Atmospheric peroxyacetyl nitrate (PAN): a global budget and source attribution.

ABSTRACT: Peroxyacetyl nitrate (PAN) formed in the atmospheric oxidation of non-methane volatile organic compounds (NMVOCs) is the principal tropospheric reservoir for nitrogen oxide radicals (NO_x = NO + NO₂). PAN enables the transport and release of NO_x to the remote troposphere with major implications for the global distributions of ozone and OH, the main tropospheric oxidants. Simulation of PAN is a challenge for global models because of the dependence of PAN on vertical transport as well as complex and uncertain NMVOC sources and chemistry. Here we use an improved representation of NMVOCs in a global 3-D chemical transport model (GEOS-Chem) and show that it can simulate PAN observations from aircraft campaigns worldwide. The immediate carbonyl precursors for PAN

SUBMITTER: Fischer EV 

PROVIDER: S-EPMC7983850 | biostudies-literature | 2014 Mar

REPOSITORIES: biostudies-literature