COSEE Ocean Systems: News
Effects of phytoplankton physiology on export flux
Description: Global mitigation of anthropogenic CO2 effects, e.g. by geo-engineering applications, requires an understanding of the underlying processes. One option for mitigation is a fertilization of the world's oceans to sequester carbon via fixation in phytoplankton cells, followed by subsequent sedimentation of the cells. This phytoplankton export flux is linked to the cells' physiology: Kahl, Vardi & Schofield found a decline in photosynthetic efficiency, increased oxidative stress and an initiation of autocatalytic cell death during periods of increased sticking efficiency of cells and aggregates. In a 1-dimensional export flux model, the assumption of variable sticking efficiency results in a doubling of carbon export, compared to models using a static value. [Source: Marine Ecology Progress Series]
Availability: Summary
Source: Marine Ecology Progress Series
Publish Date: 2/7/2008
Reading Level: Expert
Page Length: