A steady state model of particulate organic carbon flux below the mixed layer and application to the Joint Global Ocean Flux Study
作者： Alexandria B. Boehm , Stanley B. Grant
DOI: 10.1029/2000JC000654
关键词: Atmospheric sciences 、 Clearance rate 、 Particulate organic carbon 、 Steady State theory 、 Mesopelagic zone 、 Environmental science 、 Dissolved organic carbon 、 Hydrology 、 Mixed layer
摘要: The downward flux of particulate organic carbon (POC) through the ocean is controlled by a complex coupling physical and biological processes. Here we analyze equation that describes steady state coagulation, fragmentation, sedimentation, grazing POC below mixed layer. analysis yields set conditions under which vertical uncoupled from coagulation fragmentation. When these are satisfied, model predicts decays exponentially with depth down to 200–500 m, constant. From magnitude terminal an estimate for in situ clearance rate (volume swept clear prey per grazer unit time) community can be obtained. This estimated five oceanic field sites using data collected during Joint Global Ocean Flux Study, resulting values compare favorably previously published laboratory estimates. These results suggest that, some cases, bacterial mineralization may not needed explain decline mesopelagic zone ocean.
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