NCP in the Mauritanian upwelling

Interactive comment on “Biological productivity in the Mauritanian upwelling estimated with a triple gas approach” by T. Steinhoff et al

General Comments The authors present a novel approach for calculating net community production (NCP) in eastern boundary upwelling systems using data from the Mauritanian Upwelling as a case study. Their calculations rely on a triple gas approach (N2O; CO2 and O2), though O2 is primarily used to validate the results derived for CO2. Briefly, N2O is used as a quasi-inert tracer of recently upwel...

Interactive comment on “Biological productivity in the Mauritanian upwelling estimated with a triple gas approach” by T. Steinhoff et al

General Comments The authors present a novel approach for calculating net community production (NCP) in eastern boundary upwelling systems using data from the Mauritanian Upwelling as a case study. Their calculations rely on a triple gas approach (N2O; CO2 and O2), though O2 is primarily used to validate the results derived for CO2. Briefly, N2O is used as a quasi-inert tracer of recently upwel...

Interactive comment on “Biological productivity in the Mauritanian upwelling estimated with a triple gas approach” by T. Steinhoff et al

This paper describes a clever way of deriving net community production (NCP) using measured mixed layer concentrations of N2O, O2 and CO2. This seems to me to be a basically sound approach and is appropriate for publication in Biogeosciences. In agreement with the exhaustive comments of a previous anonymous reviewer I believe that the major issues to address are those relating to data and calcu...

Controls on seawater Fe(III) solubility in the Mauritanian upwelling zone

[1] Iron solubility measurements in the Mauritanian upwelling and the adjacent Open Ocean of the Tropical Atlantic show for all stations lower values in the surface mixed layer than at depth below the pycnocline. We attribute this distribution to a combination of loss terms, chiefly photo-oxidation of organic ligands in the surface, and supply terms, predominantly from the release of ligands fr...

Interactive comment on “Biological productivity in the Mauritanian upwelling estimated with a triple gas approach” by T. Steinhoff et al