The Role of Margin-derived Inputs on Natural Iron Fertilization in the Southern Ocean


OCCI Funded Project: 2008


There is compelling evidence that iron limits phytoplankton growth in both coastal upwelling and open ocean regions. As the largest oceanic ‘high-nitrate, low-chlorophyll’ region, the Southern Ocean is of great interest to ocean biogeochemistry, with the potential for major changes in carbon export exerting a great influence on atmospheric CO2 and global climate on anthropogenic and geologic timescales. Our goal is to achieve a better understanding of benthic iron sources in the southern Patagonian shelf and the Magellan Strait, in the context of developing a first order description of the interconnected roles of submarine groundwater discharge, porewater advection in surface sediments, benthic production and remineralization in the global carbon cycle.