I'm running ROMS 3.0 with Fasham biology, including carbon and oxygen. I have a question about one of the O2 fluxes:
The flux between zooplankton and ammonium (Z excretion + basal metabolism) produces oxygen... Why is that? I was thinking that maybe these processes could be accompanied by a sink of oxygen (representing Z respiration, which is not explicitly modeled). I'd really appreciate it if someone could explain what this source of O2 represents. Moreover, if this source is OK (and not a sign typo), should a oxygen sink from Z be included?
Thanks a lot in advance!
Laura
PS: The piece of code I'm talking about is:
Code: Select all
!
! Zooplankton mortality and excretion.
!
N_Flux_Zmortal=cff2*Bio(i,k,iZoop)
N_Flux_Zexcret=cff3*Bio(i,k,iZoop)
Bio(i,k,iNH4_)=Bio(i,k,iNH4_)+N_Flux_Zexcret
Bio(i,k,iSDeN)=Bio(i,k,iSDeN)+N_Flux_Zmortal
!
! Zooplankton basal metabolism (limited by a zooplankton minimum).
!
N_Flux_Zmetabo=cff1*MAX(Bio(i,k,iZoop)-ZooMin(ng),0.0_r8)
Bio(i,k,iZoop)=Bio(i,k,iZoop)-N_Flux_Zmetabo
Bio(i,k,iNH4_)=Bio(i,k,iNH4_)+N_Flux_Zmetabo
#ifdef OXYGEN
Bio(i,k,iOxyg)=Bio(i,k,iOxyg)+ &
& rOxNH4*(N_Flux_Zmetabo+N_Flux_Zexcret)
#endif