Particulate nitrate photolysis in the atmosphere

Nitrate photolysis on ice surfaces

Introduction Conclusions References Tables Figures Back Close Full Screen / Esc Abstract Introduction Conclusions References Tables Figures Back Close Full Screen / Esc Printer-friendly Version Interactive Discussion EGU Abstract Nitrate photolysis in the wavelength range 250–1200 nm was studied on ice in a controlled laboratory experiment. Monolayer coverage of nitrate was achieved by dosing w...

Surface-enhanced nitrate photolysis on ice.

Heterogeneous nitrate photolysis is the trigger for many chemical processes occurring in the polar boundary layer and is widely believed to occur in a quasi-liquid layer (QLL) at the surface of ice. The dipole-forbidden character of the electronic transition relevant to boundary layer atmospheric chemistry and the small photolysis/photoproduct yields in ice (and in water) may confer a significa...

The Quantum Yield of N03 from Peroxyacetyl Nitrate Photolysis

Peroxyacetyl nitrate (PAN) vapor was photolyzedat 248 nmandthe N03 photoproduct wasdetected bylaser induced fluorescence. Thequantum yield fortheproduction of N03 was determined by comparison to N 205 photolysis data taken under identical experimental conditions. Contributions to the observed laser induced fluorescence were found to arise from excited state photoproducts such as N02* . The exci...

Particulate nitrate measurement using nylon filters.

Nylon filters are a popular medium to collect atmospheric fine particles in different aerosol monitoring networks, including those operated by the U.S. Environmental Protection Agency and the Interagency Monitoring of Protected Visual Environments (IMPROVE) program. Extraction of the filters by deionized water or by a basic aqueous solution (typically a mixture of sodium carbonate and sodium bi...

SUPPLEMENTARY INFORMATION Surface-Enhanced Nitrate Photolysis on Ice