PISCES biogeochemical model - NEMO

Figure 1: Architecture of PISCES. This figure only shows the ecosystem model omitting thus
oxygen and the carbonate system. The element which are explicitely modeled are indicated in
the left corner of each box.
except for the silicon, chlorophyll and iron content of phytoplankton. Finally, all parameters
and their standard values in PISCES are listed in Table 1 at the end of this section.
3.1 Equation for nanophytoplankton
∂P
∂t = (1 − δnano )µ nano P − m nano P
K nano + P P − wnano p P 2 − g micro (P )Z − g micro (P )M (1)
The production terms for nano/picophytoplankton is defined by :
µ nano = µ P
⎛
⎝1 − e
α P ( Chl
C
)P P AR
µ P L nano
lim
⎞
⎠ L nano
lim (2)
where µ P = ab cT and where the limitations terms are defined as follows:
L nano
po4 =
L nano
fe =
L nano
no3 =
P O 4
Kpo4 nano + P O 4
F e
K nano
F e
+ F e
Kno3
nano Knh4
nano
K nano
nh4 NO 3
+ K nano
nh4
NO 3 + K nano
no3 NH 4
3