Organic carbon particle flux

However, if the transition time of organic matter particles from one layer to another is short compared with Ds, then it is better to take H%iy = AjCa(, H e,i = A4C/,jI. In addition to these fluxes we should take into account the fluxes of detritus decomposition, solution of bottom sediments, and carbon consumption in the process of photosynthesis ... 

Fig. 6 Episodic vertical flux events of total particulate material (TPM) and particulate organic carbon (POC) at 100 m depth induced by P. pouchetii-deiived material quantified as transparent polymer particles (TEP, in terms of gum xanthan equivalents) in Balsfjord, northern Norway, from March to October, 1996. Vertical flux is given as mg nT2 d 1.

Figure 14 Fluxes and composition of particulate organic carbon in the equatorial Pacific Ocean, (a) POC fluxes (mgm d ). (b) Corresponding fractions of amino acid, carbohydrate, lipid, and molecularly uncharacterized carbon (biochemical class-carbon as a percentage of total OC) in plankton, sediment traps (105 m, l,000m, >3,500 m) and surface sediment samples. The fraction of molecularly uncharacterized organic carbon (calculated as the difference between total OC and the sum of amino acid - - carbohydrate - - Upid) increases with more extensive degradation to become the major constituent in deeper POC samples (after Wakeham et al., 1997). (c) Calculated weight percentages of amino acid, carbohydrate, and lipid in plankton and in sinking (sediment trap) particles in the upper and lower water column as determined by solid-state C-NMR spectroscopy (source Hedges et al., 2001).

Boyd P. W. and Stevens C. L. (2002) ModeUing particle transformations and the downward organic carbon flux in the NE Atlantic Ocean. Prog. Oceanogr. 52(1), 1-29. 

The flux of DIG firom the deep reservoir to the surface ocean is equal to the particle rain rate of carbon firom the surface reservoir minus the burial rate of organic carbon. The equation for DI G is exactly identical, with the exception that there is an additional loss term on the right side for radioactive decay ... 

Table 11.2. 1 The effect of the solubility and biological pumps on thefugacity 0/CO2 in the atmosphere, ffo, determined by the simple two-layer ocean model depicted in Fig. 11.2 The first row is the standard case and the rows under this indicate changes due to temperature, carbon flux, circulation rate and the organic carbon to CaCOj ratio of the particle flux, OC CaCOs. ...

Sediment traps have proved to be a relatively useful instrument to record the vertical flux of trace metals associated to sinking particles. Accordingly, a sediment trap smdy was carried out between 1999 and 2001 in the Eastern Gotland Basin to describe the composition and vertical mass fluxes of trace metals and main components like total organic carbon (ECorg) (Pohl et al., 2004). 

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