title: Sources of fine particulate species in ambient air over lake Champlain Basin, VT.
abstract: This study is a part of an ongoing investigation of the types and locations of emission sources that contribute fine particulate air contaminants to Underhill, VT. The air quality monitoring data used for this study are from the Interagency Monitoring of Protected Visual Environments network for the period of 2001-2003 for the Underhill site. The main source-receptor modeling techniques used are the positive matrix factorization (PMF) and potential source contribution function (PSCF). This new study is intended as a comparison to a previous study of the 1988-1995 Underhill data that successfully revealed a total of 11 types of emission sources with significant contributions to this rural site. This new study has identified a total of nine sources: nitrate-rich secondary aerosol, wood smoke, East Coast oil combustion, automobile emission, metal working, soil/dust, sulfur-rich aerosol type I, sulfur-rich aerosol type II, and sea salt/road salt. Furthermore, the mass contributions from the PMF identified sources that correspond with sampling days with either good or poor visibility were analyzed to seek possible correlations. It has been shown that sulfur-rich aerosol type I, nitrate aerosol, and automobile emission are the most important contributors to visibility degradation. Soil/dust and sea salt/road salt also have an added effect.
authors.affiliation: Department of Chemistry, St. Lawrence University, Canton, NY 13617, USA. ngao@stlawu.edu
authors.forename: Ning
authors.initials: N
authors.lastname: Gao
authors.forename: Amy E
authors.initials: AE
authors.lastname: Gildemeister
authors.forename: Kira
authors.initials: K
authors.lastname: Krumhansl
authors.forename: Katherine
authors.initials: K
authors.lastname: Lafferty
authors.forename: Philip K
authors.initials: PK
authors.lastname: Hopke
authors.forename: Eugene
authors.initials: E
authors.lastname: Kim
authors.forename: Richard L
authors.initials: RL
authors.lastname: Poirot
mesh_terms: D000336:Aerosols / Q000032:analysis; D000393:Air Pollutants / Q000032:analysis* / Q000737:chemistry; D004391:Dust / Q000032:analysis; D004784:Environmental Monitoring; D005618:Fresh Water; D005843:Geography; D008669:Metallurgy; D009566:Nitrates / Q000032:analysis; D010316:Particle Size; D052638:Particulate Matter / Q000032:analysis*; D010578:Petroleum / Q000032:analysis; D012906:Smoke / Q000032:analysis; D012965:Sodium Chloride; D013457:Sulfur Compounds / Q000032:analysis; D001335:Vehicle Emissions / Q000032:analysis; D014707:Vermont
chemical_list: D000336:Aerosols; D000393:Air Pollutants; D004391:Dust; D009566:Nitrates; D052638:Particulate Matter; D010578:Petroleum; D012906:Smoke; D013457:Sulfur Compounds; D001335:Vehicle Emissions; D012965:Sodium Chloride