Modeling the Oxygen Isotope Anomaly (Δ17O) of Reactive Nitrogen in the Community Multiscale Air Quality Model: Insights into Nitrogen Oxide Chemistry in the Northeastern United States.

ABSTRACT: Atmospheric nitrate, including nitric acid (HNO₃), particulate nitrate (pNO₃), and organic nitrate (RONO₂), is a key atmosphere component with implications for air quality, nutrient deposition, and climate. However, accurately representing atmospheric nitrate concentrations within atmospheric chemistry models is a persistent challenge. A contributing factor to this challenge is the intricate chemical transformations involving HNO₃ formation, which can be difficult for models to replicate. Here, we present a novel model framework that utilizes the oxygen stable isotope anomaly (Δ¹⁷O) to quantitatively depict ozone (O₃) involvement in precursor nitrogen oxides NOx=NO+NO2 photochemical cycling and HNO₃ formation. Thi

SUBMITTER: Walters WW 

PROVIDER: S-EPMC11151734 | biostudies-literature | 2024 Jun

REPOSITORIES: biostudies-literature