Nitrogen (N) is used in many of life's fundamental biomolecules, and it is also a participant in
environmental redox chemistry. Biogeochemical processes control the amount and form of N …

Abstract Models test our understanding of processes and can reach beyond the spatial and
temporal scales of measurements. Multi-component Reactive Transport Models (RTMs) …

Nitrogen (N) has two stable isotopes, 14N and 15N (atomic masses of 14 and 15,
respectively). 14N is the more abundant of the two, comprising 99.63 Æ 0.02% of the N …

Fixed nitrogen limits primary productivity in many parts of the global ocean, and it
consequently plays a role in controlling the carbon dioxide content of the atmosphere. The …

The isotopic composition of nitrous oxide (N2O) provides useful information for evaluating
N2O sources and budgets. Due to the co‐occurrence of multiple N2O transformation …

Nitrogen isotope compositions in sedimentary rocks (d 15 N sed) are routinely used for
reconstructing Cenozoic N-biogeochemical cycling and are also being increasingly applied …

Nitrogen (N) isotope ratios (15N/14N) provide integrative constraints on the N inventory of
the modern ocean. Anaerobic ammonium oxidation (anammox), which converts ammonium …

Biological nitrogen fixation constitutes the main input of fixed nitrogen to Earth's ecosystems,
and its isotope effect is a key parameter in isotope-based interpretations of the N cycle. The …

We present a new nitrogen isotope model incorporated into the three‐dimensional ocean
component of a global Earth system climate model designed for millennial timescale …

We present measurements of site preference (SP) and bulk 15N/14N ratios (δ15NbulkN2O)
of nitrous oxide (N2O) by quantum cascade laser absorption spectroscopy (QCLAS) as a …