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Transpacific Transport of Asian Anthropogenic Aerosols and its Impact on Surface Air Quality in the United States
(American Geophysical Union, 2006)
We use satellite (MODIS) observations of aerosol optical depths (AODs) over the North Pacific, together with surface aerosol measurements at a network of remote U.S. sites (IMPROVE), to improve understanding of the ...
A Large Organic Aerosol Source in the Free Troposphere Missing from Current Models
(American Geophysical Union, 2005)
Aircraft measurements of organic carbon (OC) aerosol by two independent methods over the NW Pacific during the ACE-Asia campaign reveal unexpectedly high concentrations in the free troposphere (FT). Concentrations average ...
Sulfate Formation in Sea-Salt Aerosols: Constraints from Oxygen Isotopes
(American Geophysical Union, 2005)
We use observations of the mass-independent oxygen isotopic composition (Δ17O) of sulfate in the marine boundary layer (MBL) to quantify the sulfate source from aqueous SO2 (S(IV)) oxidation by O3 in alkaline sea-salt ...
Chemical Cycling and Deposition of Atmospheric Mercury: Global Constraints from Observations
(American Geophysical Union, 2007)
We use a global 3-D model of atmospheric mercury (GEOS-Chem) to interpret worldwide observations of total gaseous mercury (TGM) and reactive gaseous mercury (RGM) in terms of the constraints they provide on the chemical ...
Air-Sea Exchange in the Global Mercury Cycle
(American Geophysical Union, 2007)
We present results from a new global atmospheric mercury model coupled with a mixed layer slab ocean. The ocean model describes the interactions of the mixed layer with the atmosphere and deep ocean, as well as conversion ...