| Role of Ballast |
|
|
|
|
|
|
|
|
|
|
|
|
|
| • | Excess
density required to sink (Smayda, 1970) |
|||||||||||
| • | Diatoms
sink readily (compared to picoplankton) |
|||||||||||
| • | Recently, that CaCO3 is necessary to
sink deeply |
|||||||||||
| – | Sinking SiO2 carries 2.6 % by weight
Org. C. while CaCO3 |
|||||||||||
| carries
7 % (Klaas and Archer, in prep.) |
||||||||||||
| – | SiO2 sinks more slowly than CaCO3
(Berelson) |
|||||||||||
| – | SiO2 remineralizes more shallowly than
CaCO3 |
|||||||||||
| (ZSiO2 ~1000 m
vs. ZCaCO3 ~2500 m) |
||||||||||||