1. NPZD DGOM Interannual chla variability (mgChl/m3) PISCES-T Observations (SeaWiFS) Calcifiers PO 4 Fe PO 4 DOCZoo POC export

2. NPZD DGOM Surface chla (mgChl/m3) PISCES-T Observations (SeaWiFS)

3. NPZD DGOM Interannual chla variability (mgChl/m3) PISCES-T Observations (SeaWiFS)

4. NPZD DGOM Interannual chla variability (percent) PISCES-T Observations (SeaWiFS)

5. NPZD DGOM Surface chla (mgChl/m3) PISCES-T Observations (SeaWiFS) mean Interannual standard deviation 0.6 0.3

6. Log (meso-zoo/chl) Log (chl) NPZD PISCES-T Observations DGOM

7. CO 2 sink (PgC/y) Export (PgC/y) 4 10 14 0

8. oceanic carbon cycle Silicifi ers N 2 fixers DMS producer s Calcifiers Nano phytoplankt on Fe NO 3 SiSi CaCO 3 DM S PO4PO4 NH 4 DOM biological activity 11 45 34 physical transport 11 33 CO 2 CO 2 + H 2 O + CO 2- 3 2HCO - 3 chemical reactions 90

9. oceanic carbon cycle Silicifi ers N 2 fixers DMS producer s Calcifiers Nano phytoplankt on Fe NO 3 SiSi CaCO 3 DM S PO4PO4 NH 4 DOM biological activity 11 45 34 physical transport 11 33 CO 2 CO 2 + H 2 O + CO 2- 3 2HCO - 3 chemical reactions 901.8

10. oceanic carbon cycle Silicifi ers N 2 fixers DMS producer s Calcifiers Nano phytoplankt on Fe NO 3 SiSi CaCO 3 DM S PO4PO4 NH 4 DOM biological activity 11-1 45 34+1 physical transport 11 33 CO 2 CO 2 + H 2 O + CO 2- 3 2HCO - 3 chemical reactions 901.8 – 0.8