Indoor, outdoor and regional profiles of PM2.5 sulfate, nitrateand carbon

Conference · Thu Jan 31 04:00:00 EST 2002

OSTI ID:860456

Hering, S V; Lunden, M M; Kirchstetter, T W; Thatcher, T L; Revzan, K L; Sextro, R G; Brown, N J; Watson, J; Chow, J

Fine particle concentrations were measured simultaneously at three locations: a regional monitoring site in Fresno, California, a backyard of an unoccupied residence in Clovis, California located 6 km northeast of the regional site; and indoors at the same residence. Measurements included 10-min determination of PM{sub 2.5} nitrate, sulfate and carbon using an automated collection and vaporization system, and black carbon measured by light attenuation through a filter deposit. Specific outdoor PM{sub 2.5} constituents were compared to assess the appropriateness of using regional data to model indoor concentrations from outdoor sources. The outdoor data show that, in general, the regional results provide a good representation of the concentrations seen at the building exterior. The indoor concentrations showed considerable attenuation as well as a broadening and time-lag for the concentration peaks. The concentration reduction was the largest for PM{sub 2.5} nitrate, which appears to undergo phase changes in addition to indoor deposition and penetration losses.

• Research Organization: Ernest Orlando Lawrence Berkeley NationalLaboratory, Berkeley, CA (US)
• Sponsoring Organization: USDOE. Assistant Secretary for Fossil Energy. Office ofNatural Gas and Petroleum Technology. National Petroleum TechnologyOffice; Western States Petroleum Association
• DOE Contract Number: AC02-05CH11231
• OSTI ID: 860456
• Report Number(s): LBNL--49980; BnR: AC1015000
• Country of Publication: United States
• Language: English

Related Subjects

54 ENVIRONMENTAL SCIENCES
AIR QUALITY
ATTENUATION
CALIFORNIA
CARBON
CLIMATES
DEPOSITION
EVAPORATION
INDOOR AIR POLLUTION
MONITORING
NITRATES
SULFATES