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Global Modeling of Secondary Organic Aerosol Formation from Aromatic Hydrocarbons: High- vs. Low-Yield Pathways
(European Geosciences Union, 2008)
Formation of SOA from the aromatic species toluene, xylene, and, for the first time, benzene, is added to a global chemical transport model. A simple mechanism is presented that accounts for competition between low and ...
Chemistry and Transport of Pollution over the Gulf of Mexico and the Pacific: Spring 2006 INTEX-B Campaign Overview and First Results
(European Geosciences Union, 2009)
Intercontinental Chemical Transport Experiment-B (INTEX-B) was a major NASA (Acronyms are provided in Appendix A.) led multi-partner atmospheric field campaign completed in the spring of 2006 (http://cloud1.arc.nasa.gov/intex-b/). ...
Validation of Urban \(NO_2\) Concentrations and Their Diurnal and Seasonal Variations Observed from the SCIAMACHY and OMI Sensors Using In Situ Surface Measurements in Israeli Cities
(European Geosciences Union, 2009)
We compare a full-year (2006) record of surface air \(NO_2\) concentrations measured in Israeli cities to coinciding retrievals of tropospheric \(NO_2\) columns from satellite sensors (SCIAMACHY aboard ENVISAT and OMI ...
Transition Metal-Catalyzed Oxidation of Atmospheric Sulfur: Global Implications for the Sulfur Budget
(Wiley-Blackwell, 2009)
We use observations of the oxygen-17 excess \((Δ^{17}O)\) of sulfate in the Arctic to quantify the sulfate source from aqueous \(SO_2 (S(IV))\) oxidation by \(O_2\) catalyzed by transition metals. Due to the lack of ...
Error Correlation Between CO2 and CO as Constraint for CO2 Flux Inversions Using Satellite Data
(Copernicus Publications, 2009)
Inverse modeling of CO2 satellite observations to better quantify carbon surface fluxes requires a chemical transport model (CTM) to relate the fluxes to the observed column concentrations. CTM transport error is a major ...
Intercontinental Source Attribution of Ozone Pollution at Western U.S. Sites Using an Adjoint Method
(American Geophysical Union, 2009)
We use the GEOS-Chem chemical transport model and its adjoint to quantify source contributions to ozone pollution at two adjacent sites on the U.S. west coast in spring 2006: Mt. Bachelor Observatory (MBO) at 2.7 km altitude ...
Sources and Deposition of Reactive Gaseous Mercury in the Marine Atmosphere
(Elsevier, 2009)
Observations of reactive gaseous mercury (RGM) in marine air show a consistent diurnal cycle with minimum at night, rapid increase at sunrise, maximum at midday, and rapid decline in afternoon. We use a box model for the ...
Aqueous-Phase Reactive Uptake of Dicarbonyls as a Source of Organic Aerosol Over Eastern North America
(Elsevier, 2009)
We use a global 3-D atmospheric chemistry model (GEOS-Chem) to simulate surface and aircraft measurements of organic carbon (OC) aerosol over eastern North America during summer 2004 (ICARTT aircraft campaign), with the ...
Chemical Nonlinearities in Relating Intercontinental Ozone Pollution to Anthropogenic Emissions
(American Geophysical Union, 2009)
Model studies typically estimate intercontinental influence on surface ozone by perturbing emissions from a source continent and diagnosing the ozone response in the receptor continent. Since the response to perturbations ...
Influence of Reduced Carbon Emissions and Oxidation on the Distribution of Atmospheric CO2: Implications for Inversion Analyses
(American Geophysical Union, 2005)
Recent inverse analyses constraining carbon fluxes using atmospheric CO2 observations have assumed that the CO2 source from atmospheric oxidation of reduced carbon is released at the surface rather than distributed globally ...