Isotopic constraints confirm the significant role of microbial nitrogen oxides emissions from the land and ocean environment.

ABSTRACT: Nitrogen oxides (NO_x, the sum of nitric oxide (NO) and N dioxide (NO₂)) emissions and deposition have increased markedly over the past several decades, resulting in many adverse outcomes in both terrestrial and oceanic environments. However, because the microbial NO_x emissions have been substantially underestimated on the land and unconstrained in the ocean, the global microbial NO_x emissions and their importance relative to the known fossil-fuel NO_x emissions remain unclear. Here we complied data on stable N isotopes of nitrate in atmospheric particulates over the land and ocean to ground-truth estimates of NO_x emissions worldwide. By considering the N isotope effect of NO_x transformations to particulate nitrate

SUBMITTER: Song W 

PROVIDER: S-EPMC9477198 | biostudies-literature | 2022 Sep

REPOSITORIES: biostudies-literature