32 The Biogeochemical Theatre - Phosphorus Cycling and Phosphorus Household in Lakes
Symbol
Definition
Dimension
up
Net total P sedimentation loss rate
day"'
S,.
Net internal total P supply or loss rate
(l1g P) r' day·'
V
Lake volume
Vi
Net P uptake rate in phytoplankton population i
(118 P) (mg Cr' day·'
u
Terminal sinking velocity
mday·'
z..
Depth of the mixed layer
m
~
Biomass of zooplankton populationj
(mgC)r'