\(\newcommand{\p}[1]{\frac{\partial }{\partial #1}}\) \(\newcommand{\pp}[2]{\frac{\partial #1}{\partial #2}}\) \(\newcommand{\dd}[2]{\frac{d #1}{d #2}}\) \(\newcommand{\h}{\frac{1}{2}}\) \(\newcommand{\op}[1]{\operatorname{#1}}\)
8.7.3.10. Dynamic CDOM¶
To enable dynamic CDOM, define DARWIN_ALLOW_CDOM in DARWIN_OPTIONS.h. Part of the dissolved organic matter produced by grazing and plankton mortality and part of remineralized particulate organic matter then goes into a fixed-stoichiometry CDOM pool. The CDOM tracer is in units of mmol C m-3 if DARWIN_CDOM_UNITS_CARBON is defined and mmol P m-3 otherwise.
If DARWIN_CDOM_UNITS_CARBON is defined:
where \(R_{\op{POC}}\) is remineralization of POC, \(g^{\op{DOC}}\) grazing loss to DOC, \(M^{\op{DOM}}_j\) mortality loss to DOC and
CDOM degradation that goes into dissolved organic matter pools.
If DARWIN_CDOM_UNITS_CARBON is undefined:
where \(R_{\op{POP}}\) is remineralization of POP, \(g^{\op{DOP}}\) grazing loss to DOP, \(M^{\op{DOM}}_j\) mortality loss to DOC and \(D_{\op{CDOM}}\) is defined as above.
Note that with DARWIN_ALLOW_DENIT defined, CDOM degradation stops when \({\mathrm{O}}_2<{\mathrm{O}}_2^{{\text{crit}}}\) and \(\op{NO}_3<\op{NO}_3^{{\text{crit}}}\) (but bleaching continues), see Section 8.7.3.9.
Param |
Symbol |
Default |
Units |
Description |
---|---|---|---|---|
\(f_{\op{CDOM}}\) |
2/100 |
fraction of remineralized POP contributing to CDOM |
||
\(r^{\op{degrad}}_{\op{CDOM}}\) |
1/200days |
1/s |
CDOM degradation rate |
|
\(r^{\op{bleach}}_{\op{CDOM}}\) |
1/15days |
1/s |
CDOM bleaching rate |
|
\(I_{\op{CDOM}}\) |
20 |
μEin/m2/s |
PAR where CDOM bleaching becomes maximal |
|
\(R^{\mathrm{N}:\mathrm{P}}_{\op{CDOM}}\) |
16 |
mmol N / mmol P |
CDOM N:P ratio (with #undef DARWIN_CDOM_UNITS_CARBON) |
|
\(R^{\mathrm{Fe}:\mathrm{P}}_{\op{CDOM}}\) |
1D-3 |
mmol Fe / mmol P |
CDOM Fe:P ratio (with #undef DARWIN_CDOM_UNITS_CARBON) |
|
\(R^{\mathrm{C}:\mathrm{P}}_{\op{CDOM}}\) |
120 |
mmol C / mmol P |
CDOM C:P ratio (with #undef DARWIN_CDOM_UNITS_CARBON) |
|
\(R^{\mathrm{N}:\mathrm{C}}_{\op{CDOM}}\) |
16/120 |
mmol N / mmol C |
CDOM N:C ratio (with #define DARWIN_CDOM_UNITS_CARBON) |
|
\(R^{\mathrm{P}:\mathrm{C}}_{\op{CDOM}}\) |
1/120 |
mmol P / mmol C |
CDOM P:C ratio (with #define DARWIN_CDOM_UNITS_CARBON) |
|
\(R^{\mathrm{Fe}:\mathrm{C}}_{\op{CDOM}}\) |
1D-3/120 |
mmol Fe / mmol C |
CDOM Fe:C ratio (with #define DARWIN_CDOM_UNITS_CARBON) |