title: Sources of PM10 and sulfate aerosol at McMurdo Station, Antarctica.
abstract: Source contributions to PM10 and sulfate aerosol at McMurdo Station, Antarctica during the austral summers of 1995-1996 and 1996-1997 were estimated using Chemical Mass Balance (CMB) receptor modeling. The average PM10 (particles with aerodynamic diameters less than 10 microm) concentration at Hut Point, located less than 1 km downwind of downtown McMurdo, was 3.4 microg/m3. Emissions profiles were determined for potentially important aerosol source types in McMurdo: exposed soil, power generation, space heating, and surface vehicles. Soil dust, sea salt, combustion emissions, sulfates, marine biogenic emissions as methanesulfonate, and nitrates contributed 57%, 15%, 14%, 10%, 3%, and 1%, respectively, of average estimated PM10 at Hut Point (3.2 microg/m3). Soil dust, sea salt, and combustion sources contributed 12%, 8%, and 20%, respectively, of the average PM10 sulfate concentration of 0.46 microg/m3. Marine biogenic sources contributed 0.17 microg/m3 (37%). The remaining sulfate is thought to have come from emissions from Mt. Erebus or hemispheric pollution sources.
authors.affiliation: Entrix, Walnut Creek, CA 94596, USA.
authors.forename: D M
authors.initials: DM
authors.lastname: Mazzera
authors.forename: D H
authors.initials: DH
authors.lastname: Lowenthal
authors.forename: J C
authors.initials: JC
authors.lastname: Chow
authors.forename: J G
authors.initials: JG
authors.lastname: Watson
mesh_terms: D000336:Aerosols / Q000032:analysis; D000392:Air Movements; D000393:Air Pollutants / Q000032:analysis*; D000864:Antarctic Regions; D004784:Environmental Monitoring; D010316:Particle Size; D011210:Power Plants; D012989:Soil Pollutants; D013431:Sulfates / Q000032:analysis*; D001335:Vehicle Emissions; D018707:Volcanic Eruptions
chemical_list: D000336:Aerosols; D000393:Air Pollutants; D012989:Soil Pollutants; D013431:Sulfates; D001335:Vehicle Emissions