Citation:

LEWIS, C. W. RADIOCARBON ¹⁴C MEASUREMENTS ON ATMOSPHERIC SAMPLES OF PARTICULATE MATTER (& VOLATILE ORGANIC COMPOUNDS). Presented at Lawrence Livermore National Laboratory, Livermore, CA, February 17, 2005.

Impact/Purpose:

Develop and evaluate methods for the sampling and analysis of PM in ambient air, with emphasis on FRM/FEM for PMc, measurement of carbonaceous aerosols, measurement of biogenic aerosols, comparisons measurements from the STN and IMPROVE monitoring networks, and continuous methods for PM mass and its chemical components.

Description:

Following a brief history of radiocarbon work at EPA since the 1980's, the presentation focuses on recent non-winter measurements for PM-2.5 in the Southeastern U.S. (Houston, TX; Nashville, TN; and particularly, Tampa, FL) and what the measurements suggest about the importance of biogenic secondary organic aerosol (SOA) in this region. New measurements are also presented relating to the issue of bio-fuels (gasohol and biodiesel) and how their usage may affect the interpretation of future radiocarbon measurements.

Record Details: