Atlantis operating model equations



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2.3 Growth of bacteria

Growth of the bacteria (GXB) is given by



(C.42)

and


(C.43)

with XB representing the maximum temperature-dependent daily growth rate for the group XB. XB is the current pool of bacteria and DL and DR are the labile and refractory detrital pools (all in mg N m-3); DL, XB and DR, XB represent the maximum possible biomass of XB per biomass of that grade of detritus; is the exponent dictating the reduction in growth as the bacterial pool approaches its maximum attainable levels (set to 3) and O2 is the oxygen limitation factor, which is given by:



(C.44)

where XB is the half oxygen mortality depth for XB, and the oxygen horizon (O2) is given by:



(C.45)

with O2sed the concentration of oxygen in the sediments, O2bw the concentration in the bottom water and sed the depth of the sediment layer considered in the model. Finally stim indicates the degree of stimulation of the bacteria by bioturbation and it is calculated as follows:



(C.46)


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