V = ocean volume (1.349 x 10m) Vua - water exchange (mºyr''), R=river in flow (3.74 x 103 myr) C = concentration (mol m) P=particle flux (mol yr) B=burial flux (mol yr) E-Net evaporation (3.74 x 103 m yr!) V Va P Deep с B 3700 m For the 2-box model above derive the following equations: (1) Water conservation balance (2) The mass balance for Carbon in the deep layer (3) The mass balance for Carbon in the surface layer (4) Under steady state conditions what further relationship can be found for Carbon? C-ul(1), #...(1) Fav.c.19 mi [ + V (5) Using the same mass balance approach for 4C in the deep ocean the following equation can be derived: OC 14 - [] [C at note: (a) this formulation uses the ratio 14C/C, that is the amount of 14C in the total C present (b) s = surface, d = deep, 2 is the decay rate for 14C or approximately 1/8266 years. ਹੈ de (i) Rearrange this equation to get an expression for the unknown quantity Vmix (the mixing rate between the surface and Deep Ocean) (ii) If the 4c/C ratio is 12% lower in the deep water relative to surface waters calculate the residence time for water in the deep sea.