Ocean Modeling Discussion

ROMS/TOMS

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PostPosted: Wed Jun 15, 2011 2:21 pm 
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Joined: Mon Aug 16, 2004 8:47 pm
Posts: 81
Location: U.S. Geological Survey, Woods Hole
In fennel.h, line 707 has:

Code:
! Phytoplankton grazing by zooplankton.
!
              cff1=fac1*Bio(i,k,iZoop)*Bio(i,k,iPhyt)/                  &
     &             (K_Phy(ng)+Bio(i,k,iPhyt)*Bio(i,k,iPhyt))
              cff3=1.0_r8/(1.0_r8+cff1)
              Bio(i,k,iPhyt)=cff3*Bio(i,k,iPhyt)


as the grazing rate; but Fennel (2006), Eq. 7 has Phytoplankton^2 in the numerator. If this isn't a typo, for a large Zoop, you get a large cff1, a small cff3 and less of a decline in Phyt. Does this work itself out elsewhere, or should it really be
Code:
! Phytoplankton grazing by zooplankton.
!
              cff1=fac1*Bio(i,k,iPhyt)*Bio(i,k,iPhyt)/                  &
     &             (K_Phy(ng)+Bio(i,k,iPhyt)*Bio(i,k,iPhyt))
              cff3=1.0_r8/(1.0_r8+cff1)
              Bio(i,k,iPhyt)=cff3*Bio(i,k,iPhyt)


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PostPosted: Wed Jun 15, 2011 2:27 pm 
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Joined: Mon Aug 16, 2004 8:47 pm
Posts: 81
Location: U.S. Geological Survey, Woods Hole
sorry, ignore this....it makes complete sense as is.


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