Biological dinitrogen fixation is the major source of new nitrogen to marine systems and thus
essential to the ocean's biological pump. Constraining the distribution and global rate of …

Biological nitrogen fixation is a key process balancing the loss of combined nitrogen in the
marine nitrogen cycle. Its relevance in upwelling or high nutrient regions is still unclear, with …

Oceanic fixed-nitrogen concentrations are controlled by the balance between nitrogen
fixation and denitrification,,,. A number of factors, including iron limitation,,, can restrict …

Dinitrogen (N2) fixation is recognized as an important input of new nitrogen (N) to the open
ocean gyres, contributing to the export of organic matter from surface waters. However, very …

Nitrogen fixation supports new production in the oligotrophic oceans and removes
dinitrogen and carbon dioxide from mixed layer waters. N‐fixation rates have been …

Surface waters in upwelling regions are thought to be nutrient rich and hence inhibit
nitrogen fixation (diazotrophy) because diazotrophs can preferentially assimilate nitrate and …

The overarching goal of this study is to simulate subsurface N*(sensu, Gruber and
Sarmiento, 1997; GS97) anomaly patterns in the North Atlantic Ocean and determine the …

The stoichiometry of physical nutrient supply may provide a constraint on the spatial
distribution and rate of marine nitrogen (N 2) fixation. Yet agreement between the N 2 …

Euphotic layer dinitrogen (N2) fixation and primary production (PP) were measured in the
eastern Atlantic Ocean (38° N–21° S) using 15N2 and 13C bicarbonate tracer incubations …

Geochemical estimates of N2 fixation in the North Atlantic often serve as a foundation for
estimating global marine diazotrophy. Yet despite being well-studied, estimations of nitrogen …